Fix: update macOS x64 identifier to x86_64 in surfer.json

Signed-off-by: Jai A P <jai.jap.318@gmail.com>
Co-authored-by: Jai A P <jai.jap.318@gmail.com>

.gitmodules

@@ -1,6 +1,3 @@
-[submodule "src/browser/base/content/zen-components"]
-	path = src/browser/base/content/zen-components
-	url = https://github.com/zen-browser/components
 [submodule "l10n"]
 	path = l10n
 	url = https://github.com/zen-browser/l10n-packs

README.md

@@ -21,14 +21,14 @@
     Documentation
   </a>
   •
-  <a href="https//zen-browser.app/release-notes/latest">
+  <a href="https://zen-browser.app/release-notes/latest">
     Release Notes
   </a>
 </div>
 
 ## 🖥️ Compatibility
 
-Zen is currently built using firefox version `131.0.3`! 🚀
+Zen is currently built using firefox version `132.0.1`! 🚀
 
 - Check out the latest [release notes](https://zen-browser.app/release-notes)!
 - Part of our mission is to keep Zen up-to-date with the latest version of Firefox, so you can enjoy the latest features and security updates!

configs/linux/mozconfig

@@ -1,24 +1,25 @@
-
+# Setting the compiler based on the existence of clang bin directory
 if test -d "$HOME/.mozbuild/clang/bin"; then
-    export CC="$HOME"/.mozbuild/clang/bin/clang
-    export CXX="$HOME"/.mozbuild/clang/bin/clang++
+    export CC="$HOME/.mozbuild/clang/bin/clang"
+    export CXX="$HOME/.mozbuild/clang/bin/clang++"
 else
     export CC=clang
     export CXX=clang++
 fi
 
 if test "$ZEN_RELEASE"; then
-
+    # Disable DMD and ELF hacks, enable linker lld
     ac_add_options --disable-dmd
     ac_add_options --enable-linker=lld
     ac_add_options --disable-elf-hack
-
     ac_add_options --disable-necko-wifi
 
+    # Stripping options for release builds
     ac_add_options --enable-install-strip
     ac_add_options --enable-strip
     export STRIP_FLAGS="--strip-debug --strip-unneeded"
 
+    # Using sccache if available
     if [ -f /home/runner/.mozbuild/sccache/sccache ]; then
         mk_add_options 'export RUSTC_WRAPPER=/home/runner/.mozbuild/sccache/sccache'
         mk_add_options 'export CCACHE_CPP2=yes'
@@ -26,10 +27,12 @@ if test "$ZEN_RELEASE"; then
         mk_add_options 'export SCCACHE_GHA_ENABLED=on'
     fi
 
+    # Enable Profile Guided Optimization
     export MOZ_PGO=1
     ac_add_options MOZ_PGO=1
 
     if test "$SURFER_COMPAT" = "true"; then
+        # Optimization flags for SURFER_COMPAT
         ac_add_options --enable-optimize="-O3 -march=x86-64"
 
         export CFLAGS="$CFLAGS -O3 -ffp-contract=fast -march=x86-64"
@@ -38,20 +41,23 @@ if test "$ZEN_RELEASE"; then
         export LDFLAGS="$LDFLAGS -Wl,-O3 -Wl,-mllvm,-fp-contract=fast -march=x86-64"
         export RUSTFLAGS="$RUSTFLAGS -C target-cpu=x86-64 -C codegen-units=1 -Clink-args=--icf=safe"
     else
+        # Optimization flags for general release
         ac_add_options --enable-wasm-avx
         ac_add_options --enable-optimize="-O3 -march=x86-64-v3 -msse3 -mssse3 -msse4.1 -msse4.2 -mavx -maes -mpopcnt -mpclmul"
         
-        export CFLAGS="$CFLAGS -O3 -ffp-contract=fast -march=x86-64-v3 -msse3 -mssse3 -msse4.1 -msse4.2 -mavx -mavx2 -mfma -maes -mpopcnt -mpclmul"     
+        export CFLAGS="$CFLAGS -O3 -ffp-contract=fast -march=x86-64-v3 -msse3 -mssse3 -msse4.1 -msse4.2 -mavx -mavx2 -mfma -maes -mpopcnt -mpclmul"
         export CPPFLAGS="$CPPFLAGS -O3 -ffp-contract=fast -march=x86-64-v3 -msse3 -mssse3 -msse4.1 -msse4.2 -mavx -mavx2 -mfma -maes -mpopcnt -mpclmul"
         export CXXFLAGS="$CXXFLAGS -O3 -flto=thin -ffp-contract=fast -march=x86-64-v3 -msse3 -mssse3 -msse4.1 -msse4.2 -mavx -mavx2 -mfma -maes -mpopcnt -mpclmul"
         export LDFLAGS="$LDFLAGS -Wl,-O3 -Wl,-mllvm,-fp-contract=fast -march=x86-64-v3"
         export RUSTFLAGS="$RUSTFLAGS -C target-cpu=x86-64-v3 -C target-feature=+sse4.1 -C target-feature=+avx2 -C codegen-units=1 -Clink-args=--icf=safe"
     fi
+
     export VERBOSE=1
+    # Uncomment if you want to enable Polly optimizations
     #export POLLY="-mllvm -polly -mllvm -polly-2nd-level-tiling -mllvm -polly-loopfusion-greedy -mllvm -polly-pattern-matching-based-opts -mllvm -polly-position=before-vectorizer -mllvm -polly-vectorizer=stripmine"
 fi
 
+# Common options
 ac_add_options --target=x86_64-pc-linux
-
 ac_add_options --enable-alsa
 ac_add_options --enable-pulseaudio

configs/macos/mozconfig

@@ -36,4 +36,7 @@ else
     export RUSTFLAGS="-C target-feature=+v8.3a -C codegen-units=1 -Ctarget-cpu=apple-m1"
 fi
 export VERBOSE=1
-#export POLLY="-mllvm -polly -mllvm -polly-2nd-level-tiling -mllvm -polly-loopfusion-greedy -mllvm -polly-pattern-matching-based-opts -mllvm -polly-position=before-vectorizer -mllvm -polly-vectorizer=stripmine"
+
+# Enable polly for macos, since they have a more stable set of GPU drivers,
+# unlike Linux, which has a lot of different drivers.
+export POLLY="-mllvm -polly -mllvm -polly-2nd-level-tiling -mllvm -polly-loopfusion-greedy -mllvm -polly-pattern-matching-based-opts -mllvm -polly-position=before-vectorizer -mllvm -polly-vectorizer=stripmine"

flatpak/io.github.zen_browser.zen.yml.template

@@ -22,6 +22,7 @@ finish-args:
   - --filesystem=xdg-download:rw
   - --device=all
   - --talk-name=org.freedesktop.FileManager1
+  - --talk-name=org.freedesktop.portal.Desktop
   - --talk-name=org.freedesktop.ScreenSaver
   - --own-name=org.mozilla.zen.*
   - --own-name=org.mpris.MediaPlayer2.firefox.*

src/browser/app/profile/better-fox.js

@@ -66,15 +66,9 @@ pref("dom.security.sanitizer.enabled", true);
 pref("urlclassifier.trackingSkipURLs", "*.reddit.com, *.twitter.com, *.twimg.com, *.tiktok.com");
 pref("urlclassifier.features.socialtracking.skipURLs", "*.instagram.com, *.twitter.com, *.twimg.com");
 pref("network.cookie.sameSite.noneRequiresSecure", true);
-pref("browser.download.start_downloads_in_tmp_dir", true);
 pref("browser.helperApps.deleteTempFileOnExit", true);
 pref("browser.uitour.enabled", false);
 
-/** OCSP & CERTS / HPKP ***/
-pref("security.OCSP.enabled", 0);
-pref("security.remote_settings.crlite_filters.enabled", true);
-pref("security.pki.crlite_mode", 2);
-
 /** SSL / TLS ***/
 pref("security.ssl.treat_unsafe_negotiation_as_broken", true);
 pref("browser.xul.error_pages.expert_bad_cert", true);
@@ -106,12 +100,6 @@ pref("privacy.userContext.ui.enabled", true);
 /** SAFE BROWSING ***/
 pref("browser.safebrowsing.downloads.remote.enabled", false);
 
-/** MOZILLA ***/
-pref("permissions.default.desktop-notification", 2);
-pref("permissions.default.geo", 2);
-pref("permissions.manager.defaultsUrl", "");
-pref("webchannel.allowObject.urlWhitelist", "");
-
 /** TELEMETRY ***/
 pref("datareporting.policy.dataSubmissionEnabled", false, locked);
 pref("datareporting.healthreport.uploadEnabled", false, locked);
@@ -141,9 +129,6 @@ pref("browser.tabs.crashReporting.sendReport", false);
 pref("browser.crashReports.unsubmittedCheck.autoSubmit2", false);
 
 /** DETECTION ***/
-pref("captivedetect.canonicalURL", "");
-pref("network.captive-portal-service.enabled", false);
-pref("network.connectivity-service.enabled", false);
 pref("dom.private-attribution.submission.enabled", false);
 
 /****************************************************************************

src/browser/base/content/ZenCustomizableUI.sys.mjs

@@ -2,14 +2,14 @@ export var ZenCustomizableUI = new (class {
   constructor() {}
 
   TYPE_TOOLBAR = 'toolbar';
-  defaultSidebarIcons = ['zen-sidepanel-button', 'zen-workspaces-button', 'new-tab-button'];
+  defaultSidebarIcons = ['zen-profile-button', 'zen-workspaces-button', 'downloads-button'];
 
   startup(CustomizableUIInternal) {
     CustomizableUIInternal.registerArea(
       'zen-sidebar-top-buttons',
       {
         type: this.TYPE_TOOLBAR,
-        defaultPlacements: ['preferences-button', 'zen-expand-sidebar-button', 'zen-profile-button'],
+        defaultPlacements: ['preferences-button', 'zen-expand-sidebar-button', 'zen-sidepanel-button'],
         defaultCollapsed: null,
       },
       true
@@ -46,21 +46,7 @@ export var ZenCustomizableUI = new (class {
         mode="icons">
         <hbox id="zen-sidebar-top-buttons-customization-target" class="customization-target" flex="1">
           <toolbarbutton removable="true" class="chromeclass-toolbar-additional toolbarbutton-1 zen-sidebar-action-button" id="zen-expand-sidebar-button" data-l10n-id="sidebar-zen-expand" cui-areatype="toolbar" oncommand="gZenVerticalTabsManager.toggleExpand();"></toolbarbutton>
-          <toolbarbutton id="zen-profile-button" 
-            class="zen-sidebar-action-button toolbarbutton-1 chromeclass-toolbar-additional"
-            delegatesanchor="true"
-            onmousedown="ZenProfileDialogUI.showSubView(this, event)"
-            onkeypress="ZenProfileDialogUI.showSubView(this, event)"
-            consumeanchor="zen-profile-button"
-            closemenu="none"
-            data-l10n-id="toolbar-button-account"
-            cui-areatype="toolbar"
-            badged="true"
-            removable="true">
-            <vbox>
-              <image id="zen-profile-button-icon" />
-            </vbox>
-          </toolbarbutton>
+          <toolbarbutton removable="true" class="toolbarbutton-1 zen-sidebar-action-button zen-compact-mode-ignore" id="zen-sidepanel-button" data-l10n-id="sidebar-zen-sidepanel" onclick="gZenBrowserManagerSidebar.toggle();"></toolbarbutton>
         </hbox>
       </toolbar>
     `);
@@ -97,11 +83,12 @@ export var ZenCustomizableUI = new (class {
   }
 
   _hideToolbarButtons(window) {
-    const elementsToHide = ['alltabs-button'];
+    const wrapper = window.document.getElementById('zen-sidebar-icons-wrapper');
+    const elementsToHide = ['alltabs-button', 'new-tab-button'];
     for (let id of elementsToHide) {
       const elem = window.document.getElementById(id);
       if (elem) {
-        elem.setAttribute('hidden', 'true');
+        wrapper.prepend(elem);
       }
     }
   }

src/browser/base/content/ZenStartup.mjs

@@ -35,6 +35,7 @@
         // Disable smooth scroll
         gBrowser.tabContainer.arrowScrollbox.smoothScroll = false;
 
+        gZenPinnedTabManager.initTabs();
         ZenWorkspaces.init();
         gZenUIManager.init();
         gZenVerticalTabsManager.init();
@@ -72,6 +73,7 @@
       const tabs = document.getElementById('tabbrowser-arrowscrollbox');
       tabs.style.maxHeight = '0px'; // reset to 0
       const toolbarRect = toolbarItems.getBoundingClientRect();
+      let height = toolbarRect.height;
       // -5 for the controls padding
       let totalHeight = toolbarRect.height - (this.contentElementSeparation * 2) - 5;
       // remove the height from other elements that aren't hidden
@@ -121,7 +123,7 @@
       }
 
       // remove all styles except for the width, since we are xulstoring the complet style list
-      const width = toolbox.style.width || '250px';
+      const width = toolbox.style.width || '270px';
       toolbox.removeAttribute('style');
       toolbox.style.width = width;
 

src/browser/base/content/ZenUIManager.mjs

@@ -47,7 +47,9 @@ var gZenUIManager = {
 
   onPopupShowing(showEvent) {
     for (const el of this._popupTrackingElements) {
-      if (!el.contains(event.explicitOriginalTarget)) {
+      // target may be inside a shadow root, not directly under the element
+      // we also ignore menus inside panels
+      if (!el.contains(showEvent.explicitOriginalTarget) || (showEvent.explicitOriginalTarget instanceof Element && showEvent.explicitOriginalTarget?.closest('panel'))) {
         continue;
       }
       document.removeEventListener('mousemove', this.__removeHasPopupAttribute);
@@ -115,7 +117,6 @@ var gZenVerticalTabsManager = {
     const onHover = Services.prefs.getBoolPref('zen.view.sidebar-expanded.on-hover');
     const expanded = Services.prefs.getBoolPref('zen.view.sidebar-expanded');
     const sidebar = this.navigatorToolbox;
-  
 
     if (onHover) {
       // if the sidebar is not expanded, and hover detection is enabled, show the sidebar

src/browser/base/content/browser-box-inc-xhtml.patch

@@ -1,21 +1,18 @@
 diff --git a/browser/base/content/browser-box.inc.xhtml b/browser/base/content/browser-box.inc.xhtml
-index 108160d9469d44f47c93a3808402e4b27ff59777..39a7b691302bf13e1b5990f46428cff6807a8e56 100644
+index 7f71abe7d80e4c09dd088517ec9ef106c7cb8654..281a3716d56edda243bfca7ebbe0797d75c844e7 100644
 --- a/browser/base/content/browser-box.inc.xhtml
 +++ b/browser/base/content/browser-box.inc.xhtml
-@@ -23,11 +23,16 @@
+@@ -22,7 +22,13 @@
+     <browser id="sidebar" autoscroll="false" disablehistory="true" disablefullscreen="true" tooltip="aHTMLTooltip"/>
    </vbox>
    <splitter id="sidebar-splitter" class="chromeclass-extrachrome sidebar-splitter" resizebefore="sibling" resizeafter="none" hidden="true"/>
-   <vbox id="appcontent" flex="1">
-+    <html:div id="zen-appcontent-navbar-container"></html:div>
-     <!-- gNotificationBox will be added here lazily. -->
-+    <hbox id="zen-tabbox-wrapper" flex="1">
-     <tabbox id="tabbrowser-tabbox"
-             flex="1" tabcontainer="tabbrowser-tabs">
-+#include zen-sidebar-panel.inc.xhtml
-+#include zen-splitview-overlay.inc.xhtml
-       <tabpanels id="tabbrowser-tabpanels"
-                   flex="1" selectedIndex="0"/>
-     </tabbox>
-+  </hbox>
-   </vbox>
++<vbox flex="1" id="zen-appcontent-wrapper">
++<html:div id="zen-appcontent-navbar-container"></html:div>
++<hbox id="zen-tabbox-wrapper" flex="1">
+   <tabbox id="tabbrowser-tabbox" flex="1" tabcontainer="tabbrowser-tabs">
++    #include zen-tabbrowser-elements.inc.xhtml
+     <tabpanels id="tabbrowser-tabpanels" flex="1" selectedIndex="0"/>
+   </tabbox>
  </hbox>
++</vbox>
++</hbox>

src/browser/base/content/browser-init-js.patch

@@ -1,11 +1,11 @@
 diff --git a/browser/base/content/browser-init.js b/browser/base/content/browser-init.js
-index bee5309c04775adff8652bfe6c54b2d466e821ac..cfeaf7cf2e98c35e76bdd5451f90b004a04d4474 100644
+index 9df41bb3c82919839ee1408aa4d177ea7ee40a56..e37c64fa2c2ea39762be4285a1a7055463ded537 100644
 --- a/browser/base/content/browser-init.js
 +++ b/browser/base/content/browser-init.js
-@@ -143,13 +143,15 @@ var gBrowserInit = {
-     gNavToolbox.palette = document.getElementById(
-       "BrowserToolbarPalette"
-     ).content;
+@@ -152,13 +152,15 @@ var gBrowserInit = {
+       // tell CUI to ignore this element when it builds the toolbar areas
+       elem.setAttribute("skipintoolbarset", "true");
+     }
 +    ZenCustomizableUI.init(window);
      for (let area of CustomizableUI.areas) {
        let type = CustomizableUI.getAreaType(area);
@@ -16,16 +16,16 @@ index bee5309c04775adff8652bfe6c54b2d466e821ac..cfeaf7cf2e98c35e76bdd5451f90b004
        }
      }
 +    ZenCustomizableUI.registerToolbarNodes(window);
-     BrowserSearch.initPlaceHolder();
- 
-     // Hack to ensure that the various initial pages favicon is loaded
-@@ -239,6 +241,10 @@ var gBrowserInit = {
+     for (let elem of nonRemovables) {
+       elem.setAttribute("removable", "false");
+       elem.removeAttribute("skipintoolbarset");
+@@ -253,6 +255,10 @@ var gBrowserInit = {
      gPrivateBrowsingUI.init();
      BrowserSearch.init();
      BrowserPageActions.init();
 +
-+    Services.scriptloader.loadSubScript("chrome://browser/content/ZenStartup.mjs", window);
-+    Services.scriptloader.loadSubScript("chrome://browser/content/zenThemeModifier.js", window);
++Services.scriptloader.loadSubScript("chrome://browser/content/ZenStartup.mjs", window);
++Services.scriptloader.loadSubScript("chrome://browser/content/zenThemeModifier.js", window);
 +
      if (gToolbarKeyNavEnabled) {
        ToolbarKeyboardNavigator.init();

src/browser/base/content/browser-js.patch

@@ -1,5 +1,5 @@
 diff --git a/browser/base/content/browser.js b/browser/base/content/browser.js
-index a29d7a84e84651ea0bdc9be8e4ac650bde2e048a..bc22e55a66686fbae95047686f845f71a0c3aae9 100644
+index ccd83c15d0d73a1e53bdbfdfbe6fed43a26c961d..f18a6abf7debb97539a4cdf8422315b4dff08adb 100644
 --- a/browser/base/content/browser.js
 +++ b/browser/base/content/browser.js
 @@ -32,6 +32,7 @@ ChromeUtils.defineESModuleGetters(this, {
@@ -10,7 +10,7 @@ index a29d7a84e84651ea0bdc9be8e4ac650bde2e048a..bc22e55a66686fbae95047686f845f71
    DevToolsSocketStatus:
      "resource://devtools/shared/security/DevToolsSocketStatus.sys.mjs",
    DownloadUtils: "resource://gre/modules/DownloadUtils.sys.mjs",
-@@ -629,6 +630,15 @@ XPCOMUtils.defineLazyPreferenceGetter(
+@@ -632,6 +633,15 @@ XPCOMUtils.defineLazyPreferenceGetter(
    false
  );
  
@@ -26,27 +26,19 @@ index a29d7a84e84651ea0bdc9be8e4ac650bde2e048a..bc22e55a66686fbae95047686f845f71
  customElements.setElementCreationCallback("screenshots-buttons", () => {
    Services.scriptloader.loadSubScript(
      "chrome://browser/content/screenshots/screenshots-buttons.js",
-@@ -3435,6 +3445,10 @@ var XULBrowserWindow = {
+@@ -3438,6 +3448,11 @@ var XULBrowserWindow = {
      AboutReaderParent.updateReaderButton(gBrowser.selectedBrowser);
      TranslationsParent.onLocationChange(gBrowser.selectedBrowser);
  
 +    gZenViewSplitter.onLocationChange(gBrowser.selectedBrowser);
 +    ZenWorkspaces.onLocationChange(gBrowser.selectedBrowser);
 +    gZenTabUnloader.onLocationChange(gBrowser.selectedBrowser);
++    gZenGlanceManager.onLocationChange(gBrowser.selectedBrowser);
 +
      PictureInPicture.updateUrlbarToggle(gBrowser.selectedBrowser);
  
      if (!gMultiProcessBrowser) {
-@@ -4769,7 +4783,7 @@ function setToolbarVisibility(
-       );
-     }
- 
--    const overlapAttr = "BookmarksToolbarOverlapsBrowser";
-+    const overlapAttr = "BookmarksToolbarOverlapsBrowser__ignore"; // Original string was "BookmarksToolbarOverlapsBrowser" but it's not used and it only bugs the UI.
-     switch (isVisible) {
-       case true:
-       case "always":
-@@ -7609,6 +7623,12 @@ var gDialogBox = {
+@@ -7289,6 +7304,12 @@ var gDialogBox = {
      parentElement.showModal();
      this._didOpenHTMLDialog = true;
  

src/browser/base/content/browser-places-js.patch

@@ -1,8 +1,8 @@
 diff --git a/browser/base/content/browser-places.js b/browser/base/content/browser-places.js
-index 6992d22069643b58b249ae16edfe354304e56a39..38a006799feb5f4f41e582074901bb7226397ae1 100644
+index 62b3665394a8256ebedf88a8f10bb6766977cf57..12ac643f913290b20fb7adba8f224f49bb82bf5c 100644
 --- a/browser/base/content/browser-places.js
 +++ b/browser/base/content/browser-places.js
-@@ -243,6 +243,8 @@ var StarUI = {
+@@ -252,6 +252,8 @@ var StarUI = {
        });
      }
  
@@ -11,7 +11,7 @@ index 6992d22069643b58b249ae16edfe354304e56a39..38a006799feb5f4f41e582074901bb72
      let onPanelReady = fn => {
        let target = this.panel;
        if (target.parentNode) {
-@@ -294,6 +296,21 @@ var StarUI = {
+@@ -303,6 +305,21 @@ var StarUI = {
      }
    },
  

src/browser/base/content/navigator-toolbox-inc-xhtml.patch

@@ -1,5 +1,5 @@
 diff --git a/browser/base/content/navigator-toolbox.inc.xhtml b/browser/base/content/navigator-toolbox.inc.xhtml
-index 18b91c95b88d11ddb257de03f12bc3e4cc75a96a..f117cfa7c9d1f9eb537cebbef42a9d2d945d53ac 100644
+index 12fa0cf79aade28581016adf96df85386dabdcef..846add9b040abf0f7378ebaaadef007013f5a1ec 100644
 --- a/browser/base/content/navigator-toolbox.inc.xhtml
 +++ b/browser/base/content/navigator-toolbox.inc.xhtml
 @@ -2,7 +2,7 @@
@@ -11,7 +11,7 @@ index 18b91c95b88d11ddb257de03f12bc3e4cc75a96a..f117cfa7c9d1f9eb537cebbef42a9d2d
  
    <vbox id="titlebar">
      <!-- Menu -->
-@@ -32,10 +32,11 @@
+@@ -32,13 +32,14 @@
  
        <hbox class="titlebar-spacer" type="pre-tabs"/>
  
@@ -20,11 +20,14 @@ index 18b91c95b88d11ddb257de03f12bc3e4cc75a96a..f117cfa7c9d1f9eb537cebbef42a9d2d
          <toolbartabstop/>
          <hbox id="TabsToolbar-customization-target" flex="1">
            <toolbarbutton id="firefox-view-button"
-+                        hidden="true"
                           class="toolbarbutton-1 chromeclass-toolbar-additional"
                           data-l10n-id="toolbar-button-firefox-view-2"
                           role="button"
-@@ -50,7 +51,7 @@
++                         hidden="true"
+                          aria-pressed="false"
+                          oncommand="FirefoxViewHandler.openTab();"
+                          onmousedown="FirefoxViewHandler.openToolbarMouseEvent(event);"
+@@ -50,16 +51,21 @@
                  aria-multiselectable="true"
                  setfocus="false"
                  tooltip="tabbrowser-tab-tooltip"
@@ -33,16 +36,22 @@ index 18b91c95b88d11ddb257de03f12bc3e4cc75a96a..f117cfa7c9d1f9eb537cebbef42a9d2d
                  stopwatchid="FX_TAB_CLICK_MS">
              <hbox class="tab-drop-indicator" hidden="true"/>
  # If the name (tabbrowser-arrowscrollbox) or structure of this changes
-@@ -66,7 +67,7 @@
-                                   tooltip="dynamic-shortcut-tooltip"
-                                   data-l10n-id="tabs-toolbar-new-tab"/>
-             </html:div>
--            <arrowscrollbox id="tabbrowser-arrowscrollbox" orient="horizontal" flex="1" style="min-width: 1px;" clicktoscroll="" scrolledtostart="" scrolledtoend="">
-+            <arrowscrollbox id="tabbrowser-arrowscrollbox" orient="vertical" style="min-width: 1px;" clicktoscroll="" scrolledtostart="" scrolledtoend="">
+ # significantly, there is an optimization in
+ # DisplayPortUtils::MaybeCreateDisplayPortInFirstScrollFrameEncountered based
+ # the current structure that we may want to revisit.
++            <html:div id="zen-essentials-container"></html:div>
++            <hbox id="zen-current-workspace-indicator">
++              <hbox id="zen-current-workspace-indicator-icon"></hbox>
++              <hbox id="zen-current-workspace-indicator-name"></hbox>
++            </hbox>
+             <html:div id="vertical-pinned-tabs-container"></html:div>
+             <html:div id="vertical-pinned-tabs-container-separator"></html:div>
+-            <arrowscrollbox id="tabbrowser-arrowscrollbox" orient="horizontal" flex="1" clicktoscroll="" scrolledtostart="" scrolledtoend="">
++            <arrowscrollbox id="tabbrowser-arrowscrollbox" orient="vertical" flex="1" clicktoscroll="" scrolledtostart="" scrolledtoend="">
                <tab is="tabbrowser-tab" class="tabbrowser-tab" selected="true" visuallyselected="" fadein=""/>
                <hbox id="tabbrowser-arrowscrollbox-periphery">
                  <toolbartabstop/>
-@@ -113,9 +114,10 @@
+@@ -113,9 +119,10 @@
        <toolbarbutton id="content-analysis-indicator"
                       oncommand="ContentAnalysis.showPanel(this, PanelUI);"
                       class="toolbarbutton-1 content-analysis-indicator-icon"/>
@@ -55,15 +64,7 @@ index 18b91c95b88d11ddb257de03f12bc3e4cc75a96a..f117cfa7c9d1f9eb537cebbef42a9d2d
      </toolbar>
  
    </vbox>
-@@ -471,6 +473,7 @@
- 
-       <toolbarbutton id="fxa-toolbar-menu-button" class="toolbarbutton-1 chromeclass-toolbar-additional subviewbutton-nav"
-                      badged="true"
-+                     hidden="true"
-                      delegatesanchor="true"
-                      onmousedown="gSync.toggleAccountPanel(this, event)"
-                      onkeypress="gSync.toggleAccountPanel(this, event)"
-@@ -522,6 +525,7 @@
+@@ -531,6 +538,7 @@
                       consumeanchor="PanelUI-button"
                       data-l10n-id="appmenu-menu-button-closed2"/>
      </toolbaritem>

src/browser/base/content/nsContextMenu-sys-mjs.patch

@@ -1,8 +1,8 @@
 diff --git a/browser/base/content/nsContextMenu.sys.mjs b/browser/base/content/nsContextMenu.sys.mjs
-index 6c2317b8036378c6b8e0ad9a4fe71388bcb385f5..4bf277b02d3c69efc0f2d46c8b0f9deb7d7fb45a 100644
+index 7f3dc585937c5ac96c0d09a786515305afb4fe1a..9216931e7d805743f0b00e74039be042456e63f3 100644
 --- a/browser/base/content/nsContextMenu.sys.mjs
 +++ b/browser/base/content/nsContextMenu.sys.mjs
-@@ -1153,6 +1153,13 @@ export class nsContextMenu {
+@@ -1047,6 +1047,13 @@ export class nsContextMenu {
          !this.isSecureAboutPage()
      );
  
@@ -13,6 +13,6 @@ index 6c2317b8036378c6b8e0ad9a4fe71388bcb385f5..4bf277b02d3c69efc0f2d46c8b0f9deb
 +
 +    this.showItem("context-zenSplitLink", this.onLink && !this.onMailtoLink && !this.onTelLink);
 +
-     let copyLinkSeparator = this.document.getElementById(
-       "context-sep-copylink"
-     );
+     let canNotStrip =
+       lazy.STRIP_ON_SHARE_CAN_DISABLE && !this.#canStripParams();
+ 

src/browser/base/content/zen-assets.inc.xhtml

@@ -16,23 +16,27 @@
 <link rel="stylesheet" type="text/css" href="chrome://browser/content/zen-styles/zen-urlbar.css" />
 <link rel="stylesheet" type="text/css" href="chrome://browser/content/zen-styles/zen-workspaces.css" />
 <link rel="stylesheet" type="text/css" href="chrome://browser/content/zen-styles/zen-decks.css" />
+<link rel="stylesheet" type="text/css" href="chrome://browser/content/zen-styles/zen-glance.css" />
 <link rel="stylesheet" type="text/css" href="chrome://browser/content/zen-styles/zen-profile-dialog.css" />
 <link rel="stylesheet" type="text/css" href="chrome://browser/content/zen-styles/zen-sidebar-panels.css" />
 <link rel="stylesheet" type="text/css" href="chrome://browser/content/zen-styles/zen-popup.css" />
 
 <link rel="stylesheet" type="text/css" href="chrome://browser/content/zen-styles/zen-compact-mode.css" />
 <link rel="stylesheet" type="text/css" href="chrome://browser/skin/zen-icons/icons.css" />
-
 </linkset>
 
 <!-- Scripts used all over the browser -->
 <script src="chrome://browser/content/zen-components/ZenThemesCommon.mjs" />
+<script src="chrome://browser/content/zen-components/ZenActorsManager.mjs" />
+<script src="chrome://browser/content/zen-components/ZenGlanceManager.mjs" />
 <script src="chrome://browser/content/zen-components/ZenThemesImporter.mjs" />
 <script src="chrome://browser/content/zen-components/ZenCompactMode.mjs" />
 <script src="chrome://browser/content/ZenUIManager.mjs" />
 <script src="chrome://browser/content/zen-components/ZenSidebarManager.mjs"/>
 <script src="chrome://browser/content/zen-components/ZenTabUnloader.mjs" />
 <script src="chrome://browser/content/zen-components/ZenWorkspaces.mjs" />
+<script src="chrome://browser/content/zen-components/ZenPinnedTabsStorage.mjs" />
+<script src="chrome://browser/content/zen-components/ZenPinnedTabManager.mjs" />
 <script src="chrome://browser/content/zen-components/ZenWorkspacesStorage.mjs" />
 <script src="chrome://browser/content/zen-components/ZenWorkspacesSync.mjs" />
 <script src="chrome://browser/content/zen-components/ZenGradientGenerator.mjs" />

src/browser/base/content/zen-assets.jar.inc.mn

@@ -4,21 +4,24 @@
         content/browser/ZenStartup.mjs                          (content/ZenStartup.mjs)
         content/browser/ZenUIManager.mjs                        (content/ZenUIManager.mjs)
         content/browser/ZenCustomizableUI.sys.mjs               (content/ZenCustomizableUI.sys.mjs)
-        content/browser/zen-components/ZenCompactMode.mjs       (content/zen-components/src/ZenCompactMode.mjs)
-        content/browser/zen-components/ZenViewSplitter.mjs      (content/zen-components/src/ZenViewSplitter.mjs)
-        content/browser/zen-components/ZenThemesCommon.mjs      (content/zen-components/src/ZenThemesCommon.mjs)
-        content/browser/zen-components/ZenWorkspaces.mjs        (content/zen-components/src/ZenWorkspaces.mjs)
-        content/browser/zen-components/ZenWorkspacesStorage.mjs (content/zen-components/src/ZenWorkspacesStorage.mjs)
-        content/browser/zen-components/ZenWorkspacesSync.mjs    (content/zen-components/src/ZenWorkspacesSync.mjs)
-        content/browser/zen-components/ZenSidebarManager.mjs    (content/zen-components/src/ZenSidebarManager.mjs)
-        content/browser/zen-components/ZenProfileDialogUI.mjs   (content/zen-components/src/ZenProfileDialogUI.mjs)
-        content/browser/zen-components/ZenKeyboardShortcuts.mjs (content/zen-components/src/ZenKeyboardShortcuts.mjs)
-        content/browser/zen-components/ZenThemeBuilder.mjs      (content/zen-components/src/ZenThemeBuilder.mjs)
-        content/browser/zen-components/ZenThemesImporter.mjs    (content/zen-components/src/ZenThemesImporter.mjs)
-        content/browser/zen-components/ZenTabUnloader.mjs       (content/zen-components/src/ZenTabUnloader.mjs)
-        content/browser/zen-components/ZenPinnedTabManager.mjs  (content/zen-components/src/ZenPinnedTabManager.mjs)
-        content/browser/zen-components/ZenCommonUtils.mjs       (content/zen-components/src/ZenCommonUtils.mjs)
-        content/browser/zen-components/ZenGradientGenerator.mjs (content/zen-components/src/ZenGradientGenerator.mjs)
+        content/browser/zen-components/ZenCompactMode.mjs       (zen-components/ZenCompactMode.mjs)
+        content/browser/zen-components/ZenViewSplitter.mjs      (zen-components/ZenViewSplitter.mjs)
+        content/browser/zen-components/ZenThemesCommon.mjs      (zen-components/ZenThemesCommon.mjs)
+        content/browser/zen-components/ZenWorkspaces.mjs        (zen-components/ZenWorkspaces.mjs)
+        content/browser/zen-components/ZenWorkspacesStorage.mjs (zen-components/ZenWorkspacesStorage.mjs)
+        content/browser/zen-components/ZenWorkspacesSync.mjs    (zen-components/ZenWorkspacesSync.mjs)
+        content/browser/zen-components/ZenSidebarManager.mjs    (zen-components/ZenSidebarManager.mjs)
+        content/browser/zen-components/ZenProfileDialogUI.mjs   (zen-components/ZenProfileDialogUI.mjs)
+        content/browser/zen-components/ZenKeyboardShortcuts.mjs (zen-components/ZenKeyboardShortcuts.mjs)
+        content/browser/zen-components/ZenThemeBuilder.mjs      (zen-components/ZenThemeBuilder.mjs)
+        content/browser/zen-components/ZenThemesImporter.mjs    (zen-components/ZenThemesImporter.mjs)
+        content/browser/zen-components/ZenTabUnloader.mjs       (zen-components/ZenTabUnloader.mjs)
+        content/browser/zen-components/ZenPinnedTabsStorage.mjs (zen-components/ZenPinnedTabsStorage.mjs)
+        content/browser/zen-components/ZenPinnedTabManager.mjs  (zen-components/ZenPinnedTabManager.mjs)
+        content/browser/zen-components/ZenCommonUtils.mjs       (zen-components/ZenCommonUtils.mjs)
+        content/browser/zen-components/ZenGradientGenerator.mjs (zen-components/ZenGradientGenerator.mjs)
+        content/browser/zen-components/ZenGlanceManager.mjs     (zen-components/ZenGlanceManager.mjs)
+        content/browser/zen-components/ZenActorsManager.mjs     (zen-components/ZenActorsManager.mjs)
 
         content/browser/zen-styles/zen-theme.css                (content/zen-styles/zen-theme.css)
         content/browser/zen-styles/zen-buttons.css              (content/zen-styles/zen-buttons.css)
@@ -32,6 +35,7 @@
         content/browser/zen-styles/zen-sidebar.css              (content/zen-styles/zen-sidebar.css)
         content/browser/zen-styles/zen-toolbar.css              (content/zen-styles/zen-toolbar.css)
         content/browser/zen-styles/zen-decks.css                (content/zen-styles/zen-decks.css)
+        content/browser/zen-styles/zen-glance.css               (content/zen-styles/zen-glance.css)
         content/browser/zen-styles/zen-browser-container.css    (content/zen-styles/zen-browser-container.css)
         content/browser/zen-styles/zen-workspaces.css           (content/zen-styles/zen-workspaces.css)
         content/browser/zen-styles/zen-profile-dialog.css       (content/zen-styles/zen-profile-dialog.css)
@@ -52,5 +56,7 @@
         content/browser/zen-images/gradient-display.png         (content/zen-images/gradient-display.png)
 
         # Actors
-        content/browser/zen-components/actors/ZenThemeMarketplaceParent.sys.mjs (content/zen-components/src/actors/ZenThemeMarketplaceParent.sys.mjs)
-        content/browser/zen-components/actors/ZenThemeMarketplaceChild.sys.mjs  (content/zen-components/src/actors/ZenThemeMarketplaceChild.sys.mjs)
+        content/browser/zen-components/actors/ZenThemeMarketplaceParent.sys.mjs (zen-components/actors/ZenThemeMarketplaceParent.sys.mjs)
+        content/browser/zen-components/actors/ZenThemeMarketplaceChild.sys.mjs  (zen-components/actors/ZenThemeMarketplaceChild.sys.mjs)
+        content/browser/zen-components/actors/ZenGlanceChild.sys.mjs            (zen-components/actors/ZenGlanceChild.sys.mjs)
+        content/browser/zen-components/actors/ZenGlanceParent.sys.mjs           (zen-components/actors/ZenGlanceParent.sys.mjs)

src/browser/base/content/zen-glance.inc.xhtml

@@ -0,0 +1,4 @@
+<vbox id="zen-glance-sidebar-container">
+  <toolbarbutton id="zen-glance-sidebar-close" class="toolbarbutton-1" oncommand="gZenGlanceManager.closeGlance()"/>
+  <toolbarbutton id="zen-glance-sidebar-open" class="toolbarbutton-1" oncommand="gZenGlanceManager.fullyOpenGlance()"/>
+</vbox>

src/browser/base/content/zen-preloaded.inc.xhtml

@@ -4,5 +4,4 @@
 <script type="text/javascript">
   Services.scriptloader.loadSubScript("chrome://browser/content/zen-components/ZenCommonUtils.mjs", this);
   Services.scriptloader.loadSubScript("chrome://browser/content/zen-components/ZenKeyboardShortcuts.mjs", this);
-  Services.scriptloader.loadSubScript("chrome://browser/content/zen-components/ZenPinnedTabManager.mjs", this);
 </script>

src/browser/base/content/zen-sidebar-icons.inc.xhtml

@@ -7,5 +7,19 @@
   skipintoolbarset="true"
   context="toolbar-context-menu"
   mode="icons">
-  <toolbarbutton removeable="true" class="toolbarbutton-1 zen-sidebar-action-button" id="zen-sidepanel-button" data-l10n-id="sidebar-zen-sidepanel" onclick="gZenBrowserManagerSidebar.toggle();"></toolbarbutton>
+  <toolbarbutton id="zen-profile-button" 
+    class="zen-sidebar-action-button toolbarbutton-1 chromeclass-toolbar-additional"
+    delegatesanchor="true"
+    onmousedown="ZenProfileDialogUI.showSubView(this, event)"
+    onkeypress="ZenProfileDialogUI.showSubView(this, event)"
+    consumeanchor="zen-profile-button"
+    closemenu="none"
+    data-l10n-id="toolbar-button-account"
+    cui-areatype="toolbar"
+    badged="true"
+    removable="true">
+    <vbox>
+      <image id="zen-profile-button-icon" />
+    </vbox>
+  </toolbarbutton>
 </toolbar>

src/browser/base/content/zen-styles/zen-animations.css

@@ -213,3 +213,121 @@
     right: -2px;
   }
 }
+
+/* Mark: Zen Glance */
+@keyframes zen-glance-overlay-animation {
+  from {
+    opacity: 0;
+    transform: scale(0.8);
+  }
+
+  to {
+    opacity: 1;
+    transform: scale(1);
+  }
+}
+
+@keyframes zen-glance-overlay-animation-out {
+  from {
+    opacity: 1;
+  }
+
+  to {
+    opacity: 0;
+  }
+}
+
+@keyframes zen-glance-content-animation {
+  /* make the box appear from initial width/height and x/y coordinates */
+  0% {
+    opacity: 1;
+  }
+
+  30% {
+    top: 50%;
+    left: 50%;
+    transform: translate(-50%, -50%) translateZ(0);
+  }
+
+  70% {
+    /* make the box grow to full width/height */
+    opacity: 1;
+    transform: translate(-50%, -50%) translateZ(0);
+    top: 50%;
+    left: 50%;
+    width: 87%;
+    height: calc(102% + 10px);
+  }
+
+  100% {
+    /* make the box shrink to final width/height and x/y coordinates */
+    transform: translate(-50%, -50%) translateZ(0);
+    opacity: 1;
+    width: 85%;
+    height: calc(100% + 10px);
+    top: 50%;
+    left: 50%;
+  }
+}
+
+@keyframes zen-glance-content-animation-out {
+  0% {
+    border: none;
+  }
+
+  100% {
+    transform: translate(-50%, -50%);
+    opacity: 1;
+    width: 85%;
+    height: calc(100% + 10px);
+    top: 50%;
+    left: 50%;
+  }
+}
+
+@keyframes zen-glance-buttons-animation-full {
+  from {
+    width: 85%;
+    height: 85%;
+    top: 50%;
+    left: 50%;
+    transform: translate(-50%, -50%);
+  }
+
+  to {
+    width: 100%;
+    height: 100%;
+    top: 0;
+    left: 0;
+    opacity: 1;
+    transform: none;
+  }
+}
+
+@keyframes zen-glance-loading-animation {
+  0% {
+    opacity: 1;
+    width: 80%;
+  }
+
+  90% {
+    width: 100%; 
+  }
+
+  100% {
+    opacity: 0;
+  }
+}
+
+@keyframes zen-glance-buttons-animation {
+  from {
+    right: 0;
+    opacity: 0;
+    width: fit-content;
+  }
+
+  to {
+    opacity: 1;
+    transform: translateX(-100%) translateY(-50%);
+  }
+}

src/browser/base/content/zen-styles/zen-browser-container.css

@@ -4,16 +4,19 @@
     border-radius: var(--zen-webview-border-radius, var(--zen-border-radius));
     position: relative;
 
-    box-shadow: 0 0 1px 1px light-dark(rgba(0, 0, 0, 0.1), var(--zen-colors-border));
+    box-shadow: 0 0 1px 1px light-dark(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.5));
+    
     & .browserContainer {
       overflow: hidden;
       border-radius: var(--zen-webview-border-radius, var(--zen-border-radius));
     }
+  }
 
-    @media (-moz-bool-pref: 'zen.view.experimental-rounded-view') {
-      &.deck-selected .browserContainer {
-        mix-blend-mode: multiply;
-      }
+  @media (-moz-bool-pref: 'zen.view.experimental-rounded-view') {
+    #tabbrowser-tabpanels {
+      mix-blend-mode: multiply;
+      -moz-osx-font-smoothing: grayscale;
+      isolation: isolate;
     }
   }
 }

src/browser/base/content/zen-styles/zen-browser-ui.css

@@ -1,5 +1,4 @@
-#browser,
-#appcontent,
+
 #tabbrowser-tabpanels {
   background: transparent !important;
 }
@@ -14,6 +13,7 @@
   & #tabbrowser-tabpanels {
     padding-right: var(--zen-element-separation);
     padding-bottom: var(--zen-element-separation);
+    padding-left: 1px; /* Shadow offset */
 
     #browser:has(#navigator-toolbox[zen-right-side='true']) & {
       padding-right: 0;
@@ -31,17 +31,40 @@
 
 #browser {
   width: 100%;
+  background: var(--zen-main-browser-background);
+
+  &::before {
+    content: '';
+    position: fixed;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background-image: url(data:image/png;base64,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);
+    pointer-events: none;
+    z-index: 0;
+    opacity: var(--zen-grainy-background-opacity, 0);
+  }
 }
 
-:root:not([inDOMFullscreen='true']) #appcontent,
 #sidebar-box {
   /** Sidebar is already hidden in full screen mode */
   border: none;
 }
 
-#zen-main-app-wrapper {
-  background: var(--zen-main-browser-background);
 
+@supports (-moz-osx-font-smoothing: auto) {
+  #zen-main-app-wrapper,
+  #zen-appcontent-wrapper,
+  #zen-sidebar-splitter {
+    appearance: -moz-window-titlebar !important;
+  }
+}
+
+#zen-main-app-wrapper {
+  background: transparent;
+  overflow: hidden;
+  
   & > * {
     z-index: 1;
   }
@@ -59,22 +82,14 @@
       animation: zen-main-app-wrapper-animation .5s ease-in-out forwards;
       border-radius: env(-moz-gtk-csd-titlebar-radius);
     }
-
-    &::after {
-      content: '';
-      position: fixed;
-      top: 0;
-      left: 0;
-      right: 0;
-      bottom: 0;
-      background-image: url(data:image/png;base64,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);
-      pointer-events: none;
-      z-index: 0;
-      opacity: var(--zen-grainy-background-opacity, 0);
-    }
   }
 }
 
+#zen-appcontent-wrapper {
+  max-width: 100%;
+  overflow-x: hidden;
+}
+
 #tabbrowser-tabbox {
   display: flex;
   flex-direction: row;
@@ -85,6 +100,8 @@
   height: 100%;
 }
 
-:root:not([inDOMFullscreen='true']) #tabbrowser-tabbox {
-  padding: 2px; /* To allow the web view's shadow to be visible */
+@media (-moz-platform: macos) {
+  .titlebar-buttonbox-container {
+    margin-inline-end: 8px;
+  }
 }

src/browser/base/content/zen-styles/zen-buttons.css

@@ -16,10 +16,13 @@ xul|button {
   transition: 0.1s;
   min-width: 100px !important;
   font-weight: 500 !important;
+
+  border: 1px solid var(--zen-colors-border);
+  box-shadow: 0 0 1px 1px rgba(0, 0, 0, 0.05) !important;
 }
 
-button:active {
-  transform: scale(0.95);
+button:not(#zen-workspaces-button):active {
+  transform: scale(0.98);
 }
 
 html|button:not(:is(.tab-button, .ghost-button, .button-toggle, .button-edit, .button-add, )),

src/browser/base/content/zen-styles/zen-compact-mode.css

@@ -28,7 +28,7 @@
 
       #navigator-toolbox {
         --zen-toolbox-max-width: 54px !important;
-        --zen-compact-float: calc(var(--zen-element-separation) + 1px);
+        --zen-compact-float: calc(var(--zen-element-separation) - 1px);
         position: absolute;
         z-index: 9;
         transition: transform 0.2s ease-in-out, opacity 0.2s ease-in-out;
@@ -41,6 +41,7 @@
         padding-top: 0 !important;
 
         #browser:has(#navigator-toolbox[zen-right-side='true']) & {
+          --zen-compact-float: calc(var(--zen-element-separation) + 1px);
           padding-left: unset !important;
           padding-right: var(--zen-compact-float) !important;
           left: calc(100% - var(--zen-element-separation));
@@ -49,13 +50,19 @@
       }
 
       #titlebar {
-        background: var(--zen-main-browser-background) !important;
-        background-attachment: fixed !important;
-        background-size: 2000px !important; /* Dont ask me why */
-        box-shadow: 0 0 1px 1px rgba(0, 0, 0, 0.2);
-        border-radius: calc(var(--zen-border-radius) + 2px);
+        box-shadow: 0 0 2px 2px rgba(0, 0, 0, 0.1);
+        border-radius: calc(var(--zen-border-radius) - 2px);
         padding: var(--zen-toolbox-padding) !important;
         position: relative;
+        background: var(--zen-dialog-background);
+        outline: 1px solid light-dark(rgba(0, 0, 0, 0.1), rgba(255, 255, 255, 0.1));
+
+        @media (-moz-bool-pref: 'zen.view.compact.color-sidebar') {
+          background: var(--zen-main-browser-background-toolbar) !important;
+          background-attachment: fixed !important;
+          background-size: 2000px !important; /* Dont ask me why */
+          backdrop-filter: blur(5px) !important;
+        }
       }
       /* Mark: toolbox as collapsed */
       #zen-tabbox-wrapper > #navigator-toolbox:not(#navigator-toolbox:is(#navigator-toolbox[zen-expanded='true'])) {
@@ -83,7 +90,7 @@
       #navigator-toolbox[movingtab],
       #mainPopupSet:has(> #appMenu-popup:hover) ~ toolbox,
       #navigator-toolbox:has(.tabbrowser-tab:active),
-      #navigator-toolbox:has(*[open='true']:not(tab):not(#zen-sidepanel-button)) {
+      #navigator-toolbox:has(*[open='true']:not(tab):not(.zen-compact-mode-ignore)) {
         opacity: 1;
 
         transform: translateX(calc(100% - var(--zen-element-separation)));
@@ -112,26 +119,26 @@
       }
 
       #zen-appcontent-navbar-container {
+        --zen-compact-toolbar-offset: 5px;
         position: absolute;
         top: 0;
         transform: translateY(calc(-100% + var(--zen-element-separation) + 1px));
         left: 0;
         z-index: 10;
-        background: var(--zen-themed-toolbar-bg);
-        box-shadow: 0 0 2px 2px rgba(0, 0, 0, 0.1) !important;
+        box-shadow: 0 0 1px 1px rgba(0, 0, 0, 0.3) !important;
         border-bottom-left-radius: var(--zen-border-radius);
         border-bottom-right-radius: var(--zen-border-radius);
-        border: 1px solid var(--zen-colors-border);
-        border-top-width: 0px;
         transition: all 0.1s ease-in-out;
         width: 100%;
         opacity: 0;
+        background: var(--zen-dialog-background);
 
-        :root[tabsintitlebar][sizemode='normal']:not([gtktiledwindow='true']) & {
-          border-top-left-radius: env(-moz-gtk-csd-titlebar-radius);
-          border-top-right-radius: env(-moz-gtk-csd-titlebar-radius);
-          border-left-width: 0;
-          border-right-width: 0;
+        @media (-moz-bool-pref: 'zen.view.compact.color-toolbar') {
+          background-attachment: fixed;
+          backdrop-filter: blur(5px);
+          background: var(--zen-main-browser-background-toolbar);
+          background-size: 100% 2000px;
+          border-bottom: 1px solid var(--zen-colors-border);
         }
       }
 

src/browser/base/content/zen-styles/zen-decks.css

@@ -27,7 +27,7 @@
 
 #tabbrowser-tabpanels[zen-split-view='true'] > [zen-split='true'], #zen-splitview-dropzone {
   flex: 1;
-  margin: calc(var(--zen-split-column-gap) / 2) calc(var(--zen-split-row-gap) / 2);
+  margin: calc(var(--zen-split-column-gap) / 2) calc(var(--zen-split-row-gap) / 2 + 1px);
   position: absolute !important;
   overflow: hidden;
 }
@@ -45,10 +45,11 @@
 
 #tabbrowser-tabpanels[zen-split-view='true'] .browserSidebarContainer.deck-selected {
   outline: 2px solid var(--zen-primary-color) !important;
+  outline-offset: -1px;
 }
 
 #tabbrowser-tabbox {
-  --zen-split-row-gap: calc(var(--zen-element-separation) + 2px);
+  --zen-split-row-gap: calc(var(--zen-element-separation) + 1px);
   --zen-split-column-gap: calc(var(--zen-element-separation) + 1px);
 }
 
@@ -99,21 +100,22 @@
 
 .zen-split-view-splitter {
   visibility: inherit;
-  cursor: ew-resize;
   -moz-subtree-hidden-only-visually: 0;
   position: absolute;
   pointer-events: all;
 }
 
+
 .zen-split-view-splitter[orient='vertical'] {
   width: var(--zen-split-row-gap);
   margin-left: calc(var(--zen-split-row-gap) / -2);
+  cursor: ew-resize;
 }
 
 .zen-split-view-splitter[orient='horizontal'] {
   height: var(--zen-split-column-gap);
   margin-top: calc(var(--zen-split-column-gap) / -2);
-  cursor: n-resize;
+  cursor: ns-resize;
 }
 
 #zen-split-views-box:not([hidden='true']) {

src/browser/base/content/zen-styles/zen-glance.css

@@ -0,0 +1,142 @@
+
+.browserSidebarContainer:has([zen-glance-selected]),
+.browserSidebarContainer.zen-glance-overlay {
+  visibility: inherit;
+}
+
+#tabbrowser-tabpanels {
+  transition: transform 0.1s ease-in-out;
+}
+
+#tabbrowser-tabpanels:has(.zen-glance-background) {
+  transform: scale(0.98);
+  backdrop-filter: blur(5px);
+
+  & .zen-glance-background {
+    opacity: 0.6;
+    transition: opacity 0.1s ease-in-out;
+  }
+}
+
+#zen-glance-sidebar-container {
+  display: none;
+
+  & toolbarbutton:hover {
+    background: var(--button-background-color-hover);
+  }
+}
+
+.browserSidebarContainer.zen-glance-overlay {
+  &[fade-out='true'] {
+    background: transparent;
+    opacity: 1;
+
+    & .browserContainer {
+      opacity: 1 !important;
+      animation: zen-glance-content-animation-out .3s ease-out forwards !important;
+      animation-direction: reverse !important;
+
+      & browser {
+        opacity: 0;
+        transition: opacity .1s ease-in-out;
+      }
+
+      & #zen-glance-sidebar-container {
+        opacity: 0;
+        transition: opacity .1s ease-in-out;
+      }
+    }
+  }
+
+  & .browserContainer {
+    background: var(--zen-dialog-background);
+    box-shadow: 0 0 1px 1px rgba(0, 0, 0, 0.2);
+    transform: translate(var(--initial-x), var(--initial-y));
+    width: var(--initial-width);
+    height: var(--initial-height);
+    position: absolute;
+    border-radius: var(--zen-border-radius);
+    opacity: 0;
+    top: 0;
+    left: 0;
+    flex: unset !important;
+    border: 1px solid var(--zen-colors-border);
+
+    &[has-finished-animation='true'] {
+      position: relative !important;
+      transition: 0s !important;
+      transform: none !important;
+      margin: auto !important;
+      top: -5px !important;
+      left: 0 !important;
+    }
+
+    & #zen-glance-sidebar-container {
+      position: fixed;
+      display: flex;
+      top: 10%;
+      left: 0;
+      transform: translateY(-50%);
+      opacity: 0;
+      background: var(--zen-dialog-background);
+
+      border: 1px solid var(--zen-colors-border);
+      border-right: none;
+
+      border-top-left-radius: var(--zen-border-radius);
+      border-bottom-left-radius: var(--zen-border-radius);
+
+      padding: 5px;
+      gap: 6px;
+
+      animation: zen-glance-buttons-animation 0.2s ease-in-out forwards;
+      animation-delay: 0.3s;
+
+      & toolbarbutton {
+        width: 32px;
+        height: 32px;
+
+        & label {
+          display: none;
+        }
+      }
+    }
+
+    & browser {
+      width: 100%;
+      height: 100%;
+      opacity: 1;
+      transition: opacity 0.2s ease-in-out;
+      transition-delay: 0.1s;
+    }
+
+    &[animate-full='true'] {
+      opacity: 1;
+      animation: zen-glance-buttons-animation-full 0.2s ease-in-out forwards !important;
+
+      & #zen-glance-sidebar-container {
+        opacity: 0 !important;
+      }
+    }
+
+    &[animate='true'] {
+      animation: zen-glance-content-animation .3s ease-in-out forwards;
+      animation-delay: 0.1s;
+
+      &:not([animate-end='true']) {
+        pointer-events: none;
+
+        & browser {
+          opacity: 0;
+          visibility: hidden;
+        }
+
+        & #zen-glance-sidebar-container {
+          opacity: 0;
+          animation: none;
+          pointer-events: none;
+        }
+      }
+    }
+  }
+}

src/browser/base/content/zen-styles/zen-panel-ui.css

@@ -1,7 +1,7 @@
-panel[type='arrow'][animate][animate='open'] {
-  animation: zen-jello-animation 0.2s ease-in-out;
+panel[type='arrow'][animate][animate='open']::part(content) {
+  animation: zen-jello-animation 0.3s ease-in-out;
 }
 
-panel[type='arrow'][animate]:not([animate='open']) {
-  animation: zen-jello-out-animation 0.2s ease-in-out;
+panel[type='arrow'][animate]:not([animate='open'])::part(content) {
+  animation: zen-jello-out-animation 0.3s ease-in-out;
 }

src/browser/base/content/zen-styles/zen-profile-dialog.css

@@ -5,7 +5,7 @@
 }
 
 #PanelUI-zen-profiles-header {
-  width: 280px;
+  width: 100%;
   height: 130px;
   background: color-mix(in srgb, var(--zen-primary-color) 80%, white 20%);
   position: relative;

src/browser/base/content/zen-styles/zen-sidebar.css

@@ -21,14 +21,15 @@
   }
 
   & #zen-profile-button-icon {
-    width: 16px;
-    height: 16px;
+    width: 20px;
+    height: 20px;
     list-style-image: var(--avatar-image-url);
     border-radius: 50%;
     pointer-events: none;
     list-style-image: var(--avatar-image-url);
     -moz-context-properties: fill;
     fill: currentColor;
+    border: 1px solid var(--zen-colors-border);
   }
 }
 
@@ -72,4 +73,4 @@
 /* Menubar */
 #toolbar-menubar {
   display: none !important;
-}
+}

src/browser/base/content/zen-styles/zen-single-components.css

@@ -9,6 +9,7 @@
 /* Watermark */
 
 #zen-watermark {
+  --zen-themed-toolbar-bg-transparency: 1 !important;
   position: absolute;
   top: 0;
   left: 0;

src/browser/base/content/zen-styles/zen-tabs/vertical-tabs.css

@@ -16,7 +16,19 @@
   }
 
   #browser {
-    --zen-toolbox-padding: 5px;
+    --zen-toolbox-padding: calc(var(--zen-element-separation) / 1.5);
+  }
+
+  #vertical-pinned-tabs-container-separator {
+    background: light-dark(rgba(1, 1, 1, 0.075), rgba(255, 255, 255, 0.1));
+    margin: 8px auto;
+    border: none;
+    height: 1px;
+    width: 98%;
+
+    #vertical-pinned-tabs-container:not(:has(tab:not([hidden]))) + & {
+      display: none;
+    }
   }
 
   #navigator-toolbox {
@@ -24,7 +36,7 @@
     --tab-border-radius: var(--border-radius-medium);
     --zen-toolbox-min-width: 1px;
 
-    --tab-hover-background-color: var(--toolbarbutton-hover-background) !important;
+    --tab-hover-background-color: color-mix(in srgb, var(--toolbarbutton-hover-background) 50%, transparent 50%);
 
     min-width: var(--zen-toolbox-min-width);
     margin-top: 0 !important; /* Fix full screen mode */
@@ -32,6 +44,7 @@
     padding-top: var(--zen-toolbox-top-align);
     padding-bottom: var(--zen-element-separation) !important;
 
+    border: none;
     order: 0 !important;
 
     display: flex;
@@ -44,6 +57,7 @@
 
   #TabsToolbar-customization-target {
     position: relative;
+    max-width: 100%;
     gap: 0;
     &::after {
       content: '';
@@ -60,7 +74,7 @@
 
     @media (-moz-bool-pref: 'zen.view.show-bottom-border') {
       &::after {
-        background: color-mix(in srgb, var(--zen-colors-border) 70%, transparent 30%);
+        background: light-dark(rgba(1, 1, 1, 0.075), rgba(255, 255, 255, 0.1));
       }
     }
 
@@ -80,24 +94,28 @@
     margin-inline-start: 0 !important;
     padding-inline-start: 0 !important;
 
+    --tab-inner-inline-margin: 0;
+
     position: relative;
     border-bottom: 0px solid transparent !important;
 
     --tab-block-margin: 2px;
-    --tab-selected-bgcolor: light-dark(rgba(255,255,255,.7), color-mix(in srgb, var(--zen-colors-secondary) 50%, transparent 50%));
+    --tab-selected-bgcolor: light-dark(rgba(255,255,255,.8), rgba(255,255,255,.25));
     grid-gap: 0 !important;
 
+    &[overflow]::after,
+    #vertical-tabs-newtab-button {
+      /* Hide separator they give us, eww */
+      display: none !important;
+    }
+
     & .tabbrowser-tab {
       animation: zen-slide-in 0.2s ease-in-out;
 
-      max-width: unset !important;
+      max-width: unset;
       padding: 0 !important;
 
       position: relative;
-
-      height: calc(var(--tab-min-height) + var(--tab-block-margin) * 2) !important;
-      min-height: calc(var(--tab-min-height) + var(--tab-block-margin) * 2) !important;
-
       border-radius: var(--border-radius-medium);
 
       & .tab-background {
@@ -118,6 +136,39 @@
           opacity: 0.5;
         }
       }
+
+      /* We have a tab inside a tab, this means, it's a glance tab */
+      & .tabbrowser-tab {
+        border-radius: 5px;
+        pointer-events: none;
+        margin: 0;
+        --toolbarbutton-inner-padding: 0;
+
+        & .tab-background {
+          background: transparent;
+          box-shadow: none !important;
+        }
+        & label { display: none !important; }
+        & .tab-close-button { 
+          display: none !important; 
+        }
+
+        & .tab-icon-image {
+          --toolbarbutton-inner-padding: 0 !important;
+        }
+      }
+
+      /* On essentials, glance tabs are floating */
+      &[zen-essential='true'] .tabbrowser-tab {
+        position: absolute;
+        top: 3px;
+        right: 5px;
+        --tab-collapsed-width: 15px;
+        --tab-min-height: 15px;
+        width: var(--tab-collapsed-width) !important;
+        z-index: 1;
+        pointer-events: none;
+      }
     }
   }
 
@@ -145,26 +196,11 @@
 
   #vertical-pinned-tabs-container {
     padding-inline-end: 0 !important;
-    column-gap: 2px !important;
-    row-gap: 3px !important;
-    max-height: unset !important;
-    overflow: visible !important;
+    display: flex !important;
+    flex-direction: column;
 
-    @media not (prefers-color-scheme: dark) {
-      --zen-colors-border: var(--zen-colors-tertiary);
-    }
-
-    & .tab-background:not(:hover):not([selected]):not([multiselected]) {
-      --zen-pinned-tabs-bgcolor: rgba(255, 255, 255, 0.12);
-      @media not (prefers-color-scheme: dark) {
-        --zen-pinned-tabs-bgcolor: rgba(1, 1, 1, 0.075);
-      }
-      background: var(--zen-pinned-tabs-bgcolor) !important;
-      backdrop-filter: blur(10px);
-    }
-
-    &[selected] {
-      box-shadow: 0 0 1px 1px rgba(0, 0, 0, 0.05);
+    & .tabbrowser-tab:not(:hover) .tab-background:not([selected]):not([multiselected]) {
+      background: transparent !important;
     }
 
     & .tabbrowser-tab .tab-content {
@@ -172,6 +208,10 @@
       align-items: center;
       justify-content: center;
     }
+
+    .tabbrowser-tab[zen-glance-tab='true'] {
+      width: fit-content !important;
+    }
   }
 
   /* Mark: toolbox as expanded */
@@ -181,10 +221,11 @@
       #navigator-toolbox[zen-user-hover='true'][movingtab],
       #navigator-toolbox[zen-user-hover='true'][flash-popup],
       #navigator-toolbox[zen-user-hover='true'][has-popup-menu],
-      #navigator-toolbox[zen-user-hover='true']:has(*[open='true']:not(tab):not(#zen-sidepanel-button)),
+      #navigator-toolbox[zen-user-hover='true']:has(*[open='true']:not(tab):not(.zen-compact-mode-ignore)),
       #navigator-toolbox[zen-expanded='true']:not([zen-user-hover='true'])
     ) {
     --zen-toolbox-min-width: fit-content;
+    --tab-icon-end-margin: 8.5px;
     padding: var(--zen-toolbox-padding);
     padding-left: 0;
     padding-top: 0;
@@ -193,10 +234,22 @@
       min-width: 150px;
     }
 
+    & #tabbrowser-arrowscrollbox-periphery {
+      margin-inline: var(--tab-block-margin);
+    }
+
     & #zen-sidebar-top-buttons {
       padding-left: var(--zen-toolbox-padding);
     }
 
+    & #zen-workspaces-button[as-button='true'] {
+      width: calc(100% - 10px) !important;
+    }
+
+    & #zen-current-workspace-indicator-icon[no-icon='true'] {
+      display: none;
+    }
+
     & #zen-workspaces-button {
       margin-left: 2px;
       margin-right: 2px;
@@ -207,19 +260,10 @@
     }
 
     & #vertical-pinned-tabs-container:has(tab:not([hidden])) {
-      margin-bottom: 12px;
       position: relative;
 
-      &::after {
-        bottom: -6px;
-        content: '';
-        display: block;
-        height: 1px;
-        background: light-dark(rgba(1, 1, 1, 0.075), rgba(255, 255, 255, 0.075));
-        width: 99%;
-        left: 50%;
-        transform: translateX(-50%);
-        position: absolute;
+      & .tabbrowser-tab {
+        width: 100%;
       }
     }
 
@@ -231,8 +275,10 @@
 
       width: 100%;
       position: relative;
+    }
 
-      --toolbarbutton-inner-padding: var(--zen-toolbar-button-inner-padding) !important;
+    & #zen-essentials-container {
+      --tab-min-height: 42px;
     }
 
     /* Mark: Fix separator paddings */
@@ -293,18 +339,26 @@
     }
 
     & #tabbrowser-tabs {
+      --tab-inline-padding: 8px;
       & .tabbrowser-tab {
+
+        & .tab-label-container {
+          display: flex;
+        }
+
         & .tab-background {
           @media not (prefers-color-scheme: dark) {
             &:is([selected], [multiselected]) {
-              box-shadow: 0 0 1px 1px rgba(0, 0, 0, 0.15) !important;
+              box-shadow: 0 0 1px 1px rgba(0, 0, 0, 0.15);
             }
           }
           margin-inline: var(--tab-block-margin);
+          width: -moz-available;
         }
 
-        &:not([pinned]):is(:hover, [visuallyselected]) .tab-close-button {
-          display: block !important;
+        &:is(:hover, [visuallyselected]) .tab-close-button {
+          display: block;
+          --tab-inline-padding: 0; /* Avoid weird padding */
         }
 
         .tab-throbber,
@@ -312,10 +366,8 @@
         .tab-icon-image,
         .tab-sharing-icon-overlay,
         .tab-icon-overlay {
-          &:not([pinned]) {
-            margin-inline-end: var(--toolbarbutton-inner-padding) !important;
-            margin-inline-start: calc(var(--toolbarbutton-inner-padding) / 4) !important;
-          }
+          margin-inline-end: var(--toolbarbutton-inner-padding) !important;
+          margin-inline-start: calc(var(--toolbarbutton-inner-padding) / 4) !important;
         }
       }
     }
@@ -335,16 +387,44 @@
           #navigator-toolbox[zen-user-hover='true'][movingtab],
           #navigator-toolbox[zen-user-hover='true'][flash-popup],
           #navigator-toolbox[zen-user-hover='true'][has-popup-menu],
-          #navigator-toolbox[zen-user-hover='true']:has(*[open='true']:not(tab):not(#zen-sidepanel-button)),
+          #navigator-toolbox[zen-user-hover='true']:has(*[open='true']:not(tab):not(.zen-compact-mode-ignore)),
           #navigator-toolbox[zen-expanded='true']:not([zen-user-hover='true'])
         )
     ) {
+    --tab-min-width: 36px !important;
+
     /* Important: When changin this value, make sure expand on hover doesn't break! */
-    --zen-toolbox-max-width: 49px; /* 1px more because the browser view has one pixel of padding to avoid the border being cut off */
-    --zen-toolbox-padding: 8px;
+    --zen-toolbox-padding: calc(var(--zen-element-separation) / 2 + 1px);
+    --zen-toolbox-max-width: calc(var(--tab-min-width) + var(--zen-toolbox-padding) * 2);
     max-width: var(--zen-toolbox-max-width) !important;
     min-width: var(--zen-toolbox-max-width) !important;
 
+    --zen-tabbar-offset: 1px; /* Fix the tabbar offset, because there's a shadow */
+    &[zen-right-side='true'] {
+      margin-left: var(--zen-tabbar-offset);
+    }
+
+    &:not([zen-right-side='true']) {
+      margin-right: var(--zen-tabbar-offset);
+    }
+
+    & #zen-current-workspace-indicator-name {
+      display: none;
+    }
+
+    & #zen-current-workspace-indicator {
+      padding-left: 0;
+      padding-right: 0;
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      opacity: .4;
+    }
+
+    & #zen-essentials-container {
+      justify-content: center;
+    }
+
     & #vertical-tabs-newtab-button {
       padding: 0 !important;
       background: transparent !important;
@@ -372,24 +452,23 @@
       }
 
       &::before {
-        width: 60% !important;
+        width: 90% !important;
       }
     }
 
+    & #EssentialsToolbar {
+      display: none !important;
+    }
+
+    & #essentials-accordion-header {
+      display: none !important;
+    }
+
     & #vertical-pinned-tabs-container:has(tab:not([hidden])) {
-      margin-bottom: 12px;
       position: relative;
 
-      &::after {
-        bottom: -6px;
-        content: '';
-        display: block;
-        height: 1px;
-        background: light-dark(rgba(1, 1, 1, 0.075), rgba(255, 255, 255, 0.075));
-        width: 70%;
-        left: 50%;
-        transform: translateX(-50%);
-        position: absolute;
+      & .tabbrowser-tab {
+        max-width: var(--tab-min-width);
       }
     }
 
@@ -402,16 +481,20 @@
     }
 
     & #tabbrowser-tabs {
-      --tab-min-width: 36px !important;
+      margin-top: -2px;
 
       & .tabbrowser-tab {
         margin: 0 auto;
-        width: var(--tab-min-width) !important;
-        height: var(--tab-min-width) !important;
 
-        & .tab-background:is([selected], [multiselected]) {
-          @media not (prefers-color-scheme: dark) {
-            box-shadow: 0 0 1px 1px rgba(0, 0, 0, 0.12) !important;
+        & .tab-background {
+          margin-inline: auto !important;
+
+          &:is([selected], [multiselected]) {
+            box-shadow: 0 0 1px 1px rgba(0,0,0,.1);
+            
+            @media not (prefers-color-scheme: dark) {
+              box-shadow: 0 0 1px 1px rgba(0, 0, 0, 0.12) !important;
+            }
           }
         }
 
@@ -419,22 +502,22 @@
           display: flex;
           align-content: center;
           justify-content: center;
+          padding: 0 !important;
 
           & .tab-label-container {
-            display: none;
+            display: none !important;
           }
 
           & .tab-icon-image,
           & .tab-icon-pending {
             margin-inline-end: 0 !important;
           }
-        }
-      }
 
-      #vertical-pinned-tabs-container {
-        display: flex;
-        flex-direction: column;
-        gap: 0 !important;
+          /* Hide glances */
+          & .tabbrowser-tab {
+            display: none !important;
+          }
+        }
       }
 
       @media (-moz-bool-pref: 'zen.view.sidebar-collapsed.hide-mute-button') {
@@ -534,8 +617,8 @@
     #navigator-toolbox[flash-popup],
     #navigator-toolbox[has-popup-menu],
     #navigator-toolbox:has(.tabbrowser-tab:active),
-    #navigator-toolbox:has(*[open='true']:not(tab):not(#zen-sidepanel-button)) {
-      --zen-toolbox-max-width: 49px;
+    #navigator-toolbox:has(*[open='true']:not(tab):not(.zen-compact-mode-ignore)) {
+      --zen-toolbox-max-width: 45px;
       max-width: var(--zen-toolbox-max-width) !important;
       min-width: var(--zen-toolbox-max-width) !important;
       padding: 0 !important;
@@ -543,17 +626,20 @@
       & #TabsToolbar {
         z-index: 100 !important;
         width: 250px !important;
-        background-color: var(--zen-dialog-background);
-        border-top-color: var(--zen-colors-border);
+        
+        background: var(--zen-main-browser-background-toolbar) !important;
+        background-attachment: fixed !important;
+        background-size: 2000px !important; /* Dont ask me why */
+
+        box-shadow: 0 0 1px 1px rgba(0, 0, 0, 0.2);
+
         position: absolute;
         padding: var(--zen-toolbox-padding);
-        padding-top: 0;
         transition: 0 !important;
         /*animation: zen-vtabs-animation 0.3s ease-in-out;*/
         -moz-window-dragging: no-drag;
         overflow: hidden;
         transition: width 0.2s !important;
-        border-right: 1px solid var(--zen-colors-border);
 
         & .tab-throbber,
         & .tab-icon-pending,
@@ -564,39 +650,8 @@
         }
       }
 
-      /* Make pinned tabs stay in a single line */
-      #vertical-pinned-tabs-container {
-        display: flex;
-        flex-direction: column;
-        gap: 0 !important;
-
-        position: relative;
-
-        & .tabbrowser-tab {
-          & .tab-label-container {
-            display: flex;
-          }
-
-          & .tab-throbber,
-          & .tab-icon-pending,
-          & .tab-icon-image,
-          & .tab-sharing-icon-overlay,
-          & .tab-icon-overlay {
-            margin-inline-end: var(--toolbarbutton-inner-padding) !important;
-          }
-
-          &:not(:hover):not([selected]):not([multiselected]) .tab-background {
-            box-shadow: none;
-
-            background: transparent !important;
-          }
-        }
-      }
-
       &[zen-right-side='true'] #TabsToolbar {
         right: 0;
-        border-right: 0;
-        border-left: 1px solid var(--zen-colors-border);
         border-top-left-radius: var(--zen-border-radius);
         border-top-right-radius: 0;
       }
@@ -628,7 +683,7 @@
   #tabbrowser-tabs {
     & .tabbrowser-tab {
       &[pinned] .tab-close-button {
-        display: none !important;
+        display: none;
       }
 
       &[selected] .tab-background {
@@ -686,7 +741,11 @@
     }
   }
 
-  @media (-moz-bool-pref: 'zen.tabs.show-newtab-under') {
+  #tabs-newtab-button {
+    display: none;
+  }
+
+  @media (-moz-bool-pref: 'zen.tabs.show-newtab-vertical') {
     #tabs-newtab-button {
       display: flex !important;
     }
@@ -696,20 +755,79 @@
         --zen-colors-border: var(--zen-colors-tertiary);
       }
 
-      margin-top: 10px;
-      position: relative;
+      @media (-moz-bool-pref: 'zen.view.show-newtab-button-top') {
+        order: -1;
+      }
 
-      &::before {
-        content: '';
-        display: block;
-        height: 1px;
-        background: light-dark(rgba(1, 1, 1, 0.075), rgba(255, 255, 255, 0.075));
-        width: 96%;
-        position: absolute;
-        top: -5px;
-        left: 50%;
-        transform: translateX(-50%);
+      @media (-moz-bool-pref: 'zen.view.show-newtab-button-border-top') and (not (-moz-bool-pref: 'zen.view.show-newtab-button-top')) {
+        #tabbrowser-arrowscrollbox:has(tab:not([hidden])) & {
+          margin-top: 15px;
+          position: relative;
+          &::before {
+            content: '';
+            display: block;
+            height: 1px;
+            background: light-dark(rgba(1, 1, 1, 0.075), rgba(255, 255, 255, 0.1));
+            width: 98%;
+            position: absolute;
+            top: -8px;
+            left: 50%;
+            transform: translateX(-50%);
+          }
+        }
       }
     }
   }
 }
+
+/* Mark: Essentials Toolbar */
+#zen-essentials-container {
+  padding-bottom: var(--zen-toolbox-padding);
+  overflow: hidden;
+  gap: 3px;
+}
+
+#zen-essentials-container {
+  overflow: hidden;
+  transition: max-height 0.3s ease-out;
+  opacity: 1;
+  grid-template-columns: repeat(auto-fit, minmax(var(--tab-pinned-min-width-expanded), auto));
+  overflow-y: auto;
+  overflow-x: hidden;
+  scrollbar-width: thin;
+  display: grid;
+  padding: 0;
+}
+
+#zen-essentials-container .tabbrowser-tab {
+  --toolbarbutton-inner-padding: 0;
+  max-width: unset;
+  width: 100% !important;
+  border-radius: var(--border-radius-medium);
+
+  &:not([selected]) .tab-background {
+    background: light-dark(rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.1));
+    box-shadow: none;
+  }
+
+  backdrop-filter: blur(10px);
+
+  & .tab-content {
+    display: flex;
+    justify-content: center;
+  }
+
+  & .tab-label-container {
+    display: none !important;
+  }
+
+  & .tab-close-button {
+    display: none !important;
+  }
+
+  & .tab-icon-image,
+  & .tab-icon-overlay {
+    margin-inline-end: 0 !important;
+  }
+}
+

src/browser/base/content/zen-styles/zen-theme.css

@@ -32,13 +32,16 @@
 
   --in-content-primary-button-background: light-dark(
     color-mix(in srgb, var(--zen-primary-color) 35%, black 65%),
-    color-mix(in srgb, var(--zen-primary-color) 35%, white 65%)
+    color-mix(in srgb, var(--zen-primary-color) 85%, black 15%)
   ) !important;
   --in-content-primary-button-background-hover: light-dark(
     color-mix(in srgb, var(--zen-primary-color) 40%, black 60%),
     color-mix(in srgb, var(--zen-primary-color) 40%, white 60%)
   ) !important;
-  --in-content-primary-button-background-active: var(--zen-colors-hover-bg) !important;
+  --in-content-primary-button-background-active: light-dark(
+    color-mix(in srgb, var(--zen-primary-color) 50%, black 50%),
+    color-mix(in srgb, var(--zen-primary-color) 80%, rgba(255,255,255,.2) 20%)
+  ) !important;
   --in-content-primary-button-text-color: light-dark(white, black) !important;
   --in-content-primary-button-border-color: transparent !important;
   --in-content-primary-button-border-hover: transparent !important;
@@ -53,7 +56,7 @@
     color-mix(in srgb, var(--zen-primary-color) 10%, transparent 90%)
   ) !important;
   --in-content-button-background-hover: light-dark(
-    color-mix(in srgb, var(--zen-primary-color) 5%, rgba(0, 0, 0, 0.1) 95%),
+    color-mix(in srgb, var(--zen-primary-color) 10%, rgb(255, 255, 255) 90%),
     color-mix(in srgb, var(--zen-primary-color) 15%, transparent 85%)
   ) !important;
   --button-bgcolor: var(--in-content-button-background) !important;
@@ -69,16 +72,22 @@
   --button-primary-active-bgcolor: var(--in-content-primary-button-background-active) !important;
   --button-primary-color: var(--in-content-primary-button-text-color) !important;
 
-  --color-accent-primary-hover: var(--zen-primary-color) !important;
+  --button-background-color: var(--in-content-button-background) !important;
+  --button-background-color-hover: var(--in-content-button-background-hover) !important;
+  --button-background-color-active: var(--in-content-primary-button-background-active) !important;
+
+  --color-accent-primary: var(--button-primary-bgcolor) !important;
+  --color-accent-primary-hover: var(--button-primary-hover-bgcolor) !important;
+  --color-accent-primary-active: var(--button-primary-active-bgcolor) !important;
 
   --in-content-page-background: var(--zen-colors-tertiary) !important;
   --zen-in-content-dialog-background: var(--zen-colors-tertiary);
 
-  --zen-button-border-radius: 7px;
+  --zen-button-border-radius: 5px;
   --zen-button-padding: 0.6rem 1.2rem;
 
   /* Toolbar */
-  --zen-toolbar-height: 39px;
+  --zen-toolbar-height: 41px;
   --zen-toolbar-button-inner-padding: 6px;
   --toolbarbutton-outer-padding: 4px;
 
@@ -90,6 +99,7 @@
 
   /* XUL */
   --zen-main-browser-background: light-dark(rgb(235, 235, 235), #1b1b1b);
+  --zen-main-browser-background-toolbar: var(--zen-main-browser-background);
   --zen-browser-gradient-base: color-mix(in srgb, var(--zen-primary-color) 50%, white 50%);
 
   --zen-appcontent-border: 1px solid var(--zen-colors-border);
@@ -113,11 +123,17 @@
   --fp-contextmenu-bgcolor: light-dark(Menu, rgb(43 42 51 / 0.95));
   --toolbar-bgcolor: transparent;
 
-  --toolbarbutton-active-background: var(--zen-colors-border) !important;
+  --toolbarbutton-active-background: light-dark(rgba(255, 255, 255, .9), color-mix(in srgb, var(--zen-primary-color) 50%, rgba(255, 255, 255, .1)));
 
   --input-bgcolor: var(--zen-colors-tertiary) !important;
   --input-border-color: var(--zen-input-border-color) !important;
-  --zen-themed-toolbar-bg: light-dark(#f7f7f7, var(--zen-colors-tertiary)) !important;
+  --zen-themed-toolbar-bg: light-dark(#f7f7f7, var(--zen-colors-tertiary));
+  --zen-themed-toolbar-bg-transparent: light-dark(#f7f7f7, var(--zen-colors-tertiary));
+
+  @supports (-moz-osx-font-smoothing: auto) {
+    --zen-themed-toolbar-bg-transparency: 0.05;
+    --zen-themed-toolbar-bg-transparent: light-dark(rgba(255, 255, 255, var(--zen-themed-toolbar-bg-transparency)), rgba(0, 0, 0, var(--zen-themed-toolbar-bg-transparency)));
+  }
 
   --toolbar-field-background-color: var(--zen-colors-input-bg) !important;
   --arrowpanel-background: var(--zen-dialog-background) !important;
@@ -174,10 +190,3 @@
     }
   }
 }
-
-@media not (-moz-bool-pref: 'zen.theme.toolbar-themed') {
-  :root {
-    --toolbar-bgcolor: light-dark(#e6e6e6, #1b1b1b) !important;
-    --zen-themed-toolbar-bg: var(--toolbar-bgcolor);
-  }
-}

src/browser/base/content/zen-styles/zen-urlbar.css

@@ -5,7 +5,7 @@
 }
 
 #urlbar {
-  --toolbarbutton-border-radius: 10px;
+  --toolbarbutton-border-radius: 6px;
   --urlbarView-separator-color: var(--zen-colors-border);
   --urlbarView-hover-background: var(--toolbarbutton-hover-background);
   --urlbarView-highlight-background: var(--toolbarbutton-hover-background);
@@ -36,7 +36,7 @@
 }
 
 #urlbar:not([focused='true']):not([breakout-extend="true"]) > #urlbar-background {
-  background: color-mix(in srgb, light-dark(#fff, var(--zen-colors-secondary)) 65%, transparent 35%) !important;
+  background: color-mix(in srgb, light-dark(#fff, var(--zen-colors-tertiary)) 60%, transparent 40%) !important;
   backdrop-filter: blur(10px);
 }
 
@@ -51,25 +51,6 @@
   outline-color: none !important;
 }
 
-#urlbar #tracking-protection-icon-container {
-  border-radius: var(--toolbarbutton-border-radius);
-}
-
-#urlbar .urlbar-page-action {
-  border-radius: calc(var(--toolbarbutton-border-radius) / 1.5);
-}
-
-#urlbar[breakout-extend='true'] .urlbar-page-action,
-#urlbar[breakout-extend='true'] #tracking-protection-icon-container,
-#urlbar[breakout-extend='true'] #identity-box #identity-icon-box,
-.searchbar-engine-one-off-item {
-  border-radius: var(--toolbarbutton-border-radius) !important;
-}
-
-#urlbar[breakout-extend='true'] {
-  border-radius: 12px;
-}
-
 #identity-icon-box,
 #identity-permission-box {
   background: color-mix(in srgb, var(--zen-colors-secondary) 50%, transparent 50%) !important;
@@ -111,16 +92,14 @@
 
 .urlbar-page-action,
 #tracking-protection-icon-container {
-  width: calc(var(--urlbar-min-height) - 4px - 4 * var(--urlbar-container-padding)) !important;
-  height: calc(var(--urlbar-min-height) - 4px - 4 * var(--urlbar-container-padding)) !important;
   padding: 0 !important;
   justify-content: center !important;
   align-items: center !important;
   margin: 0 0 0 2px !important;
 }
 
-#urlbar[breakout-extend='true'] .urlbar-page-action,
-#urlbar[breakout-extend='true'] #tracking-protection-icon-container {
+.urlbar-page-action,
+#tracking-protection-icon-container {
   width: calc(var(--urlbar-min-height) - 4 * var(--urlbar-container-padding)) !important;
   height: calc(var(--urlbar-min-height) - 4 * var(--urlbar-container-padding)) !important;
 }
@@ -253,7 +232,8 @@ button.popup-notification-dropmarker {
     max-width: 30rem !important;
 
     & notification-message {
-      background: var(--zen-colors-tertiary);
+      background: color-mix(in srgb, var(--zen-colors-tertiary) 70%, transparent 30%);
+      backdrop-filter: blur(10px);
       border: 1px solid var(--arrowpanel-border-color);
       border-radius: var(--zen-border-radius);
 

src/browser/base/content/zen-styles/zen-workspaces.css

@@ -7,11 +7,15 @@
 
   position: relative;
 
+  &[dont-show='true'] {
+    display: none !important;
+  }
+
   &:not([as-button='true']) {
     --toolbarbutton-hover-background: transparent !important;
     border-radius: var(--zen-button-border-radius) !important;
     background: transparent;
-    padding: 5px;
+    padding: 2px;
     appearance: unset !important;
     height: fit-content;
     gap: 3px;
@@ -25,10 +29,6 @@
       align-items: center;
       position: relative;
 
-      & > * {
-        opacity: 0.6;
-      }
-
       @media (-moz-bool-pref: 'zen.workspaces.hide-deactivated-workspaces') {
         &:not([active='true']):not(:hover) {
           &::after {
@@ -79,7 +79,7 @@
     }
   }
 
-  :root:has(#navigator-toolbox:not([zen-has-hover='true'])) &[as-button='true'] {
+  &[as-button='true'] {
     margin: auto;
     padding: var(--toolbarbutton-inner-padding) !important;
     width: calc(2 * var(--toolbarbutton-inner-padding) + 16px) !important;
@@ -168,7 +168,7 @@
 
 #PanelUI-zen-workspaces panelmultiview panelview {
   position: relative;
-  padding: 15px;
+  padding: 10px;
   width: var(--panel-width);
 }
 
@@ -323,7 +323,7 @@
     top: 50%;
     transform: translateY(-50%);
     left: -2px;
-    width: 3px;
+    width: 2px;
     height: 16px;
     background-color: var(--toolbarbutton-icon-fill-attention);
     border-radius: 5px;
@@ -340,9 +340,8 @@
   top: 0;
   left: 0;
   width: 100%;
-  height: 4px;
+  height: 2px;
   background-color: var(--toolbarbutton-icon-fill-attention);
-  border-radius: 5px;
 }
 
 .zen-workspace-last-place-drop-target.dragover {
@@ -406,3 +405,38 @@
 #PanelUI-zen-workspaces-edit-footer button[default='true'] {
   width: 100%;
 }
+
+/* Mark workspaces indicator */
+#zen-current-workspace-indicator {
+  padding: 15px calc(4px + var(--tab-inline-padding));
+  font-weight: 600;
+  align-items: center;
+  position: relative;
+  
+  & #zen-current-workspace-indicator-icon {
+    font-size: 14px;
+  }
+
+  #zen-current-workspace-indicator-name {
+    font-size: 13px;
+    opacity: 0.5;
+
+    overflow: hidden;
+    white-space: nowrap;
+    text-overflow: ellipsis;
+    display: block;
+
+    position: absolute;
+    max-width: 100%;
+  }
+
+  & #zen-current-workspace-indicator-icon:not([hidden]) + #zen-current-workspace-indicator-name  {
+    margin-left: 25px;
+  }
+}
+
+@media not (-moz-bool-pref: 'zen.workspaces.show-workspace-indicator') {
+  #zen-current-workspace-indicator {
+    display: none;
+  }
+}

src/browser/base/content/zen-tabbrowser-elements.inc.xhtml

@@ -0,0 +1,3 @@
+#include zen-sidebar-panel.inc.xhtml
+#include zen-splitview-overlay.inc.xhtml
+#include zen-glance.inc.xhtml

src/browser/base/zen-components/ZenActorsManager.mjs

@@ -0,0 +1,19 @@
+
+// Utility to register JSWindowActors
+var gZenActorsManager = {
+  _actors: new Set(),
+
+  addJSWindowActor(...args) {
+    if (this._actors.has(args[0])) {
+      // Actor already registered, nothing to do
+      return;
+    }
+
+    try {
+      ChromeUtils.registerWindowActor(...args);
+      this._actors.add(args[0]);
+    } catch (e) {
+      console.warn(`Failed to register JSWindowActor: ${e}`);
+    }
+  },
+}

src/browser/base/zen-components/ZenCommonUtils.mjs

@@ -0,0 +1,55 @@
+var gZenOperatingSystemCommonUtils = {
+  kZenOSToSmallName: {
+    WINNT: 'windows',
+    Darwin: 'macos',
+    Linux: 'linux',
+  },
+
+  get currentOperatingSystem() {
+    let os = Services.appinfo.OS;
+    return this.kZenOSToSmallName[os];
+  },
+};
+
+class ZenMultiWindowFeature {
+  constructor() {}
+
+  static get browsers() {
+    return Services.wm.getEnumerator('navigator:browser');
+  }
+
+  static get currentBrowser() {
+    return Services.wm.getMostRecentWindow('navigator:browser');
+  }
+
+  isActiveWindow() {
+    return ZenMultiWindowFeature.currentBrowser === window;
+  }
+
+  async foreachWindowAsActive(callback) {
+    if (!this.isActiveWindow()) {
+      return;
+    }
+    for (const browser of ZenMultiWindowFeature.browsers) {
+      try {
+        await callback(browser);
+      } catch (e) {
+        console.error(e);
+      }
+    }
+  }
+}
+
+class ZenDOMOperatedFeature {
+  constructor() {
+    var initBound = this.init.bind(this);
+    document.addEventListener('DOMContentLoaded', initBound, { once: true });
+  }
+}
+
+class ZenPreloadedFeature {
+  constructor() {
+    var initBound = this.init.bind(this);
+    document.addEventListener('MozBeforeInitialXULLayout', initBound, { once: true });
+  }
+}

src/browser/base/zen-components/ZenCompactMode.mjs

@@ -0,0 +1,253 @@
+const lazyCompactMode = {};
+
+XPCOMUtils.defineLazyPreferenceGetter(
+  lazyCompactMode,
+  'COMPACT_MODE_FLASH_DURATION',
+  'zen.view.compact.toolbar-flash-popup.duration',
+  800
+);
+
+var gZenCompactModeManager = {
+  _flashTimeouts: {},
+  _evenListeners: [],
+  _removeHoverFrames: {},
+
+  init() {
+    Services.prefs.addObserver('zen.view.compact', this._updateEvent.bind(this));
+    Services.prefs.addObserver('zen.view.sidebar-expanded.on-hover', this._disableTabsOnHoverIfConflict.bind(this));
+    Services.prefs.addObserver('zen.tabs.vertical.right-side', this._updateSidebarIsOnRight.bind(this));
+
+    gZenUIManager.addPopupTrackingAttribute(this.sidebar);
+    gZenUIManager.addPopupTrackingAttribute(document.getElementById('zen-appcontent-navbar-container'));
+
+    this.addMouseActions();
+    this.addContextMenu();
+  },
+
+  get prefefence() {
+    return Services.prefs.getBoolPref('zen.view.compact');
+  },
+
+  set preference(value) {
+    Services.prefs.setBoolPref('zen.view.compact', value);
+    return value;
+  },
+
+  get sidebarIsOnRight() {
+    if (this._sidebarIsOnRight) {
+      return this._sidebarIsOnRight;
+    }
+    return Services.prefs.getBoolPref('zen.tabs.vertical.right-side');
+  },
+
+  get sidebar() {
+    if (!this._sidebar) {
+      this._sidebar = document.getElementById('navigator-toolbox');
+    }
+    return this._sidebar;
+  },
+
+  addContextMenu() {
+    const fragment = window.MozXULElement.parseXULToFragment(`
+      <menu id="zen-context-menu-compact-mode" data-l10n-id="zen-toolbar-context-compact-mode">
+        <menupopup>
+          <menuitem id="zen-context-menu-compact-mode-toggle" data-l10n-id="zen-toolbar-context-compact-mode-enable" type="checkbox" oncommand="gZenCompactModeManager.toggle();"/>
+          <menuseparator/>
+          <menuitem id="zen-context-menu-compact-mode-hide-sidebar" data-l10n-id="zen-toolbar-context-compact-mode-just-tabs" type="radio" oncommand="gZenCompactModeManager.hideSidebar();"/>
+          <menuitem id="zen-context-menu-compact-mode-hide-toolbar" data-l10n-id="zen-toolbar-context-compact-mode-just-toolbar" type="radio" oncommand="gZenCompactModeManager.hideToolbar();"/>
+          <menuitem id="zen-context-menu-compact-mode-hide-both" data-l10n-id="zen-toolbar-context-compact-mode-hide-both" type="radio" oncommand="gZenCompactModeManager.hideBoth();"/>
+        </menupopup>
+      </menu>
+    `);
+    document.getElementById('viewToolbarsMenuSeparator').before(fragment);
+    this.updateContextMenu();
+  },
+
+  hideSidebar() {
+    Services.prefs.setBoolPref('zen.view.compact.hide-tabbar', true);
+    Services.prefs.setBoolPref('zen.view.compact.hide-toolbar', false);
+  },
+
+  hideToolbar() {
+    Services.prefs.setBoolPref('zen.view.compact.hide-toolbar', true);
+    Services.prefs.setBoolPref('zen.view.compact.hide-tabbar', false);
+  },
+
+  hideBoth() {
+    Services.prefs.setBoolPref('zen.view.compact.hide-tabbar', true);
+    Services.prefs.setBoolPref('zen.view.compact.hide-toolbar', true);
+  },
+
+  addEventListener(callback) {
+    this._evenListeners.push(callback);
+  },
+
+  _updateEvent() {
+    this._evenListeners.forEach((callback) => callback());
+    this._disableTabsOnHoverIfConflict();
+    this.updateContextMenu();
+  },
+
+  updateContextMenu() {
+    document
+      .getElementById('zen-context-menu-compact-mode-toggle')
+      .setAttribute('checked', Services.prefs.getBoolPref('zen.view.compact'));
+
+    const hideTabBar = Services.prefs.getBoolPref('zen.view.compact.hide-tabbar');
+    const hideToolbar = Services.prefs.getBoolPref('zen.view.compact.hide-toolbar');
+    const hideBoth = hideTabBar && hideToolbar;
+
+    const idName = 'zen-context-menu-compact-mode-hide-';
+    document.getElementById(idName + 'sidebar').setAttribute('checked', !hideBoth && hideTabBar);
+    document.getElementById(idName + 'toolbar').setAttribute('checked', !hideBoth && hideToolbar);
+    document.getElementById(idName + 'both').setAttribute('checked', hideBoth);
+  },
+
+  _removeOpenStateOnUnifiedExtensions() {
+    // Fix for bug https://github.com/zen-browser/desktop/issues/1925
+    const buttons = document.querySelectorAll('toolbarbutton:is(#unified-extensions-button, .webextension-browser-action)');
+    for (let button of buttons) {
+      button.removeAttribute('open');
+    }
+  },
+
+  _disableTabsOnHoverIfConflict() {
+    if (Services.prefs.getBoolPref('zen.view.compact') && Services.prefs.getBoolPref('zen.view.compact.hide-tabbar')) {
+      Services.prefs.setBoolPref('zen.view.sidebar-expanded.on-hover', false);
+    }
+  },
+
+  toggle() {
+    return (this.preference = !this.prefefence);
+  },
+
+  _updateSidebarIsOnRight() {
+    this._sidebarIsOnRight = Services.prefs.getBoolPref('zen.tabs.vertical.right-side');
+  },
+
+  toggleSidebar() {
+    this.sidebar.toggleAttribute('zen-user-show');
+  },
+
+  get hideAfterHoverDuration() {
+    if (this._hideAfterHoverDuration) {
+      return this._hideAfterHoverDuration;
+    }
+    return Services.prefs.getIntPref('zen.view.compact.toolbar-hide-after-hover.duration');
+  },
+
+  get hoverableElements() {
+    return [
+      {
+        element: this.sidebar,
+        screenEdge: this.sidebarIsOnRight ? 'right' : 'left',
+      },
+      {
+        element: document.getElementById('zen-appcontent-navbar-container'),
+        screenEdge: 'top',
+      },
+    ];
+  },
+
+  flashSidebar(duration = lazyCompactMode.COMPACT_MODE_FLASH_DURATION) {
+    let tabPanels = document.getElementById('tabbrowser-tabpanels');
+    if (!tabPanels.matches("[zen-split-view='true']")) {
+      this.flashElement(this.sidebar, duration, this.sidebar.id);
+    }
+  },
+
+  flashElement(element, duration, id, attrName = 'flash-popup') {
+    if (element.matches(':hover')) {
+      return;
+    }
+    if (this._flashTimeouts[id]) {
+      clearTimeout(this._flashTimeouts[id]);
+    } else {
+      requestAnimationFrame(() => element.setAttribute(attrName, 'true'));
+    }
+    this._flashTimeouts[id] = setTimeout(() => {
+      window.requestAnimationFrame(() => {
+        element.removeAttribute(attrName);
+        this._flashTimeouts[id] = null;
+      });
+    }, duration);
+  },
+
+  clearFlashTimeout(id) {
+    clearTimeout(this._flashTimeouts[id]);
+    this._flashTimeouts[id] = null;
+  },
+
+  addMouseActions() {
+    for (let i = 0; i < this.hoverableElements.length; i++) {
+      let target = this.hoverableElements[i].element;
+      target.addEventListener('mouseenter', (event) => {
+        this.clearFlashTimeout('has-hover' + target.id);
+        window.requestAnimationFrame(() => target.setAttribute('zen-has-hover', 'true'));
+      });
+
+      target.addEventListener('mouseleave', (event) => {
+        // If on Mac, ignore mouseleave in the area of window buttons
+        if (AppConstants.platform == 'macosx') {
+          const MAC_WINDOW_BUTTONS_X_BORDER = 75;
+          const MAC_WINDOW_BUTTONS_Y_BORDER = 40;
+          if (event.clientX < MAC_WINDOW_BUTTONS_X_BORDER && event.clientY < MAC_WINDOW_BUTTONS_Y_BORDER) {
+            return;
+          }
+        }
+
+        if (this.hoverableElements[i].keepHoverDuration) {
+          this.flashElement(target, keepHoverDuration, 'has-hover' + target.id, 'zen-has-hover');
+        } else {
+          this._removeHoverFrames[target.id] = window.requestAnimationFrame(() => target.removeAttribute('zen-has-hover'));
+        }
+      });
+    }
+
+    document.documentElement.addEventListener('mouseleave', (event) => {
+      const screenEdgeCrossed = this._getCrossedEdge(event.pageX, event.pageY);
+      if (!screenEdgeCrossed) return;
+      for (let entry of this.hoverableElements) {
+        if (screenEdgeCrossed !== entry.screenEdge) continue;
+        const target = entry.element;
+        const boundAxis = entry.screenEdge === 'right' || entry.screenEdge === 'left' ? 'y' : 'x';
+        if (!this._positionInBounds(boundAxis, target, event.pageX, event.pageY, 7)) {
+          continue;
+        }
+        window.cancelAnimationFrame(this._removeHoverFrames[target.id]);
+
+        this.flashElement(target, this.hideAfterHoverDuration, 'has-hover' + target.id, 'zen-has-hover');
+        document.addEventListener(
+          'mousemove',
+          () => {
+            if (target.matches(':hover')) return;
+            target.removeAttribute('zen-has-hover');
+            this.clearFlashTimeout('has-hover' + target.id);
+          },
+          { once: true }
+        );
+      }
+    });
+  },
+
+  _getCrossedEdge(posX, posY, element = document.documentElement, maxDistance = 10) {
+    const targetBox = element.getBoundingClientRect();
+    posX = Math.max(targetBox.left, Math.min(posX, targetBox.right));
+    posY = Math.max(targetBox.top, Math.min(posY, targetBox.bottom));
+    return ['top', 'bottom', 'left', 'right'].find((edge, i) => {
+      const distance = Math.abs((i < 2 ? posY : posX) - targetBox[edge]);
+      return distance <= maxDistance;
+    });
+  },
+
+  _positionInBounds(axis = 'x', element, x, y, error = 0) {
+    const bBox = element.getBoundingClientRect();
+    if (axis === 'y') return bBox.top - error < y && y < bBox.bottom + error;
+    else return bBox.left - error < x && x < bBox.right + error;
+  },
+
+  toggleToolbar() {
+    let toolbar = document.getElementById('zen-appcontent-navbar-container');
+    toolbar.toggleAttribute('zen-user-show');
+  },
+};

src/browser/base/zen-components/ZenGlanceManager.mjs

@@ -0,0 +1,356 @@
+
+{
+
+  class ZenGlanceManager extends ZenDOMOperatedFeature {
+    #currentBrowser = null;
+    #currentTab = null;
+
+    #animating = false;
+
+    init() {
+      document.documentElement.setAttribute("zen-glance-uuid", gZenUIManager.generateUuidv4());
+      window.addEventListener("keydown", this.onKeyDown.bind(this));
+      window.addEventListener("TabClose", this.onTabClose.bind(this));
+
+      ChromeUtils.defineLazyGetter(
+        this,
+        'sidebarButtons',
+        () => document.getElementById('zen-glance-sidebar-container')
+      );
+
+      document.getElementById('tabbrowser-tabpanels').addEventListener("click", this.onOverlayClick.bind(this));
+
+      Services.obs.addObserver(this, "quit-application-requested");
+    }
+
+    onKeyDown(event) {
+      if (event.key === "Escape" && this.#currentBrowser) {
+        event.preventDefault();
+        event.stopPropagation();
+        this.closeGlance();
+      }
+    }
+
+    onOverlayClick(event) {
+      if (event.target === this.overlay && event.originalTarget !== this.contentWrapper) {
+        this.closeGlance();
+      }
+    }
+
+    observe(subject, topic) {
+      switch (topic) {
+        case "quit-application-requested":
+          this.onUnload();
+          break;
+      }
+    }
+
+    onUnload() {
+      // clear everything
+      if (this.#currentBrowser) {
+        gBrowser.removeTab(this.#currentTab);
+      }
+    }
+
+    createBrowserElement(url, currentTab) {
+      const newTabOptions = {
+        userContextId: currentTab.getAttribute("usercontextid") || "",
+        skipBackgroundNotify: true,
+        insertTab: true,
+        skipLoad: false,
+        index: currentTab._tPos + 1,
+      };
+      this.currentParentTab = currentTab;
+      const newTab = gBrowser.addTrustedTab(Services.io.newURI(url).spec, newTabOptions);
+
+      gBrowser.selectedTab = newTab;
+      currentTab.querySelector(".tab-content").appendChild(newTab);
+      newTab.setAttribute("zen-glance-tab", true);
+      this.#currentBrowser = newTab.linkedBrowser;
+      this.#currentTab = newTab;
+      return this.#currentBrowser;
+    }
+
+    openGlance(data) {
+      if (this.#currentBrowser) {
+        return;
+      }
+
+      const initialX = data.x;
+      const initialY = data.y;
+      const initialWidth = data.width;
+      const initialHeight = data.height;
+
+      this.browserWrapper?.removeAttribute("animate");
+      this.browserWrapper?.removeAttribute("animate-end");
+      this.browserWrapper?.removeAttribute("animate-full");
+      this.browserWrapper?.removeAttribute("animate-full-end");
+      this.browserWrapper?.removeAttribute("has-finished-animation");
+      this.overlay?.removeAttribute("post-fade-out");
+
+      const url = data.url;
+      const currentTab = gBrowser.selectedTab;
+
+      this.animatingOpen = true;
+      const browserElement = this.createBrowserElement(url, currentTab);
+
+      this.overlay = browserElement.closest(".browserSidebarContainer");
+      this.browserWrapper = browserElement.closest(".browserContainer");
+      this.contentWrapper = browserElement.closest(".browserStack");
+
+      this.browserWrapper.prepend(this.sidebarButtons);
+
+      this.overlay.classList.add("zen-glance-overlay");
+
+      this.browserWrapper.removeAttribute("animate-end");
+      window.requestAnimationFrame(() => {
+        this.quickOpenGlance();
+
+        this.browserWrapper.style.setProperty("--initial-x", `${initialX}px`);
+        this.browserWrapper.style.setProperty("--initial-y", `${initialY}px`);
+        this.browserWrapper.style.setProperty("--initial-width", initialWidth + "px");
+        this.browserWrapper.style.setProperty("--initial-height", initialHeight + "px");
+
+        this.overlay.removeAttribute("fade-out");
+        this.browserWrapper.setAttribute("animate", true);
+        this.#animating = true;
+        setTimeout(() => {
+          this.browserWrapper.setAttribute("animate-end", true);
+          this.browserWrapper.setAttribute("has-finished-animation", true);
+          this.#animating = false;
+          this.animatingOpen = false;
+        }, 500);
+      });
+    }
+
+    closeGlance({ noAnimation = false, onTabClose = false } = {}) {
+      if (this.#animating || !this.#currentBrowser || this.animatingOpen || this._duringOpening) {
+        return;
+      }
+
+      this.browserWrapper.removeAttribute("has-finished-animation");
+      if (noAnimation) {
+        this.quickCloseGlance({ closeCurrentTab: false });
+        this.#currentBrowser = null;
+        this.#currentTab = null;
+        return;
+      }
+
+      gBrowser._insertTabAtIndex(this.#currentTab, {
+        index: this.currentParentTab._tPos + 1,
+      });
+
+      let quikcCloseZen = false;
+      if (onTabClose) {
+        // Create new tab if no more ex
+        if (gBrowser.tabs.length === 1) {
+          gBrowser.selectedTab = gZenUIManager.openAndChangeToTab(Services.prefs.getStringPref('browser.startup.homepage'));
+          return;
+        } else if (gBrowser.selectedTab === this.#currentTab) {
+          this._duringOpening = true;
+          gBrowser.tabContainer.advanceSelectedTab(1, true); // to skip the current tab
+          this._duringOpening = false;
+          quikcCloseZen = true;
+        }
+      }
+
+      // do NOT touch here, I don't know what it does, but it works...
+      window.requestAnimationFrame(() => {
+        this.#currentTab.style.display = "none";
+        this.browserWrapper.removeAttribute("animate");
+        this.browserWrapper.removeAttribute("animate-end");
+        this.overlay.setAttribute("fade-out", true);
+        window.requestAnimationFrame(() => {
+          this.quickCloseGlance({ justAnimateParent: true });
+          this.browserWrapper.setAttribute("animate", true);
+          setTimeout(() => {
+            if (!this.currentParentTab) {
+              return;
+            }
+
+            if (!onTabClose || quikcCloseZen) {
+              this.quickCloseGlance();
+            }
+            this.overlay.removeAttribute("fade-out");
+            this.browserWrapper.removeAttribute("animate");
+
+            this.lastCurrentTab = this.#currentTab;
+
+            this.overlay.classList.remove("zen-glance-overlay");
+            gBrowser._getSwitcher().setTabStateNoAction(this.lastCurrentTab, gBrowser.AsyncTabSwitcher.STATE_UNLOADED);
+
+            if (!onTabClose && gBrowser.selectedTab === this.lastCurrentTab) {
+              this._duringOpening = true;
+              gBrowser.selectedTab = this.currentParentTab;
+            }
+
+            // reset everything
+            this.currentParentTab = null;
+            this.browserWrapper = null;
+            this.overlay = null;
+            this.contentWrapper = null;
+
+            this.lastCurrentTab.removeAttribute("zen-glance-tab");
+            this.lastCurrentTab._closingGlance = true;
+              
+            gBrowser.tabContainer._invalidateCachedTabs();
+            gBrowser.removeTab(this.lastCurrentTab, { animate: true });
+
+            this.#currentTab = null;
+            this.#currentBrowser = null;
+
+            this.lastCurrentTab = null;
+            this._duringOpening = false;            
+          }, 400);
+        });
+      });  
+    }
+
+    quickOpenGlance() {
+      if (!this.#currentBrowser || this._duringOpening) {
+        return;
+      }
+      this._duringOpening = true;
+      try {
+        gBrowser.selectedTab = this.#currentTab;
+      } catch (e) {}
+
+      this.currentParentTab.linkedBrowser.closest(".browserSidebarContainer").classList.add("deck-selected", "zen-glance-background");
+      this.currentParentTab.linkedBrowser.closest(".browserSidebarContainer").classList.remove("zen-glance-overlay");
+      this.currentParentTab.linkedBrowser.zenModeActive = true;
+      this.#currentBrowser.zenModeActive = true;
+      this.currentParentTab.linkedBrowser.docShellIsActive = true;
+      this.#currentBrowser.docShellIsActive = true;
+      this.#currentBrowser.setAttribute("zen-glance-selected", true);
+
+      this.currentParentTab._visuallySelected = true;
+      this.overlay.classList.add("deck-selected");
+
+      this._duringOpening = false;
+    }
+
+    quickCloseGlance({ closeCurrentTab = true, closeParentTab = true, justAnimateParent = false } = {}) {
+      const parentHasBrowser = !!(this.currentParentTab.linkedBrowser);
+      if (!justAnimateParent) { 
+        if (parentHasBrowser) {
+          if (closeParentTab) {
+            this.currentParentTab.linkedBrowser.closest(".browserSidebarContainer").classList.remove("deck-selected");
+          }
+          this.currentParentTab.linkedBrowser.zenModeActive = false;
+        }
+        this.#currentBrowser.zenModeActive = false;
+        if (closeParentTab && parentHasBrowser) {
+          this.currentParentTab.linkedBrowser.docShellIsActive = false;
+        }
+        if (closeCurrentTab) {
+          this.#currentBrowser.docShellIsActive = false;
+          this.overlay.classList.remove("deck-selected");
+        }
+        if (!this.currentParentTab._visuallySelected && closeParentTab) {
+          this.currentParentTab._visuallySelected = false;
+        }
+        this.#currentBrowser.removeAttribute("zen-glance-selected");
+      }
+      if (parentHasBrowser) {
+        this.currentParentTab.linkedBrowser.closest(".browserSidebarContainer").classList.remove("zen-glance-background");
+      }
+    }
+
+    onLocationChange(_) {
+      if (this._duringOpening) {
+        return;
+      }
+      if (gBrowser.selectedTab === this.#currentTab && !this.animatingOpen && !this._duringOpening && this.#currentBrowser) {
+        this.quickOpenGlance();
+        return;
+      }
+      if (gBrowser.selectedTab === this.currentParentTab && this.#currentBrowser) {
+        this.quickOpenGlance();
+      } else if ((!this.animatingFullOpen || this.animatingOpen) && this.#currentBrowser) {
+        this.closeGlance();
+      }
+    }
+
+    onTabClose(event) {
+      if (event.target === this.currentParentTab) {
+        this.closeGlance({ onTabClose: true });
+      }
+    }
+
+    fullyOpenGlance() {            
+      gBrowser._insertTabAtIndex(this.#currentTab, {
+        index: this.#currentTab._tPos + 1,
+      });
+
+      this.animatingFullOpen = true;
+      this.currentParentTab._visuallySelected = false;
+
+      this.browserWrapper.removeAttribute("has-finished-animation");
+      this.browserWrapper.setAttribute("animate-full", true);
+      this.#currentTab.removeAttribute("zen-glance-tab");
+      gBrowser.selectedTab = this.#currentTab;
+      this.currentParentTab.linkedBrowser.closest(".browserSidebarContainer").classList.remove("zen-glance-background");
+      setTimeout(() => {
+        window.requestAnimationFrame(() => {
+          this.browserWrapper.setAttribute("animate-full-end", true);
+          setTimeout(() => {
+            this.animatingFullOpen = false;
+            this.closeGlance({ noAnimation: true });
+          }, 600);
+        });
+      }, 300);
+    }
+
+    openGlanceForBookmark(event) {
+      const activationMethod = Services.prefs.getStringPref('zen.glance.activation-method', 'ctrl');
+
+      if (activationMethod === 'ctrl' && !event.ctrlKey) {
+        return;
+      } else if (activationMethod === 'alt' && !event.altKey) {
+        return;
+      } else if (activationMethod === 'shift' && !event.shiftKey) {
+        return;
+      } else if (activationMethod === 'meta' && !event.metaKey) {
+        return;
+      }else if (activationMethod === 'mantain' || typeof activationMethod === 'undefined') {
+        return;
+      }
+
+      event.preventDefault();
+      event.stopPropagation();
+
+      const rect = event.target.getBoundingClientRect();
+      const data = {
+        url: event.target._placesNode.uri,
+        x: rect.left,
+        y: rect.top,
+        width: rect.width,
+        height: rect.height,
+      };
+
+      this.openGlance(data);
+
+      return false;
+    }
+  }
+
+  window.gZenGlanceManager = new ZenGlanceManager();
+
+  function registerWindowActors() {
+    if (Services.prefs.getBoolPref("zen.glance.enabled", true)) {
+      gZenActorsManager.addJSWindowActor("ZenGlance", {
+        parent: {
+          esModuleURI: "chrome://browser/content/zen-components/actors/ZenGlanceParent.sys.mjs",
+        },
+        child: {
+          esModuleURI: "chrome://browser/content/zen-components/actors/ZenGlanceChild.sys.mjs",
+          events: {
+            DOMContentLoaded: {},
+          },
+        },
+      });
+    }
+  }
+
+  registerWindowActors();
+}

src/browser/base/zen-components/ZenGradientGenerator.mjs

@@ -0,0 +1,742 @@
+{
+  class ZenThemePicker extends ZenMultiWindowFeature {
+    static GRADIENT_IMAGE_URL = 'chrome://browser/content/zen-images/gradient.png';
+    static GRADIENT_DISPLAY_URL = 'chrome://browser/content/zen-images/gradient-display.png';
+    static MAX_DOTS = 5;
+
+    currentOpacity = 0.5;
+    currentRotation = 45;
+
+    numberOfDots = 0;
+
+    constructor() {
+      super();
+      if (!Services.prefs.getBoolPref('zen.theme.gradient', true) || !ZenWorkspaces.shouldHaveWorkspaces) {
+        return;
+      }
+      this.dragStartPosition = null;
+
+      ChromeUtils.defineLazyGetter(this, 'panel', () => document.getElementById('PanelUI-zen-gradient-generator'));
+      ChromeUtils.defineLazyGetter(this, 'toolbox', () => document.getElementById('TabsToolbar'));
+      ChromeUtils.defineLazyGetter(this, 'customColorInput', () => document.getElementById('PanelUI-zen-gradient-generator-custom-input'));
+      ChromeUtils.defineLazyGetter(this, 'customColorList', () => document.getElementById('PanelUI-zen-gradient-generator-custom-list'));    
+
+      XPCOMUtils.defineLazyPreferenceGetter(
+        this,
+        'allowWorkspaceColors',
+        'zen.theme.color-prefs.use-workspace-colors',
+        true,
+        this.onDarkModeChange.bind(this)
+      )
+
+      this.initRotation();
+      this.initCanvas();
+      this.initCustomColorInput();
+
+      ZenWorkspaces.addChangeListeners(this.onWorkspaceChange.bind(this));
+      window.matchMedia('(prefers-color-scheme: dark)').addListener(this.onDarkModeChange.bind(this));
+    }
+
+    get isDarkMode() {
+      return window.matchMedia('(prefers-color-scheme: dark)').matches;
+    }
+
+    async onDarkModeChange(event, skipUpdate = false) {
+      const currentWorkspace = await ZenWorkspaces.getActiveWorkspace();
+      this.onWorkspaceChange(currentWorkspace, skipUpdate);
+    }
+
+    initContextMenu() {
+      const menu = window.MozXULElement.parseXULToFragment(`
+        <menuitem id="zenToolbarThemePicker"
+                  data-lazy-l10n-id="zen-workspaces-change-gradient"
+                  oncommand="gZenThemePicker.openThemePicker(event);"/>
+      `);
+      document.getElementById('toolbar-context-customize').before(menu);
+    }
+
+    openThemePicker(event) {
+      PanelMultiView.openPopup(this.panel, this.toolbox, {
+        position: 'topright topleft',
+        triggerEvent: event,
+      });
+    }
+
+    initCanvas() {
+      this.image = new Image();
+      this.image.src = ZenThemePicker.GRADIENT_IMAGE_URL;
+
+      this.canvas = document.createElement('canvas');
+      this.panel.appendChild(this.canvas);
+      this.canvasCtx = this.canvas.getContext('2d');
+
+      // wait for the image to load
+      this.image.onload = this.onImageLoad.bind(this);
+    }
+
+    
+    onImageLoad() {
+      // resize the image to fit the panel
+      const imageSize = 300 - 20; // 20 is the padding (10px)
+      const scale = imageSize / Math.max(this.image.width, this.image.height);
+      this.image.width *= scale;
+      this.image.height *= scale;
+
+      this.canvas.width = this.image.width;
+      this.canvas.height = this.image.height;
+      this.canvasCtx.drawImage(this.image, 0, 0);
+
+      this.canvas.setAttribute('hidden', 'true');
+
+      // Call the rest of the initialization
+      this.initContextMenu();
+      this.initThemePicker();
+
+
+      this._hasInitialized = true;
+      this.onDarkModeChange(null);
+    }
+
+    initRotation() {
+      this.rotationInput = document.getElementById('PanelUI-zen-gradient-degrees');
+      this.rotationInputDot = this.rotationInput.querySelector('.dot');
+      this.rotationInputText = this.rotationInput.querySelector('.text');
+      this.rotationInputDot.addEventListener('mousedown', this.onRotationMouseDown.bind(this));
+      this.rotationInput.addEventListener('wheel', this.onRotationWheel.bind(this));
+    }
+
+    onRotationWheel(event) {
+      event.preventDefault();
+      const delta = event.deltaY;
+      const degrees = this.currentRotation + (delta > 0 ? 10 : -10);
+      this.setRotationInput(degrees);
+      this.updateCurrentWorkspace();
+    }
+
+    onRotationMouseDown(event) {
+      event.preventDefault();
+      this.rotationDragging = true;
+      this.rotationInputDot.style.zIndex = 2;
+      this.rotationInputDot.classList.add('dragging');
+      document.addEventListener('mousemove', this.onRotationMouseMove.bind(this));
+      document.addEventListener('mouseup', this.onRotationMouseUp.bind(this));
+    }
+
+    onRotationMouseUp(event) {
+      this.rotationDragging = false;
+      this.rotationInputDot.style.zIndex = 1;
+      this.rotationInputDot.classList.remove('dragging');
+      document.removeEventListener('mousemove', this.onRotationMouseMove.bind(this));
+      document.removeEventListener('mouseup', this.onRotationMouseUp.bind(this));
+    }
+
+    onRotationMouseMove(event) {
+      if (this.rotationDragging) {
+        event.preventDefault();
+        const rect = this.rotationInput.getBoundingClientRect();
+        // Make the dot follow the mouse in a circle, it can't go outside or inside the circle
+        const centerX = rect.left + rect.width / 2;
+        const centerY = rect.top + rect.height / 2;
+        const angle = Math.atan2(event.clientY - centerY, event.clientX - centerX);
+        const distance = Math.sqrt((event.clientX - centerX) ** 2 + (event.clientY - centerY) ** 2);
+        const radius = rect.width / 2;
+        let x = centerX + Math.cos(angle) * radius;
+        let y = centerY + Math.sin(angle) * radius;
+        if (distance > radius) {
+          x = event.clientX;
+          y = event.clientY;
+        }
+        const degrees = Math.round(Math.atan2(y - centerY, x - centerX) * 180 / Math.PI);
+        this.setRotationInput(degrees);
+        this.updateCurrentWorkspace();
+      }
+    }
+
+    setRotationInput(degrees) {
+      let fixedRotation = degrees;
+      while (fixedRotation < 0) {
+        fixedRotation += 360;
+      }
+      while (fixedRotation >= 360) {
+        fixedRotation -= 360;
+      }
+      this.currentRotation = degrees;
+      this.rotationInputDot.style.transform = `rotate(${degrees - 20}deg)`;
+      this.rotationInputText.textContent = `${fixedRotation}°`;
+    }
+    
+    initCustomColorInput() {
+      this.customColorInput.addEventListener('keydown', this.onCustomColorKeydown.bind(this));
+    }
+    
+    onCustomColorKeydown(event) {
+      //checks for enter key for custom colors
+      if (event.key === 'Enter') {
+        event.preventDefault();
+        this.addCustomColor();
+      }
+    }
+
+    initThemePicker() {
+      const themePicker = this.panel.querySelector('.zen-theme-picker-gradient');
+      themePicker.style.setProperty('--zen-theme-picker-gradient-image', `url(${ZenThemePicker.GRADIENT_DISPLAY_URL})`);
+      themePicker.addEventListener('mousemove', this.onDotMouseMove.bind(this));
+      themePicker.addEventListener('mouseup', this.onDotMouseUp.bind(this));
+      themePicker.addEventListener('click', this.onThemePickerClick.bind(this));
+    }
+
+    calculateInitialPosition(color) {
+      const [r, g, b] = color.c;
+      const imageData = this.canvasCtx.getImageData(0, 0, this.canvas.width, this.canvas.height);
+      // Find all pixels that are at least 90% similar to the color
+      const similarPixels = [];
+      for (let i = 0; i < imageData.data.length; i += 4) {
+        const pixelR = imageData.data[i];
+        const pixelG = imageData.data[i + 1];
+        const pixelB = imageData.data[i + 2];
+        if (Math.abs(r - pixelR) < 25 && Math.abs(g - pixelG) < 25 && Math.abs(b - pixelB) < 25) {
+          similarPixels.push(i);
+        }
+      }
+      // Check if there's an exact match
+      for (const pixel of similarPixels) {
+        const x = (pixel / 4) % this.canvas.width;
+        const y = Math.floor((pixel / 4) / this.canvas.width);
+        const pixelColor = this.getColorFromPosition(x, y);
+        if (pixelColor[0] === r && pixelColor[1] === g && pixelColor[2] === b) {
+          return {x: x / this.canvas.width, y: y / this.canvas.height};
+        }
+      }
+      // If there's no exact match, return the first similar pixel
+      const pixel = similarPixels[0];
+      const x = (pixel / 4) % this.canvas.width;
+      const y = Math.floor((pixel / 4) / this.canvas.width);
+      return {x: x / this.canvas.width, y: y / this.canvas.height};
+    }
+
+    getColorFromPosition(x, y) {
+      // get the color from the x and y from the image
+      const imageData = this.canvasCtx.getImageData(x, y, 1, 1);
+      return imageData.data;
+    }
+
+    createDot(color, fromWorkspace = false) {
+      const [r, g, b] = color.c;
+      const dot = document.createElement('div');
+      dot.classList.add('zen-theme-picker-dot');
+      if (color.isCustom) {
+        if (!color.c) {
+          return;
+        }
+        dot.classList.add('custom');
+        dot.style.opacity = 0;
+        dot.style.setProperty('--zen-theme-picker-dot-color', color.c);
+      } else {
+        dot.style.setProperty('--zen-theme-picker-dot-color', `rgb(${r}, ${g}, ${b})`);
+        const { x, y } = this.calculateInitialPosition(color);
+        dot.style.left = `${x * 100}%`;
+        dot.style.top = `${y * 100}%`;
+        dot.addEventListener('mousedown', this.onDotMouseDown.bind(this));
+      }
+      this.panel.querySelector('.zen-theme-picker-gradient').appendChild(dot);
+      if (!fromWorkspace) {
+        this.updateCurrentWorkspace(true);
+      }
+    }
+
+    onThemePickerClick(event) {
+      event.preventDefault();
+      
+      if (event.button !== 0 || this.dragging ) return;
+  
+      const gradient = this.panel.querySelector('.zen-theme-picker-gradient');
+      const rect = gradient.getBoundingClientRect();
+      const padding = 90; // each side
+      
+      const centerX = rect.left + rect.width / 2;
+      const centerY = rect.top + rect.height / 2;
+      const radius = (rect.width - padding) / 2;
+      let pixelX = event.clientX;
+      let pixelY = event.clientY;
+      
+      // Check if the click is within the circle
+      const distance = Math.sqrt((pixelX - centerX) ** 2 + (pixelY - centerY) ** 2);
+      if (distance > radius) {
+        return; // Don't create a dot if clicking outside the circle
+      }
+
+      // Check if we clicked on an existing dot
+      const clickedElement = event.target;
+      const isExistingDot = clickedElement.classList.contains('zen-theme-picker-dot');
+  
+      // Only proceed if not clicking on an existing dot
+      if (!isExistingDot) {
+        
+        const relativeX = event.clientX - rect.left;
+        const relativeY = event.clientY - rect.top;
+        
+        
+        const color = this.getColorFromPosition(relativeX, relativeY);
+  
+        // Create new dot
+        const dot = document.createElement('div');
+        dot.classList.add('zen-theme-picker-dot');
+        dot.addEventListener('mousedown', this.onDotMouseDown.bind(this));
+  
+        dot.style.left = `${relativeX}px`;
+        dot.style.top = `${relativeY}px`;
+        dot.style.setProperty('--zen-theme-picker-dot-color', `rgb(${color[0]}, ${color[1]}, ${color[2]})`);
+  
+        gradient.appendChild(dot);
+  
+        this.updateCurrentWorkspace(true);
+      }
+
+  }
+  
+  
+
+  onDotMouseDown(event) {
+    event.preventDefault();
+    if (event.button === 2) {
+      return;
+    }
+    this.dragging = true;
+    this.draggedDot = event.target;
+    this.draggedDot.style.zIndex = 1;
+    this.draggedDot.classList.add('dragging');
+    
+    // Store the starting position of the drag
+    this.dragStartPosition = {
+      x: event.clientX,
+      y: event.clientY
+    };
+  }
+
+
+    onDotMouseMove(event) {
+      if (this.dragging) {
+        event.preventDefault();
+        const rect = this.panel.querySelector('.zen-theme-picker-gradient').getBoundingClientRect();
+        const padding = 90; // each side
+        // do NOT let the ball be draged outside of an imaginary circle. You can drag it anywhere inside the circle
+        // if the distance between the center of the circle and the dragged ball is bigger than the radius, then the ball 
+        // should be placed on the edge of the circle. If it's inside the circle, then the ball just follows the mouse
+   
+        const centerX = rect.left + rect.width / 2;
+        const centerY = rect.top + rect.height / 2;
+        const radius = (rect.width - padding) / 2;
+        let pixelX = event.clientX;
+        let pixelY = event.clientY;
+        const distance = Math.sqrt((pixelX - centerX)  **2 + (pixelY - centerY)  **2);
+        if (distance > radius) {
+          const angle = Math.atan2(pixelY - centerY, pixelX - centerX);
+          pixelX = centerX + Math.cos(angle) * radius;
+          pixelY = centerY + Math.sin(angle) * radius;
+        }
+
+        // set the location of the dot in pixels
+        const relativeX = pixelX - rect.left;
+        const relativeY = pixelY - rect.top;
+        this.draggedDot.style.left = `${relativeX}px`;
+        this.draggedDot.style.top = `${relativeY}px`;
+        const color = this.getColorFromPosition(relativeX, relativeY);
+        this.draggedDot.style.setProperty('--zen-theme-picker-dot-color', `rgb(${color[0]}, ${color[1]}, ${color[2]})`);
+        this.updateCurrentWorkspace();
+      }
+    }
+
+    addColorToCustomList(color) {
+      const listItems = window.MozXULElement.parseXULToFragment(`
+        <hbox class="zen-theme-picker-custom-list-item">
+          <html:div class="zen-theme-picker-dot-custom"></html:div>
+          <label class="zen-theme-picker-custom-list-item-label"></label>
+          <toolbarbutton class="zen-theme-picker-custom-list-item-remove toolbarbutton-1" oncommand="gZenThemePicker.removeCustomColor(event);"></toolbarbutton>
+        </hbox>
+      `);
+      listItems.querySelector('.zen-theme-picker-custom-list-item').setAttribute('data-color', color);
+      listItems.querySelector('.zen-theme-picker-dot-custom').style.setProperty('--zen-theme-picker-dot-color', color);
+      listItems.querySelector('.zen-theme-picker-custom-list-item-label').textContent = color;
+
+      
+      this.customColorList.appendChild(listItems);
+    }
+
+    async addCustomColor() {
+      
+      const color = this.customColorInput.value;
+      if (!color) {
+        
+        return;
+      }
+    
+
+      // can be any color format, we just add it to the list as a dot, but hidden
+      const dot = document.createElement('div');
+      dot.classList.add('zen-theme-picker-dot', 'hidden', 'custom');
+      dot.style.opacity = 0;
+      dot.style.setProperty('--zen-theme-picker-dot-color', color);
+      this.panel.querySelector('.zen-theme-picker-gradient').appendChild(dot);
+      this.customColorInput.value = '';
+      await this.updateCurrentWorkspace();
+    }
+
+
+
+    onThemePickerClick(event) {
+      event.preventDefault();
+      
+      if (event.button !== 0 || this.dragging) return;
+  
+      const gradient = this.panel.querySelector('.zen-theme-picker-gradient');
+      const rect = gradient.getBoundingClientRect();
+      const padding = 90; // each side
+      
+      const centerX = rect.left + rect.width / 2;
+      const centerY = rect.top + rect.height / 2;
+      const radius = (rect.width - padding) / 2;
+      let pixelX = event.clientX;
+      let pixelY = event.clientY;
+      
+      // Check if the click is within the circle
+      const distance = Math.sqrt((pixelX - centerX) ** 2 + (pixelY - centerY) ** 2);
+      if (distance > radius) {
+        return; 
+      }
+
+      
+      const clickedElement = event.target;
+      const isExistingDot = clickedElement.classList.contains('zen-theme-picker-dot');
+  
+      
+      if (!isExistingDot && this.numberOfDots < ZenThemePicker.MAX_DOTS) {
+        const relativeX = event.clientX - rect.left;
+        const relativeY = event.clientY - rect.top;
+        
+        const color = this.getColorFromPosition(relativeX, relativeY);
+  
+        const dot = document.createElement('div');
+        dot.classList.add('zen-theme-picker-dot');
+        dot.addEventListener('mousedown', this.onDotMouseDown.bind(this));
+  
+        dot.style.left = `${relativeX}px`;
+        dot.style.top = `${relativeY}px`;
+        dot.style.setProperty('--zen-theme-picker-dot-color', `rgb(${color[0]}, ${color[1]}, ${color[2]})`);
+  
+        gradient.appendChild(dot);
+  
+        this.updateCurrentWorkspace(true);
+      }
+    }
+
+    onDotMouseDown(event) {
+      event.preventDefault();
+      if (event.button === 2) {
+        return;
+      }
+      this.dragging = true;
+      this.draggedDot = event.target;
+      this.draggedDot.style.zIndex = 1;
+      this.draggedDot.classList.add('dragging');
+      
+      // Store the starting position of the drag
+      this.dragStartPosition = {
+        x: event.clientX,
+        y: event.clientY
+      };
+    }
+
+    onDotMouseUp(event) {
+      if (event.button === 2) {
+        if (!event.target.classList.contains('zen-theme-picker-dot')) {
+          return;
+        }
+        event.target.remove();
+        this.updateCurrentWorkspace();
+        this.numberOfDots--;
+        return;
+      }
+
+      if (this.dragging) {
+        event.preventDefault();
+        event.stopPropagation(); 
+        this.dragging = false;
+        this.draggedDot.style.zIndex = 1;
+        this.draggedDot.classList.remove('dragging');
+        this.draggedDot = null;
+        this.dragStartPosition = null; // Reset the drag start position
+        return;
+      }
+
+      this.numberOfDots = this.panel.querySelectorAll('.zen-theme-picker-dot').length;
+    }
+
+
+    themedColors(colors) {
+      const isDarkMode = this.isDarkMode;
+      const factor = isDarkMode ? 0.5 : 1.1;
+      return colors.map(color => {
+        return {
+          c: color.isCustom ? color.c : [
+            Math.min(255, color.c[0] * factor),
+            Math.min(255, color.c[1] * factor),
+            Math.min(255, color.c[2] * factor),
+          ],
+          isCustom: color.isCustom,
+        }
+      });
+    }
+
+    onOpacityChange(event) {
+      this.currentOpacity = event.target.value;
+      this.updateCurrentWorkspace();
+    }
+
+    onTextureChange(event) {
+      this.currentTexture = event.target.value;
+      this.updateCurrentWorkspace();
+    }
+
+    getSingleRGBColor(color, forToolbar = false) {
+      if (color.isCustom) {
+        return color.c;
+      }
+      const toolbarBg = forToolbar ? 'var(--zen-themed-toolbar-bg)' : 'var(--zen-themed-toolbar-bg-transparent)';
+      return `color-mix(in srgb, rgb(${color.c[0]}, ${color.c[1]}, ${color.c[2]}) ${this.currentOpacity * 100}%, ${toolbarBg} ${(1 - this.currentOpacity) * 100}%)`;
+    }
+
+    getGradient(colors, forToolbar = false) {
+      const themedColors = this.themedColors(colors);
+      if (themedColors.length === 0) {
+        return forToolbar ? "var(--zen-themed-toolbar-bg)" : "var(--zen-themed-toolbar-bg-transparent)";
+      } else if (themedColors.length === 1) {
+        return this.getSingleRGBColor(themedColors[0], forToolbar);
+      }
+      return `linear-gradient(${this.currentRotation}deg, ${themedColors.map(color => this.getSingleRGBColor(color, forToolbar)).join(', ')})`;
+    }
+
+    getTheme(colors, opacity = 0.5, rotation = 45, texture = 0) {
+      return {
+        type: 'gradient',
+        gradientColors: colors.filter(color => color), // remove undefined
+        opacity,
+        rotation,
+        texture,
+      };
+    }
+    //TODO: add a better noise system that adds noise not just changes transparency
+    updateNoise(texture) {
+      const wrapper = document.getElementById('zen-main-app-wrapper');
+      wrapper.style.setProperty('--zen-grainy-background-opacity', texture);
+    }
+
+    hexToRgb(hex) {
+      if (hex.startsWith('#')) {
+        hex = hex.substring(1);
+      }
+      if (hex.length === 3) {
+        hex = hex.split('').map(char => char + char).join('');
+      }
+      return [
+        parseInt(hex.substring(0, 2), 16),
+        parseInt(hex.substring(2, 4), 16),
+        parseInt(hex.substring(4, 6), 16),
+      ];
+    }
+
+    pSBC=(p,c0,c1,l)=>{
+        let r,g,b,P,f,t,h,i=parseInt,m=Math.round,a=typeof(c1)=="string";
+        if(typeof(p)!="number"||p<-1||p>1||typeof(c0)!="string"||(c0[0]!='r'&&c0[0]!='#')||(c1&&!a))return null;
+        if(!this.pSBCr)this.pSBCr=(d)=>{
+          let n=d.length,x={};
+          if(n>9){
+            [r,g,b,a]=d=d.split(","),n=d.length;
+            if(n<3||n>4)return null;
+            x.r=i(r[3]=="a"?r.slice(5):r.slice(4)),x.g=i(g),x.b=i(b),x.a=a?parseFloat(a):-1
+          }else{
+            if(n==8||n==6||n<4)return null;
+            if(n<6)d="#"+d[1]+d[1]+d[2]+d[2]+d[3]+d[3]+(n>4?d[4]+d[4]:"");
+            d=i(d.slice(1),16);
+            if(n==9||n==5)x.r=d>>24&255,x.g=d>>16&255,x.b=d>>8&255,x.a=m((d&255)/0.255)/1000;
+            else x.r=d>>16,x.g=d>>8&255,x.b=d&255,x.a=-1
+          }return x};
+        h=c0.length>9,h=a?c1.length>9?true:c1=="c"?!h:false:h,f=this.pSBCr(c0),P=p<0,t=c1&&c1!="c"?this.pSBCr(c1):P?{r:0,g:0,b:0,a:-1}:{r:255,g:255,b:255,a:-1},p=P?p*-1:p,P=1-p;
+        if(!f||!t)return null;
+        if(l)r=m(P*f.r+p*t.r),g=m(P*f.g+p*t.g),b=m(P*f.b+p*t.b);
+        else r=m((P*f.r**2+p*t.r**2)**0.5),g=m((P*f.g**2+p*t.g**2)**0.5),b=m((P*f.b**2+p*t.b**2)**0.5);
+        a=f.a,t=t.a,f=a>=0||t>=0,a=f?a<0?t:t<0?a:a*P+t*p:0;
+        if(h)return"rgb"+(f?"a(":"(")+r+","+g+","+b+(f?","+m(a*1000)/1000:"")+")";
+        else return"#"+(4294967296+r*16777216+g*65536+b*256+(f?m(a*255):0)).toString(16).slice(1,f?undefined:-2)
+    }
+
+    getMostDominantColor(allColors) {
+      const colors = this.themedColors(allColors);
+      const themedColors = colors.filter(color => !color.isCustom);
+      if (themedColors.length === 0 || !this.allowWorkspaceColors) {
+        return null;
+      }
+      // get the most dominant color in the gradient
+      let dominantColor = themedColors[0].c;
+      let dominantColorCount = 0;
+      for (const color of themedColors) {
+        const count = themedColors.filter(c => c.c[0] === color.c[0] && c.c[1] === color.c[1] && c.c[2] === color.c[2]).length;
+        if (count > dominantColorCount) {
+          dominantColorCount = count;
+          dominantColor = color.c;
+        }
+      }
+      const result = this.pSBC(
+        this.isDarkMode ? 0.2 : -0.5, 
+        `rgb(${dominantColor[0]}, ${dominantColor[1]}, ${dominantColor[2]})`);
+      return result?.match(/\d+/g).map(Number);
+    }
+
+    async onWorkspaceChange(workspace, skipUpdate = false, theme = null) {
+      
+      const uuid = workspace.uuid;
+      // Use theme from workspace object or passed theme
+      let workspaceTheme = theme || workspace.theme;
+
+      await this.foreachWindowAsActive(async (browser) => {
+        if (!browser.gZenThemePicker._hasInitialized) {
+          return;
+        }
+        // Do not rebuild if the workspace is not the same as the current one
+        const windowWorkspace = await browser.ZenWorkspaces.getActiveWorkspace();
+        if (windowWorkspace.uuid !== uuid && theme !== null) {
+          return;
+        }
+
+        // get the theme from the window
+        workspaceTheme = theme || windowWorkspace.theme;
+
+        if (!skipUpdate) {
+          for (const dot of browser.gZenThemePicker.panel.querySelectorAll('.zen-theme-picker-dot')) {
+            dot.remove();
+          }
+        }
+    
+
+        const appWrapper = browser.document.getElementById('zen-main-app-wrapper');
+        if (!skipUpdate) {
+          appWrapper.removeAttribute('animating');
+          appWrapper.setAttribute('animating', 'true');
+          browser.document.body.style.setProperty('--zen-main-browser-background-old',
+            browser.document.body.style.getPropertyValue('--zen-main-browser-background')
+          );
+          browser.window.requestAnimationFrame(() => {
+            setTimeout(() => {
+              appWrapper.removeAttribute('animating');
+            }, 500);
+          });
+        }
+
+        browser.gZenThemePicker.resetCustomColorList();
+        if (!workspaceTheme || workspaceTheme.type !== 'gradient') {
+          const gradient = browser.gZenThemePicker.getGradient([]);
+          const gradientToolbar = browser.gZenThemePicker.getGradient([], true);
+          browser.document.documentElement.style.setProperty('--zen-main-browser-background', gradient);
+          browser.document.documentElement.style.setProperty('--zen-main-browser-background-toolbar', gradientToolbar);
+          browser.gZenThemePicker.updateNoise(0);
+          browser.document.documentElement.style.setProperty('--zen-primary-color', this.getNativeAccentColor());
+          return;
+        }
+
+        browser.gZenThemePicker.currentOpacity = workspaceTheme.opacity ?? 0.5;
+        browser.gZenThemePicker.currentRotation = workspaceTheme.rotation ?? 45;
+        browser.gZenThemePicker.currentTexture = workspaceTheme.texture ?? 0;
+
+        browser.gZenThemePicker.numberOfDots = workspaceTheme.gradientColors.length;
+
+        browser.document.getElementById('PanelUI-zen-gradient-generator-opacity').value = browser.gZenThemePicker.currentOpacity;
+        browser.document.getElementById('PanelUI-zen-gradient-generator-texture').value = browser.gZenThemePicker.currentTexture;
+        browser.gZenThemePicker.setRotationInput(browser.gZenThemePicker.currentRotation);
+
+        const gradient = browser.gZenThemePicker.getGradient(workspaceTheme.gradientColors);
+        const gradientToolbar = browser.gZenThemePicker.getGradient(workspaceTheme.gradientColors, true);
+        browser.gZenThemePicker.updateNoise(workspaceTheme.texture);
+        
+        for (const dot of workspaceTheme.gradientColors) {
+          if (dot.isCustom) {
+            browser.gZenThemePicker.addColorToCustomList(dot.c);
+          }
+        }
+
+        browser.document.documentElement.style.setProperty('--zen-main-browser-background', gradient);
+        browser.document.documentElement.style.setProperty('--zen-main-browser-background-toolbar', gradientToolbar);
+
+        const dominantColor = this.getMostDominantColor(workspaceTheme.gradientColors);
+        if (dominantColor) {
+          browser.document.documentElement.style.setProperty('--zen-primary-color', `rgb(${dominantColor[0]}, ${dominantColor[1]}, ${dominantColor[2]})`);
+        }
+
+        if (!skipUpdate) {
+          browser.gZenThemePicker.recalculateDots(workspaceTheme.gradientColors);
+        }
+      });
+    }
+
+    getNativeAccentColor() {
+      return Services.prefs.getStringPref('zen.theme.accent-color');
+    }
+
+    resetCustomColorList() {
+      this.customColorList.innerHTML = '';
+    }
+
+    removeCustomColor(event) {
+      const target = event.target.closest('.zen-theme-picker-custom-list-item');
+      const color = target.getAttribute('data-color');
+      const dots = this.panel.querySelectorAll('.zen-theme-picker-dot');
+      for (const dot of dots) {
+        if (dot.style.getPropertyValue('--zen-theme-picker-dot-color') === color) {
+          dot.remove();
+          break;
+        }
+      }
+      target.remove();
+      this.updateCurrentWorkspace();
+    }
+
+    recalculateDots(colors) {
+      //THIS IS PART OF THE ISSUE
+      for (const color of colors) {
+        this.createDot(color, true);
+      }
+    }
+
+    async updateCurrentWorkspace(skipSave = true) {
+
+      this.updated = skipSave;
+      const dots = this.panel.querySelectorAll('.zen-theme-picker-dot');
+      const colors = Array.from(dots).map(dot => {
+        const color = dot.style.getPropertyValue('--zen-theme-picker-dot-color');
+        if (color === 'undefined') {
+          return;
+        }
+        const isCustom = dot.classList.contains('custom');
+        return {c: isCustom ? color : color.match(/\d+/g).map(Number), isCustom};
+      });
+      const gradient = this.getTheme(colors, this.currentOpacity, this.currentRotation, this.currentTexture);
+      let currentWorkspace = await ZenWorkspaces.getActiveWorkspace();
+
+      if(!skipSave) {
+        await ZenWorkspacesStorage.saveWorkspaceTheme(currentWorkspace.uuid, gradient);
+        await ZenWorkspaces._propagateWorkspaceData();
+        ConfirmationHint.show(document.getElementById("PanelUI-menu-button"), "zen-panel-ui-gradient-generator-saved-message");
+        currentWorkspace = await ZenWorkspaces.getActiveWorkspace();
+      }
+
+      await this.onWorkspaceChange(currentWorkspace, true, skipSave ? gradient : null);
+    }
+
+    async handlePanelClose() {
+      if(this.updated) {
+        await this.updateCurrentWorkspace(false);
+      }
+
+    }
+  }
+
+  window.ZenThemePicker = ZenThemePicker;
+}

src/browser/base/zen-components/ZenPinnedTabManager.mjs

@@ -0,0 +1,485 @@
+{
+  const lazy = {};
+
+  class ZenPinnedTabsObserver {
+    static ALL_EVENTS = ['TabPinned', 'TabUnpinned', 'TabClose'];
+
+    #listeners = [];
+
+    constructor() {
+      XPCOMUtils.defineLazyPreferenceGetter(lazy, 'zenPinnedTabRestorePinnedTabsToPinnedUrl', 'zen.pinned-tab-manager.restore-pinned-tabs-to-pinned-url', false);
+      XPCOMUtils.defineLazyPreferenceGetter(lazy, 'zenPinnedTabCloseShortcutBehavior', 'zen.pinned-tab-manager.close-shortcut-behavior', 'switch');
+      ChromeUtils.defineESModuleGetters(lazy, {E10SUtils: "resource://gre/modules/E10SUtils.sys.mjs"});
+      this.#listenPinnedTabEvents();
+    }
+
+    #listenPinnedTabEvents() {
+      const eventListener = this.#eventListener.bind(this);
+      for (const event of ZenPinnedTabsObserver.ALL_EVENTS) {
+        window.addEventListener(event, eventListener);
+      }
+      window.addEventListener('unload', () => {
+        for (const event of ZenPinnedTabsObserver.ALL_EVENTS) {
+          window.removeEventListener(event, eventListener);
+        }
+      });
+    }
+
+    #eventListener(event) {
+      for (const listener of this.#listeners) {
+        listener(event.type, event);
+      }
+    }
+
+    addPinnedTabListener(listener) {
+      this.#listeners.push(listener);
+    }
+  }
+
+  class ZenPinnedTabManager extends ZenPreloadedFeature {
+
+    init() {
+      if (!this.enabled) {
+        return;
+      }
+      this.observer = new ZenPinnedTabsObserver();
+      this._initClosePinnedTabShortcut();
+      this._insertItemsIntoTabContextMenu();
+      this.observer.addPinnedTabListener(this._onPinnedTabEvent.bind(this));
+
+      this._zenClickEventListener = this._onTabClick.bind(this);
+    }
+
+    async initTabs() {
+      if (!this.enabled) {
+        return;
+      }
+      await ZenPinnedTabsStorage.init();
+    }
+
+    get enabled() {
+      if (typeof this._enabled === 'undefined') {
+        this._enabled = !(
+          document.documentElement.hasAttribute('privatebrowsingmode') ||
+          document.documentElement.getAttribute('chromehidden')?.includes('toolbar') ||
+          document.documentElement.getAttribute('chromehidden')?.includes('menubar')
+        );
+      }
+      return this._enabled;
+    }
+
+    async _refreshPinnedTabs() {
+      await this._initializePinsCache();
+      this._initializePinnedTabs();
+    }
+
+    async _initializePinsCache() {
+      try {
+        // Get pin data
+        const pins = await ZenPinnedTabsStorage.getPins();
+
+        // Enhance pins with favicons
+        const enhancedPins = await Promise.all(pins.map(async pin => {
+          try {
+            const faviconData = await PlacesUtils.promiseFaviconData(pin.url);
+            return {
+              ...pin,
+              iconUrl: faviconData?.uri?.spec || null
+            };
+          } catch(ex) {
+            // If favicon fetch fails, continue without icon
+            return {
+              ...pin,
+              iconUrl: null
+            };
+          }
+        }));
+
+        this._pinsCache = enhancedPins.sort((a, b) => {
+          if (!a.workspaceUuid && b.workspaceUuid) return -1;
+          if (a.workspaceUuid && !b.workspaceUuid) return 1;
+          return 0;
+        });
+
+      } catch (ex) {
+        console.error("Failed to initialize pins cache:", ex);
+        this._pinsCache = [];
+      }
+
+      return this._pinsCache;
+    }
+
+    _initializePinnedTabs() {
+      const pins = this._pinsCache;
+      if (!pins?.length) {
+        return;
+      }
+
+      const activeTab = gBrowser.selectedTab;
+      const pinnedTabsByUUID = new Map();
+      const pinsToCreate = new Set(pins.map(p => p.uuid));
+
+      // First pass: identify existing tabs and remove those without pins
+      for (let tab of gBrowser.tabs) {
+        const pinId = tab.getAttribute("zen-pin-id");
+        if (!pinId) {
+          continue;
+        }
+
+        if (pinsToCreate.has(pinId)) {
+          // This is a valid pinned tab that matches a pin
+          pinnedTabsByUUID.set(pinId, tab);
+          pinsToCreate.delete(pinId);
+        } else {
+          // This is a pinned tab that no longer has a corresponding pin
+          gBrowser.removeTab(tab);
+        }
+      }
+
+      // Second pass: create new tabs for pins that don't have tabs
+      for (let pin of pins) {
+        if (!pinsToCreate.has(pin.uuid)) {
+          continue; // Skip pins that already have tabs
+        }
+
+        let newTab = gBrowser.addTrustedTab(pin.url, {
+          skipAnimation: true,
+          userContextId: pin.containerTabId || 0,
+          allowInheritPrincipal: false,
+          createLazyBrowser: true,
+          skipLoad: true,
+        });
+
+        // Set the favicon from cache
+        if (!!pin.iconUrl) {
+          // TODO: Figure out if there is a better way -
+          //  calling gBrowser.setIcon messes shit up and should be avoided. I think this works for now.
+          newTab.setAttribute("image", pin.iconUrl);
+        }
+
+        newTab.setAttribute("zen-pin-id", pin.uuid);
+        gBrowser.setInitialTabTitle(newTab, pin.title);
+
+        if (pin.workspaceUuid) {
+          newTab.setAttribute("zen-workspace-id", pin.workspaceUuid);
+        }
+
+        if (pin.isEssential) {
+          newTab.setAttribute("zen-essential", "true");
+        }
+
+        gBrowser.pinTab(newTab);
+      }
+
+      // Restore active tab
+      if (!activeTab.closing) {
+        gBrowser.selectedTab = activeTab;
+      }
+    }
+
+    _onPinnedTabEvent(action, event) {
+      if (!this.enabled) return;
+      const tab = event.target;
+      switch (action) {
+        case "TabPinned":
+          tab._zenClickEventListener = this._zenClickEventListener;
+          tab.addEventListener("click", tab._zenClickEventListener);
+          this._setPinnedAttributes(tab);
+          break;
+        case "TabUnpinned":
+          this._removePinnedAttributes(tab);
+          if (tab._zenClickEventListener) {
+            tab.removeEventListener("click", tab._zenClickEventListener);
+            delete tab._zenClickEventListener;
+          }
+          break;
+        case "TabClose":
+          this._removePinnedAttributes(tab);
+          break;
+        default:
+          console.warn('ZenPinnedTabManager: Unhandled tab event', action);
+          break;
+      }
+    }
+
+    _onTabClick(e) {
+      const tab = e.target?.closest("tab");
+      if (e.button === 1 && tab) {
+        this._onCloseTabShortcut(e, tab);
+      }
+    }
+
+    async resetPinnedTab(tab) {
+
+      if (!tab) {
+        tab = TabContextMenu.contextTab;
+      }
+
+      if (!tab || !tab.pinned) {
+        return;
+      }
+
+      await this._resetTabToStoredState(tab);
+    }
+
+    async replacePinnedUrlWithCurrent() {
+      const tab = TabContextMenu.contextTab;
+      if (!tab || !tab.pinned || !tab.getAttribute("zen-pin-id")) {
+        return;
+      }
+
+      const browser = tab.linkedBrowser;
+
+      const pin = this._pinsCache.find(pin => pin.uuid === tab.getAttribute("zen-pin-id"));
+
+      if (!pin) {
+        return;
+      }
+
+      const userContextId = tab.getAttribute("usercontextid");
+
+      pin.title = tab.label || browser.contentTitle;
+      pin.url = browser.currentURI.spec;
+      pin.workspaceUuid = tab.getAttribute("zen-workspace-id");
+      pin.userContextId = userContextId ? parseInt(userContextId, 10) : 0;
+
+      await ZenPinnedTabsStorage.savePin(pin);
+      await this._refreshPinnedTabs();
+    }
+
+    async _setPinnedAttributes(tab) {
+
+      if (tab.hasAttribute("zen-pin-id")) {
+        return;
+      }
+
+      const browser = tab.linkedBrowser;
+
+      const uuid = gZenUIManager.generateUuidv4();
+      const userContextId = tab.getAttribute("usercontextid");
+
+      let entry = null;
+
+      if(tab.getAttribute("zen-pinned-entry")) {
+        entry = JSON.parse(tab.getAttribute("zen-pinned-entry"));
+      }
+
+      await ZenPinnedTabsStorage.savePin({
+        uuid,
+        title: entry?.title || tab.label || browser.contentTitle,
+        url: entry?.url || browser.currentURI.spec,
+        containerTabId: userContextId ? parseInt(userContextId, 10) : 0,
+        workspaceUuid: tab.getAttribute("zen-workspace-id"),
+        isEssential: tab.getAttribute("zen-essential") === "true"
+      });
+
+      tab.setAttribute("zen-pin-id", uuid);
+
+      // This is used while migrating old pins to new system - we don't want to refresh when migrating
+      if (tab.getAttribute("zen-pinned-entry")) {
+        tab.removeAttribute("zen-pinned-entry");
+        return;
+      }
+
+      await this._refreshPinnedTabs();
+    }
+
+    async _removePinnedAttributes(tab) {
+      if(!tab.getAttribute("zen-pin-id")) {
+        return;
+      }
+
+      await ZenPinnedTabsStorage.removePin(tab.getAttribute("zen-pin-id"));
+
+      tab.removeAttribute("zen-pin-id");
+
+      if(!tab.hasAttribute("zen-workspace-id") && ZenWorkspaces.workspaceEnabled) {
+        const workspace = await ZenWorkspaces.getActiveWorkspace();
+        tab.setAttribute("zen-workspace-id", workspace.uuid);
+      }
+
+      await this._refreshPinnedTabs();
+    }
+
+    _initClosePinnedTabShortcut() {
+      let cmdClose = document.getElementById('cmd_close');
+
+      if (cmdClose) {
+        cmdClose.addEventListener('command', this._onCloseTabShortcut.bind(this));
+      }
+    }
+
+    _onCloseTabShortcut(event, selectedTab = gBrowser.selectedTab) {
+      if (
+          !selectedTab?.pinned
+      ) {
+        return;
+      }
+
+      event.stopPropagation();
+      event.preventDefault();
+
+      const behavior = lazy.zenPinnedTabCloseShortcutBehavior;
+
+      switch (behavior) {
+        case 'close':
+          gBrowser.removeTab(selectedTab, { animate: true });
+          break;
+        case 'reset-unload-switch':
+        case 'unload-switch':
+        case 'reset-switch':
+        case 'switch':
+          this._handleTabSwitch(selectedTab);
+          if (behavior.includes('reset')) {
+            this._resetTabToStoredState(selectedTab);
+          }
+          if (behavior.includes('unload')) {
+            gBrowser.discardBrowser(selectedTab);
+          }
+          break;
+        case 'reset':
+          this._resetTabToStoredState(selectedTab);
+          break;
+        default:
+          return;
+      }
+    }
+
+    _handleTabSwitch(selectedTab) {
+      if(selectedTab !== gBrowser.selectedTab) {
+        return;
+      }
+      const findNextTab = (direction) =>
+          gBrowser.tabContainer.findNextTab(selectedTab, {
+            direction,
+            filter: tab => !tab.hidden && !tab.pinned,
+          });
+
+      let nextTab = findNextTab(1) || findNextTab(-1);
+
+      if (!nextTab) {
+        ZenWorkspaces._createNewTabForWorkspace({ uuid: ZenWorkspaces.activeWorkspace  });
+
+        nextTab = findNextTab(1) || findNextTab(-1);
+      }
+
+      if (nextTab) {
+        gBrowser.selectedTab = nextTab;
+      }
+    }
+
+    async _resetTabToStoredState(tab) {
+      const id = tab.getAttribute("zen-pin-id");
+
+      if (!id) {
+        return;
+      }
+
+      const pin = this._pinsCache.find(pin => pin.uuid === id);
+
+      if (pin) {
+        const tabState = SessionStore.getTabState(tab);
+        const state = JSON.parse(tabState);
+        let icon = undefined;
+        try {
+          icon = await PlacesUtils.promiseFaviconData(pin.url);
+        } catch (e) {
+          console.warn("Error trying to get favicon for pinned tab", e);
+        }
+
+        state.entries = [{
+          url: pin.url,
+          title: pin.title,
+          triggeringPrincipal_base64: lazy.E10SUtils.SERIALIZED_SYSTEMPRINCIPAL
+        }];
+        if (icon instanceof Ci.nsIURI || typeof icon === "string") {
+          state.image = icon;
+        } else {
+          state.image = null;
+        }
+        state.index = 0;
+
+        SessionStore.setTabState(tab, state);
+      }
+    }
+
+    addToEssentials() {
+      const tabs = TabContextMenu.contextTab.multiselected ? gBrowser.selectedTabs : [TabContextMenu.contextTab];
+      for (let i = 0; i < tabs.length; i++) {
+        const tab = tabs[i];
+        tab.setAttribute("zen-essential", "true");
+        if(tab.hasAttribute("zen-workspace-id")) {
+          tab.removeAttribute("zen-workspace-id");
+        }
+        if (tab.pinned) {
+          gBrowser.unpinTab(tab);
+        }
+        gBrowser.pinTab(tab);
+      }
+    }
+
+    removeEssentials() {
+      const tabs = TabContextMenu.contextTab.multiselected ? gBrowser.selectedTabs : [TabContextMenu.contextTab];
+      for (let i = 0; i < tabs.length; i++) {
+        const tab = tabs[i];
+        tab.removeAttribute("zen-essential");
+        if(ZenWorkspaces.workspaceEnabled && ZenWorkspaces.getActiveWorkspaceFromCache.uuid) {
+          tab.setAttribute("zen-workspace-id", ZenWorkspaces.getActiveWorkspaceFromCache.uuid);
+        }
+        gBrowser.unpinTab(tab);
+      }
+    }
+
+    _insertItemsIntoTabContextMenu() {
+      const elements = window.MozXULElement.parseXULToFragment(`
+            <menuseparator id="context_zen-pinned-tab-separator" hidden="true"/>
+            <menuitem id="context_zen-replace-pinned-url-with-current"
+                      data-lazy-l10n-id="tab-context-zen-replace-pinned-url-with-current"
+                      hidden="true"
+                      oncommand="gZenPinnedTabManager.replacePinnedUrlWithCurrent();"/>
+            <menuitem id="context_zen-reset-pinned-tab"
+                      data-lazy-l10n-id="tab-context-zen-reset-pinned-tab"
+                      hidden="true"
+                      oncommand="gZenPinnedTabManager.resetPinnedTab();"/>
+        `);
+      document.getElementById('tabContextMenu').appendChild(elements);
+
+      const element = window.MozXULElement.parseXULToFragment(`
+            <menuitem id="context_zen-add-essential"
+                      data-lazy-l10n-id="tab-context-zen-add-essential"
+                      hidden="true"
+                      oncommand="gZenPinnedTabManager.addToEssentials();"/>
+            <menuitem id="context_zen-remove-essential"
+                      data-lazy-l10n-id="tab-context-zen-remove-essential"
+                      hidden="true"
+                      oncommand="gZenPinnedTabManager.removeEssentials();"/>
+        `);
+
+      document.getElementById('context_pinTab')?.after(element);
+    }
+
+    resetPinnedTabData(tabData) {
+      if (lazy.zenPinnedTabRestorePinnedTabsToPinnedUrl && tabData.pinned && tabData.zenPinnedEntry) {
+        tabData.entries = [JSON.parse(tabData.zenPinnedEntry)];
+        tabData.image = tabData.zenPinnedIcon;
+        tabData.index = 0;
+      }
+    }
+
+    updatePinnedTabContextMenu(contextTab) {
+      if (!this.enabled) {
+        return;
+      }
+      const isVisible = contextTab.pinned  && !contextTab.multiselected;
+      document.getElementById("context_zen-reset-pinned-tab").hidden = !isVisible || !contextTab.getAttribute("zen-pin-id");
+      document.getElementById("context_zen-replace-pinned-url-with-current").hidden = !isVisible;
+      document.getElementById("context_zen-add-essential").hidden = contextTab.getAttribute("zen-essential");
+      document.getElementById("context_zen-remove-essential").hidden = !contextTab.getAttribute("zen-essential");
+      document.getElementById("context_unpinTab").hidden = document.getElementById("context_unpinTab").hidden || contextTab.getAttribute("zen-essential");
+      document.getElementById("context_unpinSelectedTabs").hidden = document.getElementById("context_unpinSelectedTabs").hidden || contextTab.getAttribute("zen-essential");
+      document.getElementById("context_zen-pinned-tab-separator").hidden = !isVisible;
+    }
+  }
+
+  window.gZenPinnedTabManager = new ZenPinnedTabManager();
+}

src/browser/base/zen-components/ZenPinnedTabsStorage.mjs

@@ -0,0 +1,341 @@
+var ZenPinnedTabsStorage = {
+  async init() {
+    console.log('ZenPinnedTabsStorage: Initializing...');
+    await this._ensureTable();
+  },
+
+  async _ensureTable() {
+    await PlacesUtils.withConnectionWrapper('ZenPinnedTabsStorage._ensureTable', async (db) => {
+      // Create the pins table if it doesn't exist
+      await db.execute(`
+        CREATE TABLE IF NOT EXISTS zen_pins (
+      id INTEGER PRIMARY KEY,
+      uuid TEXT UNIQUE NOT NULL,
+      title TEXT NOT NULL,
+      url TEXT,
+      container_id INTEGER,
+      workspace_uuid TEXT,
+      position INTEGER NOT NULL DEFAULT 0,
+      is_essential BOOLEAN NOT NULL DEFAULT 0,
+      is_group BOOLEAN NOT NULL DEFAULT 0,
+      parent_uuid TEXT,
+      created_at INTEGER NOT NULL,
+      updated_at INTEGER NOT NULL,
+      FOREIGN KEY (parent_uuid) REFERENCES zen_pins(uuid) ON DELETE SET NULL
+          )
+      `);
+
+
+      // Create indices
+      await db.execute(`
+        CREATE INDEX IF NOT EXISTS idx_zen_pins_uuid ON zen_pins(uuid)
+      `);
+
+      await db.execute(`
+        CREATE INDEX IF NOT EXISTS idx_zen_pins_parent_uuid ON zen_pins(parent_uuid)
+      `);
+
+      // Create the changes tracking table if it doesn't exist
+      await db.execute(`
+        CREATE TABLE IF NOT EXISTS zen_pins_changes (
+          uuid TEXT PRIMARY KEY,
+          timestamp INTEGER NOT NULL
+        )
+      `);
+
+      // Create an index on the uuid column for changes tracking table
+      await db.execute(`
+        CREATE INDEX IF NOT EXISTS idx_zen_pins_changes_uuid ON zen_pins_changes(uuid)
+      `);
+
+      await gZenPinnedTabManager._refreshPinnedTabs();
+    });
+  },
+
+  /**
+   * Private helper method to notify observers with a list of changed UUIDs.
+   * @param {string} event - The observer event name.
+   * @param {Array<string>} uuids - Array of changed workspace UUIDs.
+   */
+  _notifyPinsChanged(event, uuids) {
+    if (uuids.length === 0) return; // No changes to notify
+
+    // Convert the array of UUIDs to a JSON string
+    const data = JSON.stringify(uuids);
+
+    Services.obs.notifyObservers(null, event, data);
+  },
+
+  async savePin(pin, notifyObservers = true) {
+    const changedUUIDs = new Set();
+
+    await PlacesUtils.withConnectionWrapper('ZenPinnedTabsStorage.savePin', async (db) => {
+      await db.executeTransaction(async () => {
+        const now = Date.now();
+
+        let newPosition;
+        if ('position' in pin && Number.isFinite(pin.position)) {
+          newPosition = pin.position;
+        } else {
+          // Get the maximum position within the same parent group (or null for root level)
+          const maxPositionResult = await db.execute(`
+            SELECT MAX("position") as max_position
+            FROM zen_pins
+            WHERE COALESCE(parent_uuid, '') = COALESCE(:parent_uuid, '')
+          `, { parent_uuid: pin.parentUuid || null });
+          const maxPosition = maxPositionResult[0].getResultByName('max_position') || 0;
+          newPosition = maxPosition + 1000;
+        }
+
+        // Insert or replace the pin
+        await db.executeCached(`
+          INSERT OR REPLACE INTO zen_pins (
+            uuid, title, url, container_id, workspace_uuid, position,
+            is_essential, is_group, parent_uuid, created_at, updated_at
+          ) VALUES (
+            :uuid, :title, :url, :container_id, :workspace_uuid, :position,
+            :is_essential, :is_group, :parent_uuid,
+            COALESCE((SELECT created_at FROM zen_pins WHERE uuid = :uuid), :now),
+            :now
+          )
+        `, {
+          uuid: pin.uuid,
+          title: pin.title,
+          url: pin.isGroup ? null : pin.url,
+          container_id: pin.containerTabId || null,
+          workspace_uuid: pin.workspaceUuid || null,
+          position: newPosition,
+          is_essential: pin.isEssential || false,
+          is_group: pin.isGroup || false,
+          parent_uuid: pin.parentUuid || null,
+          now
+        });
+
+        await db.execute(`
+          INSERT OR REPLACE INTO zen_pins_changes (uuid, timestamp)
+          VALUES (:uuid, :timestamp)
+        `, {
+          uuid: pin.uuid,
+          timestamp: Math.floor(now / 1000)
+        });
+
+        changedUUIDs.add(pin.uuid);
+        await this.updateLastChangeTimestamp(db);
+      });
+    });
+
+    if (notifyObservers) {
+      this._notifyPinsChanged("zen-pin-updated", Array.from(changedUUIDs));
+    }
+  },
+
+  async getPins() {
+    const db = await PlacesUtils.promiseDBConnection();
+    const rows = await db.executeCached(`
+      SELECT * FROM zen_pins
+      ORDER BY parent_uuid NULLS FIRST, position ASC
+    `);
+    return rows.map((row) => ({
+      uuid: row.getResultByName('uuid'),
+      title: row.getResultByName('title'),
+      url: row.getResultByName('url'),
+      containerTabId: row.getResultByName('container_id'),
+      workspaceUuid: row.getResultByName('workspace_uuid'),
+      position: row.getResultByName('position'),
+      isEssential: Boolean(row.getResultByName('is_essential')),
+      isGroup: Boolean(row.getResultByName('is_group')),
+      parentUuid: row.getResultByName('parent_uuid')
+    }));
+  },
+
+  async getGroupChildren(groupUuid) {
+    const db = await PlacesUtils.promiseDBConnection();
+    const rows = await db.executeCached(`
+      SELECT * FROM zen_pins 
+      WHERE parent_uuid = :groupUuid 
+      ORDER BY position ASC
+    `, { groupUuid });
+
+    return rows.map((row) => ({
+      uuid: row.getResultByName('uuid'),
+      title: row.getResultByName('title'),
+      url: row.getResultByName('url'),
+      containerTabId: row.getResultByName('container_id'),
+      workspaceUuid: row.getResultByName('workspace_uuid'),
+      position: row.getResultByName('position'),
+      isEssential: Boolean(row.getResultByName('is_essential')),
+      isGroup: Boolean(row.getResultByName('is_group')),
+      parentUuid: row.getResultByName('parent_uuid')
+    }));
+  },
+
+  async removePin(uuid, notifyObservers = true) {
+    const changedUUIDs = [uuid];
+
+    await PlacesUtils.withConnectionWrapper('ZenPinnedTabsStorage.removePin', async (db) => {
+      await db.executeTransaction(async () => {
+        // Get all child UUIDs first for change tracking
+        const children = await db.execute(
+            `SELECT uuid FROM zen_pins WHERE parent_uuid = :uuid`,
+            { uuid }
+        );
+
+        // Add child UUIDs to changedUUIDs array
+        for (const child of children) {
+          changedUUIDs.push(child.getResultByName('uuid'));
+        }
+
+        // Delete all children in a single statement
+        await db.execute(
+            `DELETE FROM zen_pins WHERE parent_uuid = :uuid`,
+            { uuid }
+        );
+
+        // Delete the pin/group itself
+        await db.execute(
+            `DELETE FROM zen_pins WHERE uuid = :uuid`,
+            { uuid }
+        );
+
+        // Record the changes
+        const now = Math.floor(Date.now() / 1000);
+        for (const changedUuid of changedUUIDs) {
+          await db.execute(`
+            INSERT OR REPLACE INTO zen_pins_changes (uuid, timestamp)
+            VALUES (:uuid, :timestamp)
+          `, {
+            uuid: changedUuid,
+            timestamp: now
+          });
+        }
+
+        await this.updateLastChangeTimestamp(db);
+      });
+    });
+
+    if (notifyObservers) {
+      this._notifyPinsChanged("zen-pin-removed", changedUUIDs);
+    }
+  },
+
+  async wipeAllPins() {
+    await PlacesUtils.withConnectionWrapper('ZenPinnedTabsStorage.wipeAllPins', async (db) => {
+      await db.execute(`DELETE FROM zen_pins`);
+      await db.execute(`DELETE FROM zen_pins_changes`);
+      await this.updateLastChangeTimestamp(db);
+    });
+  },
+
+  async markChanged(uuid) {
+    await PlacesUtils.withConnectionWrapper('ZenPinnedTabsStorage.markChanged', async (db) => {
+      const now = Date.now();
+      await db.execute(`
+        INSERT OR REPLACE INTO zen_pins_changes (uuid, timestamp)
+        VALUES (:uuid, :timestamp)
+      `, {
+        uuid,
+        timestamp: Math.floor(now / 1000)
+      });
+    });
+  },
+
+  async getChangedIDs() {
+    const db = await PlacesUtils.promiseDBConnection();
+    const rows = await db.execute(`
+      SELECT uuid, timestamp FROM zen_pins_changes
+    `);
+    const changes = {};
+    for (const row of rows) {
+      changes[row.getResultByName('uuid')] = row.getResultByName('timestamp');
+    }
+    return changes;
+  },
+
+  async clearChangedIDs() {
+    await PlacesUtils.withConnectionWrapper('ZenPinnedTabsStorage.clearChangedIDs', async (db) => {
+      await db.execute(`DELETE FROM zen_pins_changes`);
+    });
+  },
+
+  shouldReorderPins(before, current, after) {
+    const minGap = 1; // Minimum allowed gap between positions
+    return (before !== null && current - before < minGap) || (after !== null && after - current < minGap);
+  },
+
+  async reorderAllPins(db, changedUUIDs) {
+    const pins = await db.execute(`
+      SELECT uuid
+      FROM zen_pins
+      ORDER BY position ASC
+    `);
+
+    for (let i = 0; i < pins.length; i++) {
+      const newPosition = (i + 1) * 1000; // Use large increments
+      await db.execute(`
+        UPDATE zen_pins
+        SET position = :newPosition
+        WHERE uuid = :uuid
+      `, { newPosition, uuid: pins[i].getResultByName('uuid') });
+      changedUUIDs.add(pins[i].getResultByName('uuid'));
+    }
+  },
+
+  async updateLastChangeTimestamp(db) {
+    const now = Date.now();
+    await db.execute(`
+      INSERT OR REPLACE INTO moz_meta (key, value)
+      VALUES ('zen_pins_last_change', :now)
+    `, { now });
+  },
+
+  async getLastChangeTimestamp() {
+    const db = await PlacesUtils.promiseDBConnection();
+    const result = await db.executeCached(`
+      SELECT value FROM moz_meta WHERE key = 'zen_pins_last_change'
+    `);
+    return result.length ? parseInt(result[0].getResultByName('value'), 10) : 0;
+  },
+
+  async updatePinPositions(pins) {
+    const changedUUIDs = new Set();
+
+    await PlacesUtils.withConnectionWrapper('ZenPinnedTabsStorage.updatePinPositions', async (db) => {
+      await db.executeTransaction(async () => {
+        const now = Date.now();
+
+        for (let i = 0; i < pins.length; i++) {
+          const pin = pins[i];
+          const newPosition = (i + 1) * 1000;
+
+          await db.execute(`
+            UPDATE zen_pins
+            SET position = :newPosition
+            WHERE uuid = :uuid
+          `, { newPosition, uuid: pin.uuid });
+
+          changedUUIDs.add(pin.uuid);
+
+          // Record the change
+          await db.execute(`
+            INSERT OR REPLACE INTO zen_pins_changes (uuid, timestamp)
+            VALUES (:uuid, :timestamp)
+          `, {
+            uuid: pin.uuid,
+            timestamp: Math.floor(now / 1000)
+          });
+        }
+
+        await this.updateLastChangeTimestamp(db);
+      });
+    });
+
+    this._notifyPinsChanged("zen-pin-updated", Array.from(changedUUIDs));
+  },
+
+  async __dropTables() {
+    await PlacesUtils.withConnectionWrapper('ZenPinnedTabsStorage.__dropTables', async (db) => {
+      await db.execute(`DROP TABLE IF EXISTS zen_pins`);
+      await db.execute(`DROP TABLE IF EXISTS zen_pins_changes`);
+    });
+  }
+};

src/browser/base/zen-components/ZenProfileDialogUI.mjs

@@ -0,0 +1,138 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+var ZenProfileDialogUI = {
+  showSubView(parent, event) {
+    let element = parent.querySelector('.zen-side-bar-profiles-button-panel-correction') || parent;
+    PanelUI.showSubView('PanelUI-zen-profiles', element, event);
+    this._updateProfilesList();
+    this._updateCurentProfileId();
+  },
+
+  _updateProfilesList() {
+    let parentList = document.getElementById('PanelUI-zen-profiles-list');
+    this._emptyUserList(parentList);
+    if (this._getProfilesSize(ProfileService.profiles) <= 1) {
+      return;
+    }
+    parentList.appendChild(document.createElement('toolbarseparator'));
+    for (let profile of ProfileService.profiles) {
+      if (profile == ProfileService.currentProfile) {
+        continue;
+      }
+      let item = document.createElement('div');
+      item.onclick = () => this._openProfile(profile);
+      item.className = 'PanelUI-zen-profiles-item';
+      let avatar = document.createElement('img');
+      avatar.className = 'PanelUI-zen-profiles-item-avatar';
+      let name = document.createElement('div');
+      name.className = 'PanelUI-zen-profiles-item-name';
+      name.appendChild(document.createTextNode(profile.name));
+      name.container = true;
+      avatar.setAttribute('src', ZenThemeModifier._getThemedAvatar(profile.zenAvatarPath));
+      item.appendChild(avatar);
+      item.appendChild(name);
+      parentList.appendChild(item);
+    }
+  },
+
+  _emptyUserList(element) {
+    element.innerHTML = '';
+  },
+
+  _updateCurentProfileId() {
+    let currentProfile = ProfileService.currentProfile;
+    if (!currentProfile) return;
+    let nameContainer = document.getElementById('PanelUI-zen-profiles-current-name');
+    nameContainer.textContent = currentProfile.name;
+  },
+
+  _openProfile(profile) {
+    Services.startup.createInstanceWithProfile(profile);
+  },
+
+  _getProfilesSize(profiles) {
+    let size = 0;
+    for (let _ of profiles) {
+      size += 1;
+    }
+    return size;
+  },
+
+  createProfileWizard() {
+    // This should be rewritten in HTML eventually.
+    // TODO: it could be `window.browsingContext.topChromeWindow.gDialogBox.open` but it does not work with the callback?
+    window.browsingContext.topChromeWindow.openDialog(
+      'chrome://mozapps/content/profile/createProfileWizard.xhtml',
+      '',
+      'centerscreen,chrome,modal,titlebar',
+      ProfileService,
+      {
+        CreateProfile: async (profile) => {
+          try {
+            ProfileService.defaultProfile = profile;
+            this._flush();
+            this._openProfile(profile);
+          } catch (e) {
+            // This can happen on dev-edition.
+            let [title, msg] = await document.l10n.formatValues([
+              { id: 'profiles-cannot-set-as-default-title' },
+              { id: 'profiles-cannot-set-as-default-message' },
+            ]);
+
+            Services.prompt.alert(window, title, msg);
+          }
+        },
+      }
+    );
+  },
+
+  async _flush() {
+    try {
+      ProfileService.flush();
+      this._updateProfilesList();
+    } catch (e) {
+      let [title, msg, button] = await document.l10n.formatValues([
+        { id: 'profiles-flush-fail-title' },
+        {
+          id: e.result == Cr.NS_ERROR_DATABASE_CHANGED ? 'profiles-flush-conflict' : 'profiles-flush-failed',
+        },
+        { id: 'profiles-flush-restart-button' },
+      ]);
+
+      const PS = Ci.nsIPromptService;
+      let result = Services.prompt.confirmEx(
+        window,
+        title,
+        msg,
+        PS.BUTTON_POS_0 * PS.BUTTON_TITLE_CANCEL + PS.BUTTON_POS_1 * PS.BUTTON_TITLE_IS_STRING,
+        null,
+        button,
+        null,
+        null,
+        {}
+      );
+      if (result == 1) {
+        this._restart(false);
+      }
+    }
+  },
+
+  _restart(safeMode) {
+    let cancelQuit = Cc['@mozilla.org/supports-PRBool;1'].createInstance(Ci.nsISupportsPRBool);
+    Services.obs.notifyObservers(cancelQuit, 'quit-application-requested', 'restart');
+
+    if (cancelQuit.data) {
+      return;
+    }
+
+    let flags = Ci.nsIAppStartup.eAttemptQuit | Ci.nsIAppStartup.eRestart;
+
+    if (safeMode) {
+      Services.startup.restartInSafeMode(flags);
+    } else {
+      Services.startup.quit(flags);
+    }
+  },
+};

src/browser/base/zen-components/ZenSidebarManager.mjs

@@ -0,0 +1,788 @@
+class ZenBrowserManagerSidebar extends ZenDOMOperatedFeature {
+  _sidebarElement = null;
+  _currentPanel = null;
+  _lastOpenedPanel = null;
+  _hasChangedConfig = true;
+  _splitterElement = null;
+  _hSplitterElement = null;
+  _hasRegisteredPinnedClickOutside = false;
+  _isDragging = false;
+  contextTab = null;
+  sidebar = null;
+  forwardButton = null;
+  backButton = null;
+  progressListener = null;
+  _tabBrowserSet = new WeakMap();
+  tabBox;
+
+  DEFAULT_MOBILE_USER_AGENT = `Mozilla/5.0 (Android 12; Mobile; rv:129.0) Gecko/20100101 Firefox/${AppConstants.ZEN_FIREFOX_VERSION}`;
+  MAX_SIDEBAR_PANELS = Services.prefs.getIntPref('zen.sidebar.max-webpanels');
+  
+  init() {
+    ChromeUtils.defineLazyGetter(this, 'sidebar', () => document.getElementById('zen-sidebar-web-panel'));
+    ChromeUtils.defineLazyGetter(this, 'forwardButton', () => document.getElementById('zen-sidebar-web-panel-forward'));
+    ChromeUtils.defineLazyGetter(this, 'backButton', () => document.getElementById('zen-sidebar-web-panel-back'));
+    ChromeUtils.defineLazyGetter(this, 'tabBox', () => document.getElementById('tabbrowser-tabbox'));
+
+    this.onlySafeWidthAndHeight();
+
+    this.initProgressListener();
+    this.update();
+    this.close(); // avoid caching
+    this.listenForPrefChanges();
+    this.insertIntoContextMenu();
+    this.addPositioningListeners();
+  }
+
+  onlySafeWidthAndHeight() {
+    const panel = document.getElementById('zen-sidebar-web-panel');
+    const width = panel.style.width;
+    const height = panel.style.height;
+    panel.setAttribute('style', '');
+    panel.style.width = width;
+    panel.style.height = height;
+  }
+
+  initProgressListener() {
+    this.progressListener = {
+      QueryInterface: ChromeUtils.generateQI(['nsIWebProgressListener', 'nsISupportsWeakReference']),
+      onLocationChange: function (aWebProgress, aRequest, aLocation, aFlags) {
+        const browser = this._getCurrentBrowser();
+        if (!browser) return;
+        const forwardDisabled = this.forwardButton.hasAttribute('disabled');
+        const backDisabled = this.backButton.hasAttribute('disabled');
+
+        if (browser.canGoForward === forwardDisabled) {
+          if (browser.canGoForward) {
+            this.forwardButton.removeAttribute('disabled');
+          } else {
+            this.forwardButton.setAttribute('disabled', true);
+          }
+        }
+        if (browser.canGoBack === backDisabled) {
+          if (browser.canGoBack) {
+            this.backButton.removeAttribute('disabled');
+          } else {
+            this.backButton.setAttribute('disabled', true);
+          }
+        }
+      }.bind(gZenBrowserManagerSidebar),
+    };
+  }
+
+  get sidebarData() {
+    let services = Services.prefs.getStringPref('zen.sidebar.data');
+    if (services === '') {
+      return {};
+    }
+    return JSON.parse(services);
+  }
+
+  get shouldCloseOnBlur() {
+    return Services.prefs.getBoolPref('zen.sidebar.close-on-blur');
+  }
+
+  listenForPrefChanges() {
+    Services.prefs.addObserver('zen.sidebar.data', this.handleEvent.bind(this));
+    Services.prefs.addObserver('zen.sidebar.enabled', this.handleEvent.bind(this));
+
+    this.handleEvent();
+  }
+
+  addPositioningListeners() {
+    this.sidebar
+      .querySelectorAll('.zen-sidebar-web-panel-splitter')
+      .forEach((s) => s.addEventListener('mousedown', this.handleSplitterMouseDown.bind(this)));
+    this.sidebarHeader.addEventListener('mousedown', this.handleDragPanel.bind(this));
+    window.addEventListener('resize', this.onWindowResize.bind(this));
+  }
+
+  handleSplitterMouseDown(mouseDownEvent) {
+    if (this._isDragging) return;
+    this._isDragging = true;
+
+    const isHorizontal = mouseDownEvent.target.getAttribute('orient') === 'horizontal';
+    setCursor(isHorizontal ? 'n-resize' : 'ew-resize');
+    const reverse = ['left', 'top'].includes(mouseDownEvent.target.getAttribute('side'));
+    const direction = isHorizontal ? 'height' : 'width';
+    const axis = isHorizontal ? 'Y' : 'X';
+
+    const computedStyle = window.getComputedStyle(this.sidebar);
+    const maxSize = parseInt(computedStyle.getPropertyValue(`max-${direction}`).match(/(\d+)px/)?.[1]) || Infinity;
+    const minSize = parseInt(computedStyle.getPropertyValue(`min-${direction}`).match(/(\d+)px/)?.[1]) || 0;
+
+    const sidebarSizeStart = this.sidebar.getBoundingClientRect()[direction];
+
+    const startPos = mouseDownEvent[`screen${axis}`];
+
+    const toAdjust = isHorizontal ? 'top' : 'left';
+    const sidebarPosStart = parseInt(this.sidebar.style[toAdjust].match(/\d+/));
+
+    let mouseMove = function (e) {
+      let mouseMoved = e[`screen${axis}`] - startPos;
+      if (reverse) {
+        mouseMoved *= -1;
+      }
+      let newSize = sidebarSizeStart + mouseMoved;
+      let currentMax = maxSize;
+      const wrapperBox = this.sidebarWrapper.getBoundingClientRect();
+      let maxWrapperSize = Infinity;
+      if (this.isFloating) {
+        maxWrapperSize = reverse ? sidebarPosStart + sidebarSizeStart : wrapperBox[direction] - sidebarPosStart;
+      }
+      newSize = Math.max(minSize, Math.min(currentMax, maxWrapperSize, newSize));
+
+      window.requestAnimationFrame(() => {
+        if (reverse) {
+          const actualMoved = newSize - sidebarSizeStart;
+          this.sidebar.style[toAdjust] = sidebarPosStart - actualMoved + 'px';
+        }
+        this.sidebar.style[direction] = `${newSize}px`;
+      });
+    }.bind(this);
+
+    document.addEventListener('mousemove', mouseMove);
+    document.addEventListener(
+      'mouseup',
+      () => {
+        document.removeEventListener('mousemove', mouseMove);
+        this._isDragging = false;
+        setCursor('auto');
+      },
+      { once: true }
+    );
+  }
+
+  handleDragPanel(mouseDownEvent) {
+    if (this.sidebarHeaderButtons.find((b) => b.contains(mouseDownEvent.target))) {
+      return;
+    }
+    this._isDragging = true;
+    const startTop = this.sidebar.style.top?.match(/\d+/)?.[0] || 0;
+    const startLeft = this.sidebar.style.left?.match(/\d+/)?.[0] || 0;
+
+    const sidebarBBox = this.sidebar.getBoundingClientRect();
+    const sideBarHeight = sidebarBBox.height;
+    const sideBarWidth = sidebarBBox.width;
+
+    const topMouseOffset = startTop - mouseDownEvent.screenY;
+    const leftMouseOffset = startLeft - mouseDownEvent.screenX;
+    const moveListener = (mouseMoveEvent) => {
+      window.requestAnimationFrame(() => {
+        let top = mouseMoveEvent.screenY + topMouseOffset;
+        let left = mouseMoveEvent.screenX + leftMouseOffset;
+
+        const wrapperBounds = this.sidebarWrapper.getBoundingClientRect();
+        top = Math.max(0, Math.min(top, wrapperBounds.height - sideBarHeight));
+        left = Math.max(0, Math.min(left, wrapperBounds.width - sideBarWidth));
+
+        this.sidebar.style.top = top + 'px';
+        this.sidebar.style.left = left + 'px';
+      });
+    };
+
+    document.addEventListener('mousemove', moveListener);
+    document.addEventListener(
+      'mouseup',
+      () => {
+        document.removeEventListener('mousemove', moveListener);
+        this._isDragging = false;
+      },
+      { once: true }
+    );
+  }
+
+  onWindowResize() {
+    if (!this.isFloating) return;
+    const top = parseInt(this.sidebar.style.top?.match(/\d+/)?.[0] || 0);
+    const left = parseInt(this.sidebar.style.left?.match(/\d+/)?.[0] || 0);
+    const wrapperRect = this.sidebarWrapper.getBoundingClientRect();
+    const sidebarRect = this.sidebar.getBoundingClientRect();
+
+    if (sidebarRect.height < wrapperRect.height && top + sidebarRect.height > wrapperRect.height) {
+      this.sidebar.style.top = wrapperRect.height - sidebarRect.height + 'px';
+    }
+    if (sidebarRect.width < wrapperRect.width && left + sidebarRect.width > wrapperRect.width) {
+      this.sidebar.style.left = wrapperRect.width - sidebarRect.width + 'px';
+    }
+  }
+
+  get isFloating() {
+    return document.getElementById('zen-sidebar-web-panel').hasAttribute('pinned');
+  }
+
+  handleEvent() {
+    this._hasChangedConfig = true;
+    this.update();
+    this._hasChangedConfig = false;
+
+    // https://stackoverflow.com/questions/11565471/removing-event-listener-which-was-added-with-bind
+    var clickOutsideHandler = this._handleClickOutside.bind(this);
+    let isFloating = this.isFloating;
+    if (isFloating && !this._hasRegisteredPinnedClickOutside) {
+      document.addEventListener('mouseup', clickOutsideHandler);
+      this._hasRegisteredPinnedClickOutside = true;
+    } else if (!isFloating && this._hasRegisteredPinnedClickOutside) {
+      document.removeEventListener('mouseup', clickOutsideHandler);
+      this._hasRegisteredPinnedClickOutside = false;
+    }
+
+    const button = document.getElementById('zen-sidepanel-button');
+    if (!button) return;
+    if (Services.prefs.getBoolPref('zen.sidebar.enabled')) {
+      button.removeAttribute('hidden');
+    } else {
+      button.setAttribute('hidden', 'true');
+      this._closeSidebarPanel();
+      return;
+    }
+  }
+
+  _handleClickOutside(event) {
+    let sidebar = document.getElementById('zen-sidebar-web-panel');
+    if (!sidebar.hasAttribute('pinned') || this._isDragging || !this.shouldCloseOnBlur) {
+      return;
+    }
+    let target = event.target;
+    const closestSelector = [
+      '#zen-sidebar-web-panel',
+      '#zen-sidebar-panels-wrapper',
+      '#zenWebPanelContextMenu',
+      '#zen-sidebar-web-panel-splitter',
+      '#contentAreaContextMenu',
+    ].join(', ');
+    if (target.closest(closestSelector)) {
+      return;
+    }
+    this.close();
+  }
+
+  toggle() {
+    if (!this._currentPanel) {
+      this._currentPanel = this._lastOpenedPanel;
+    }
+    if (document.getElementById('zen-sidebar-web-panel').hasAttribute('hidden')) {
+      this.open();
+      return;
+    }
+    this.close();
+  }
+
+  open() {
+    let sidebar = document.getElementById('zen-sidebar-web-panel');
+    if (!this.sidebar.hasAttribute('pinned')) {
+      this.moveToTabBoxWrapper();
+    }
+    sidebar.removeAttribute('hidden');
+    this.update();
+  }
+
+  update() {
+    this._updateWebPanels();
+    this._updateSidebarButton();
+    this._updateWebPanel();
+    this._updateButtons();
+  }
+
+  _updateSidebarButton() {
+    let button = document.getElementById('zen-sidepanel-button');
+    if (!button) return;
+    if (!document.getElementById('zen-sidebar-web-panel').hasAttribute('hidden')) {
+      button.setAttribute('open', 'true');
+    } else {
+      button.removeAttribute('open');
+    }
+  }
+
+  _updateWebPanels() {
+    if (Services.prefs.getBoolPref('zen.sidebar.enabled')) {
+      this.sidebarElement.removeAttribute('hidden');
+    } else {
+      this.sidebarElement.setAttribute('hidden', 'true');
+      this._closeSidebarPanel();
+      return;
+    }
+
+    let data = this.sidebarData;
+    if (!data.data || !data.index) {
+      return;
+    }
+    this.sidebarElement.innerHTML = '';
+    for (let site of data.index) {
+      let panel = data.data[site];
+      if (!panel || !panel.url) {
+        continue;
+      }
+      let button = document.createXULElement('toolbarbutton');
+      button.classList.add('zen-sidebar-panel-button', 'toolbarbutton-1', 'chromeclass-toolbar-additional');
+      button.setAttribute('flex', '1');
+      button.setAttribute('zen-sidebar-id', site);
+      button.setAttribute('context', 'zenWebPanelContextMenu');
+      this._getWebPanelIcon(panel.url, button);
+      button.addEventListener('click', this._handleClick.bind(this));
+      button.addEventListener('dragstart', this._handleDragStart.bind(this));
+      button.addEventListener('dragover', this._handleDragOver.bind(this));
+      button.addEventListener('dragenter', this._handleDragEnter.bind(this));
+      button.addEventListener('dragend', this._handleDragEnd.bind(this));
+      this.sidebarElement.appendChild(button);
+    }
+    const addButton = document.getElementById('zen-sidebar-add-panel-button');
+    if (data.index.length < this.MAX_SIDEBAR_PANELS) {
+      addButton.removeAttribute('hidden');
+    } else {
+      addButton.setAttribute('hidden', 'true');
+    }
+  }
+
+  async _openAddPanelDialog() {
+    let dialogURL = 'chrome://browser/content/places/zenNewWebPanel.xhtml';
+    let features = 'centerscreen,chrome,modal,resizable=no';
+    let aParentWindow = Services.wm.getMostRecentWindow('navigator:browser');
+
+    if (aParentWindow?.gDialogBox) {
+      await aParentWindow.gDialogBox.open(dialogURL, {});
+    } else {
+      aParentWindow.openDialog(dialogURL, '', features, {});
+    }
+  }
+
+  _setPinnedToElements() {
+    let sidebar = document.getElementById('zen-sidebar-web-panel');
+    sidebar.setAttribute('pinned', 'true');
+    document.getElementById('zen-sidebar-web-panel-pinned').setAttribute('pinned', 'true');
+  }
+
+  _removePinnedFromElements() {
+    let sidebar = document.getElementById('zen-sidebar-web-panel');
+    sidebar.removeAttribute('pinned');
+    document.getElementById('zen-sidebar-web-panel-pinned').removeAttribute('pinned');
+  }
+
+  _closeSidebarPanel() {
+    let sidebar = document.getElementById('zen-sidebar-web-panel');
+    sidebar.setAttribute('hidden', 'true');
+    this._lastOpenedPanel = this._currentPanel;
+    this._currentPanel = null;
+  }
+
+  _handleClick(event) {
+    let target = event.target;
+    let panelId = target.getAttribute('zen-sidebar-id');
+    if (this._currentPanel === panelId) {
+      return;
+    }
+    this._currentPanel = panelId;
+    this._updateWebPanel();
+  }
+
+  _handleDragStart(event) {
+    this.__dragingElement = event.target;
+    this.__dragingIndex = Array.prototype.indexOf.call(event.target.parentNode.children, event.target);
+    event.target.style.opacity = '0.7';
+
+    event.dataTransfer.effectAllowed = 'move';
+    event.dataTransfer.setData('text/html', event.target.innerHTML);
+    event.dataTransfer.setData('text/plain', event.target.id);
+  }
+
+  _handleDragOver(event) {}
+
+  _handleDragEnter(event) {
+    if (typeof this.__dragingElement === 'undefined') {
+      return;
+    }
+    const target = event.target;
+    const elIndex = Array.prototype.indexOf.call(target.parentNode.children, target);
+    if (elIndex < this.__dragingIndex) {
+      target.before(this.__dragingElement);
+      this.__dragingIndex = elIndex - 1;
+    }
+    target.after(this.__dragingElement);
+    this.__dragingIndex = elIndex + 1;
+  }
+
+  _handleDragEnd(event) {
+    event.target.style.opacity = '1';
+
+    let data = this.sidebarData;
+    let newPos = [];
+    for (let element of this.__dragingElement.parentNode.children) {
+      let panelId = element.getAttribute('zen-sidebar-id');
+      newPos.push(panelId);
+    }
+    data.index = newPos;
+    Services.prefs.setStringPref('zen.sidebar.data', JSON.stringify(data));
+    this._currentPanel = this.__dragingElement.getAttribute('zen-sidebar-id');
+    this.open();
+    this.__dragingElement = undefined;
+  }
+
+  _createNewPanel(url) {
+    let data = this.sidebarData;
+    let newName = 'p' + new Date().getTime();
+    data.index.push(newName);
+    data.data[newName] = {
+      url: url,
+      ua: false,
+    };
+    Services.prefs.setStringPref('zen.sidebar.data', JSON.stringify(data));
+    this._currentPanel = newName;
+    this.open();
+  }
+
+  _updateButtons() {
+    for (let button of this.sidebarElement.querySelectorAll('.zen-sidebar-panel-button')) {
+      if (button.getAttribute('zen-sidebar-id') === this._currentPanel) {
+        button.setAttribute('selected', 'true');
+      } else {
+        button.removeAttribute('selected');
+      }
+    }
+  }
+
+  _hideAllWebPanels() {
+    let sidebar = document.getElementById('zen-sidebar-web-panel');
+    for (let browser of sidebar.querySelectorAll('browser[zen-sidebar-id]')) {
+      browser.setAttribute('hidden', 'true');
+      browser.docShellIsActive = false;
+      browser.zenModeActive = false;
+    }
+  }
+
+  get introductionPanel() {
+    return document.getElementById('zen-sidebar-introduction-panel');
+  }
+
+  _updateWebPanel() {
+    this._updateButtons();
+    // let sidebar = document.getElementById("zen-sidebar-web-panel");
+    this._hideAllWebPanels();
+    if (!this._currentPanel) {
+      this.introductionPanel.removeAttribute('hidden');
+      this.forwardButton.setAttribute('disabled', true);
+      this.backButton.setAttribute('disabled', true);
+      return;
+    }
+    this.introductionPanel.setAttribute('hidden', 'true');
+    let existantWebview = this._getCurrentBrowser();
+    if (existantWebview) {
+      existantWebview.docShellIsActive = true;
+      existantWebview.zenModeActive = true;
+      existantWebview.removeAttribute('hidden');
+      document.getElementById('zen-sidebar-web-panel-title').textContent = existantWebview.contentTitle;
+      return;
+    }
+    let data = this._getWebPanelData(this._currentPanel);
+    let browser = this._createWebPanelBrowser(data);
+    let browserContainers = document.getElementById('zen-sidebar-web-panel-browser-containers');
+    browserContainers.appendChild(browser);
+    browser.addProgressListener(this.progressListener, Ci.nsIWebProgress.NOTIFY_LOCATION);
+    if (data.ua) {
+      browser.browsingContext.customUserAgent = this.DEFAULT_MOBILE_USER_AGENT;
+      browser.reload();
+    }
+    browser.docShellIsActive = true;
+    browser.zenModeActive = true;
+  }
+
+  _getWebPanelData(id) {
+    let data = this.sidebarData;
+    let panel = data.data[id];
+    if (!panel || !panel.url) {
+      return {};
+    }
+    return {
+      id: id,
+      ...panel,
+    };
+  }
+
+  getTabForBrowser(browser) {
+    return this._tabBrowserSet.get(browser);
+  }
+
+  setTabForBrowser(browser, tab) {
+    this._tabBrowserSet.set(browser, tab);
+  }
+
+  removeTabForBrowser(browser) {
+    this._tabBrowserSet.delete(browser);
+  }
+
+  _createWebPanelBrowser(data) {
+    const titleContainer = document.getElementById('zen-sidebar-web-panel-title');
+    titleContainer.textContent = 'Loading...';
+    let browser = gBrowser.createBrowser({
+      userContextId: data.userContextId,
+    });
+    const tab = this.sidebar.querySelector(`[zen-sidebar-id='${data.id}']`);
+    this.setTabForBrowser(browser, tab);
+    tab.linkedBrowser = browser;
+    tab.permanentKey = browser.permanentKey;
+    browser.setAttribute('disablefullscreen', 'true');
+    browser.setAttribute('src', data.url);
+    browser.setAttribute('zen-sidebar-id', data.id);
+    browser.addEventListener(
+      'pagetitlechanged',
+      function (event) {
+        let browser = event.target;
+        let title = browser.contentTitle;
+        if (!title) {
+          return;
+        }
+        let id = browser.getAttribute('zen-sidebar-id');
+        if (id === this._currentPanel) {
+          titleContainer.textContent = title;
+        }
+      }.bind(this)
+    );
+    return browser;
+  }
+
+  _getWebPanelIcon(url, element) {
+    let { preferredURI } = Services.uriFixup.getFixupURIInfo(url);
+    element.setAttribute('image', `page-icon:${preferredURI.spec}`);
+    fetch(`https://s2.googleusercontent.com/s2/favicons?domain_url=${preferredURI.spec}`).then(async (response) => {
+      if (response.ok) {
+        let blob = await response.blob();
+        let reader = new FileReader();
+        reader.onload = function () {
+          element.setAttribute('image', reader.result);
+        };
+        reader.readAsDataURL(blob);
+      }
+    });
+  }
+
+  _getBrowserById(id) {
+    let sidebar = document.getElementById('zen-sidebar-web-panel');
+    return sidebar.querySelector(`browser[zen-sidebar-id="${id}"]`);
+  }
+
+  _getCurrentBrowser() {
+    return this._getBrowserById(this._currentPanel);
+  }
+
+  reload() {
+    let browser = this._getCurrentBrowser();
+    if (browser) {
+      browser.reload();
+    }
+  }
+
+  forward() {
+    let browser = this._getCurrentBrowser();
+    if (browser) {
+      browser.goForward();
+    }
+  }
+
+  back() {
+    let browser = this._getCurrentBrowser();
+    if (browser) {
+      browser.goBack();
+    }
+  }
+
+  home() {
+    let browser = this._getCurrentBrowser();
+    if (browser) {
+      browser.gotoIndex();
+    }
+  }
+
+  close() {
+    this._hideAllWebPanels();
+    this._closeSidebarPanel();
+    this._updateSidebarButton();
+  }
+
+  moveToTabBoxWrapper() {
+    this.tabBox.before(this.sidebarWrapper);
+    this.sidebarWrapper.style.order = '';
+  }
+
+  moveToTabBox() {
+    this.tabBox.prepend(this.sidebarWrapper);
+  }
+
+  togglePinned(elem) {
+    if (this.sidebar.hasAttribute('pinned')) {
+      this._removePinnedFromElements();
+      //this.moveToTabBoxWrapper();
+    } else {
+      this._setPinnedToElements();
+      //this.moveToTabBox();
+    }
+    this.update();  
+  }
+
+  get sidebarElement() {
+    if (!this._sidebarElement) {
+      this._sidebarElement = document.getElementById('zen-sidebar-panels-sites');
+    }
+    return this._sidebarElement;
+  }
+
+  get splitterElement() {
+    if (!this._splitterElement) {
+      this._splitterElement = document.getElementById('zen-sidebar-web-panel-splitter');
+    }
+    return this._splitterElement;
+  }
+
+  get hSplitterElement() {
+    if (!this._hSplitterElement) {
+      this._hSplitterElement = document.getElementById('zen-sidebar-web-panel-hsplitter');
+    }
+    return this._hSplitterElement;
+  }
+
+  get sidebarHeader() {
+    if (!this._sidebarHeader) {
+      this._sidebarHeader = document.getElementById('zen-sidebar-web-header');
+    }
+    return this._sidebarHeader;
+  }
+
+  get sidebarWrapper() {
+    if (!this._sideBarWrapper) {
+      this._sideBarWrapper = document.getElementById('zen-sidebar-web-panel-wrapper');
+    }
+    return this._sideBarWrapper;
+  }
+
+  get sidebarHeaderButtons() {
+    if (!this._sidebarHeaderButtons) {
+      this._sidebarHeaderButtons = [...this.sidebarHeader.querySelectorAll('.toolbarbutton-1')];
+    }
+    return this._sidebarHeaderButtons;
+  }
+
+  // Context menu
+
+  updateContextMenu(aPopupMenu) {
+    let panel =
+      aPopupMenu.triggerNode && (aPopupMenu.triggerNode || aPopupMenu.triggerNode.closest('toolbarbutton[zen-sidebar-id]'));
+    if (!panel) {
+      return;
+    }
+    let id = panel.getAttribute('zen-sidebar-id');
+    this.contextTab = id;
+    let data = this._getWebPanelData(id);
+    let browser = this._getBrowserById(id);
+    let isMuted = browser && browser.audioMuted;
+    let mutedContextItem = document.getElementById('context_zenToggleMuteWebPanel');
+    document.l10n.setAttributes(
+      mutedContextItem,
+      !isMuted ? 'zen-web-side-panel-context-mute-panel' : 'zen-web-side-panel-context-unmute-panel'
+    );
+    if (!isMuted) {
+      mutedContextItem.setAttribute('muted', 'true');
+    } else {
+      mutedContextItem.removeAttribute('muted');
+    }
+    document.l10n.setAttributes(
+      document.getElementById('context_zenToogleUAWebPanel'),
+      data.ua ? 'zen-web-side-panel-context-disable-ua' : 'zen-web-side-panel-context-enable-ua'
+    );
+    if (!browser) {
+      document.getElementById('context_zenUnloadWebPanel').setAttribute('disabled', 'true');
+    } else {
+      document.getElementById('context_zenUnloadWebPanel').removeAttribute('disabled');
+    }
+  }
+
+  createContainerTabMenu(event) {
+    let window = event.target.ownerGlobal;
+    let data = this.sidebarData;
+    let panelData = data.data[this.contextTab];
+    return window.createUserContextMenu(event, {
+      isContextMenu: true,
+      excludeUserContextId: panelData.userContextId,
+      showDefaultTab: true,
+    });
+  }
+
+  contextChangeContainerTab(event) {
+    let data = this.sidebarData;
+    let userContextId = parseInt(event.target.getAttribute('data-usercontextid'));
+    data.data[this.contextTab].userContextId = userContextId;
+    Services.prefs.setStringPref('zen.sidebar.data', JSON.stringify(data));
+    let browser = this._getBrowserById(this.contextTab);
+    if (browser) {
+      browser.remove();
+      // We need to re-apply a new browser so it takes the new userContextId
+      this._updateWebPanel();
+    }
+  }
+
+  contextOpenNewTab() {
+    let browser = this._getBrowserById(this.contextTab);
+    let data = this.sidebarData;
+    let panel = data.data[this.contextTab];
+    let url = browser == null ? panel.url : browser.currentURI.spec;
+    gZenUIManager.openAndChangeToTab(url);
+    this.close();
+  }
+
+  contextToggleMuteAudio() {
+    let browser = this._getBrowserById(this.contextTab);
+    if (browser.audioMuted) {
+      browser.unmute();
+    } else {
+      browser.mute();
+    }
+  }
+
+  contextToggleUserAgent() {
+    let browser = this._getBrowserById(this.contextTab);
+    browser.browsingContext.customUserAgent = browser.browsingContext.customUserAgent ? null : this.DEFAULT_MOBILE_USER_AGENT;
+    let data = this.sidebarData;
+    data.data[this.contextTab].ua = !data.data[this.contextTab].ua;
+    Services.prefs.setStringPref('zen.sidebar.data', JSON.stringify(data));
+    browser.reload();
+  }
+
+  contextDelete() {
+    let data = this.sidebarData;
+    delete data.data[this.contextTab];
+    data.index = data.index.filter((id) => id !== this.contextTab);
+    let browser = this._getBrowserById(this.contextTab);
+    if (browser) {
+      browser.remove();
+      document.getElementById('zen-sidebar-web-panel-title').textContent = '';
+    }
+    this._currentPanel = null;
+    this._lastOpenedPanel = null;
+    this.update();
+    Services.prefs.setStringPref('zen.sidebar.data', JSON.stringify(data));
+  }
+
+  contextUnload() {
+    let browser = this._getBrowserById(this.contextTab);
+    this.removeTabForBrowser(browser);
+    browser.remove();
+    document.getElementById('zen-sidebar-web-panel-title').textContent = '';
+    this._closeSidebarPanel();
+    this.close();
+    this._lastOpenedPanel = null;
+  }
+
+  insertIntoContextMenu() {
+    const sibling = document.getElementById('context-stripOnShareLink');
+    const menuitem = document.createXULElement('menuitem');
+    menuitem.setAttribute('id', 'context-zenAddToWebPanel');
+    menuitem.setAttribute('hidden', 'true');
+    menuitem.setAttribute('oncommand', 'gZenBrowserManagerSidebar.addPanelFromContextMenu();');
+    menuitem.setAttribute('data-l10n-id', 'zen-web-side-panel-context-add-to-panel');
+    sibling.insertAdjacentElement('afterend', menuitem);
+  }
+
+  addPanelFromContextMenu() {
+    const url = gContextMenu.linkURL || gContextMenu.target.ownerDocument.location.href;
+    this._createNewPanel(url);
+  }
+}
+
+window.gZenBrowserManagerSidebar = new ZenBrowserManagerSidebar();

src/browser/base/zen-components/ZenTabUnloader.mjs

@@ -0,0 +1,283 @@
+{
+  const lazy = {};
+
+  XPCOMUtils.defineLazyPreferenceGetter(lazy, 'zenTabUnloaderEnabled', 'zen.tab-unloader.enabled', false);
+
+  XPCOMUtils.defineLazyPreferenceGetter(lazy, 'zenTabUnloaderTimeout', 'zen.tab-unloader.timeout-minutes', 20);
+
+  XPCOMUtils.defineLazyPreferenceGetter(lazy, 'zenTabUnloaderExcludedUrls', 'zen.tab-unloader.excluded-urls', '');
+
+  const ZEN_TAB_UNLOADER_DEFAULT_EXCLUDED_URLS = [
+    '^about:',
+    '^chrome:',
+    '^devtools:',
+    '^file:',
+    '^resource:',
+    '^view-source:',
+    '^view-image:',
+  ];
+
+  class ZenTabsObserver {
+    static ALL_EVENTS = [
+      'TabAttrModified',
+      'TabPinned',
+      'TabUnpinned',
+      'TabBrowserInserted',
+      'TabBrowserDiscarded',
+      'TabShow',
+      'TabHide',
+      'TabOpen',
+      'TabClose',
+      'TabSelect',
+      'TabMultiSelect',
+    ];
+
+    #listeners = [];
+
+    constructor() {
+      this.#listenAllEvents();
+    }
+
+    #listenAllEvents() {
+      const eventListener = this.#eventListener.bind(this);
+      for (const event of ZenTabsObserver.ALL_EVENTS) {
+        window.addEventListener(event, eventListener);
+      }
+      window.addEventListener('unload', () => {
+        for (const event of ZenTabsObserver.ALL_EVENTS) {
+          window.removeEventListener(event, eventListener);
+        }
+      });
+    }
+
+    #eventListener(event) {
+      for (const listener of this.#listeners) {
+        listener(event.type, event);
+      }
+    }
+
+    addTabsListener(listener) {
+      this.#listeners.push(listener);
+    }
+  }
+
+  class ZenTabsIntervalUnloader {
+    static INTERVAL = 1000 * 60; // 1 minute
+
+    interval = null;
+    unloader = null;
+
+    #excludedUrls = [];
+    #compiledExcludedUrls = [];
+
+    constructor(unloader) {
+      this.unloader = unloader;
+      this.interval = setInterval(this.intervalListener.bind(this), ZenTabsIntervalUnloader.INTERVAL);
+      this.#excludedUrls = this.lazyExcludeUrls;
+    }
+
+    get lazyExcludeUrls() {
+      return [
+        ...ZEN_TAB_UNLOADER_DEFAULT_EXCLUDED_URLS,
+        ...lazy.zenTabUnloaderExcludedUrls.split(',').map((url) => url.trim()),
+      ];
+    }
+
+    arraysEqual(a, b) {
+      if (a === b) return true;
+      if (a == null || b == null) return false;
+      if (a.length !== b.length) return false;
+
+      // If you don't care about the order of the elements inside
+      // the array, you should sort both arrays here.
+      // Please note that calling sort on an array will modify that array.
+      // you might want to clone your array first.
+
+      for (var i = 0; i < a.length; ++i) {
+        if (a[i] !== b[i]) return false;
+      }
+      return true;
+    }
+
+    get excludedUrls() {
+      // Check if excludedrls is the same as the pref value
+      const excludedUrls = this.lazyExcludeUrls;
+      if (!this.arraysEqual(this.#excludedUrls, excludedUrls) || !this.#compiledExcludedUrls.length) {
+        this.#excludedUrls = excludedUrls;
+        this.#compiledExcludedUrls = excludedUrls.map((url) => new RegExp(url));
+      }
+      return this.#compiledExcludedUrls;
+    }
+
+    intervalListener() {
+      if (!lazy.zenTabUnloaderEnabled) {
+        return;
+      }
+      const currentTimestamp = Date.now();
+      const excludedUrls = this.excludedUrls;
+      const tabs = gBrowser.tabs;
+      for (let i = 0; i < tabs.length; i++) {
+        const tab = tabs[i];
+        if (this.unloader.canUnloadTab(tab, currentTimestamp, excludedUrls)) {
+          this.unloader.unload(tab);
+        }
+      }
+    }
+  }
+
+  class ZenTabUnloader extends ZenDOMOperatedFeature {
+    static ACTIVITY_MODIFIERS = ['muted', 'soundplaying', 'label', 'attention'];
+
+    init() {
+      if (!lazy.zenTabUnloaderEnabled) {
+        return;
+      }
+      this.insertIntoContextMenu();
+      this.observer = new ZenTabsObserver();
+      this.intervalUnloader = new ZenTabsIntervalUnloader(this);
+      this.observer.addTabsListener(this.onTabEvent.bind(this));
+    }
+
+    onTabEvent(action, event) {
+      const tab = event.target;
+      switch (action) {
+        case 'TabPinned':
+        case 'TabUnpinned':
+        case 'TabBrowserInserted':
+        case 'TabBrowserDiscarded':
+        case 'TabShow':
+        case 'TabHide':
+          break;
+        case 'TabAttrModified':
+          this.handleTabAttrModified(tab, event);
+          break;
+        case 'TabOpen':
+          this.handleTabOpen(tab);
+          break;
+        case 'TabClose':
+          this.handleTabClose(tab);
+          break;
+        case 'TabSelect':
+        case 'TabMultiSelect':
+          this.updateTabActivity(tab);
+          break;
+        default:
+          console.warn('ZenTabUnloader: Unhandled tab event', action);
+          break;
+      }
+    }
+
+    onLocationChange(browser) {
+      const tab = browser.ownerGlobal.gBrowser.getTabForBrowser(browser);
+      this.updateTabActivity(tab);
+    }
+
+    handleTabClose(tab) {
+      // Nothing yet
+    }
+
+    handleTabOpen(tab) {
+      this.updateTabActivity(tab);
+    }
+
+    handleTabAttrModified(tab, event) {
+      for (const modifier of ZenTabUnloader.ACTIVITY_MODIFIERS) {
+        if (event.detail.changed.includes(modifier)) {
+          this.updateTabActivity(tab);
+          break;
+        }
+      }
+    }
+
+    updateTabActivity(tab) {
+      const currentTimestamp = Date.now();
+      tab.lastActivity = currentTimestamp;
+    }
+
+    get tabs() {
+      return gBrowser.tabs;
+    }
+
+    insertIntoContextMenu() {
+      const element = window.MozXULElement.parseXULToFragment(`
+        <menuseparator/>
+        <menuitem id="context_zenUnloadTab"
+                  data-lazy-l10n-id="tab-zen-unload"
+                  oncommand="gZenTabUnloader.unloadTab();"/>
+        <menu data-lazy-l10n-id="zen-tabs-unloader-tab-actions" id="context_zenTabActions">
+          <menupopup>
+            <menuitem id="context_zenPreventUnloadTab"
+                      data-lazy-l10n-id="tab-zen-prevent-unload"
+                      oncommand="gZenTabUnloader.preventUnloadTab();"/>
+            <menuitem id="context_zenIgnoreUnloadTab"
+                      data-lazy-l10n-id="tab-zen-ignore-unload"
+                      oncommand="gZenTabUnloader.ignoreUnloadTab();"/>
+          </menupopup>
+        </menu>
+      `);
+      document.getElementById('context_closeDuplicateTabs').parentNode.appendChild(element);
+    }
+
+    unload(tab) {
+      gBrowser.discardBrowser(tab);
+      tab.removeAttribute('linkedpanel');
+    }
+
+    unloadTab() {
+      const tabs = TabContextMenu.contextTab.multiselected ? gBrowser.selectedTabs : [TabContextMenu.contextTab];
+      for (let i = 0; i < tabs.length; i++) {
+        if (this.canUnloadTab(tabs[i], Date.now(), [], true)) {
+          this.unload(tabs[i]);
+        }
+      }
+    }
+
+    preventUnloadTab() {
+      const tabs = TabContextMenu.contextTab.multiselected ? gBrowser.selectedTabs : [TabContextMenu.contextTab];
+      for (let i = 0; i < tabs.length; i++) {
+        const tab = tabs[i];
+        tab.zenIgnoreUnload = true;
+      }
+    }
+
+    ignoreUnloadTab() {
+      const tabs = TabContextMenu.contextTab.multiselected ? gBrowser.selectedTabs : [TabContextMenu.contextTab];
+      for (let i = 0; i < tabs.length; i++) {
+        const tab = tabs[i];
+        tab.zenIgnoreUnload = false;
+      }
+    }
+
+    canUnloadTab(tab, currentTimestamp, excludedUrls, ignoreTimestamp = false) {
+      if (
+        (tab.pinned && !ignoreTimestamp) ||
+        tab.selected ||
+        tab.multiselected ||
+        tab.hasAttribute('busy') ||
+        tab.hasAttribute('pending') ||
+        !tab.linkedPanel ||
+        tab.splitView ||
+        tab.attention ||
+        tab.linkedBrowser?.zenModeActive ||
+        (tab.pictureinpicture && !ignoreTimestamp) ||
+        (tab.soundPlaying && !ignoreTimestamp) ||
+        (tab.zenIgnoreUnload && !ignoreTimestamp) ||
+        excludedUrls.some((url) => url.test(tab.linkedBrowser.currentURI.spec))
+      ) {
+        return false;
+      }
+      if (ignoreTimestamp) {
+        return true;
+      }
+      const lastActivity = tab.lastActivity;
+      if (!lastActivity) {
+        return false;
+      }
+      const diff = currentTimestamp - lastActivity;
+      // Check if the tab has been inactive for more than the timeout
+      return diff > lazy.zenTabUnloaderTimeout * 60 * 1000;
+    }
+  }
+
+  window.gZenTabUnloader = new ZenTabUnloader();
+}

src/browser/base/zen-components/ZenThemeBuilder.mjs

@@ -0,0 +1,176 @@
+const kZenAccentColorConfigKey = 'zen.theme.accent-color';
+
+var gZenThemeBuilder = {
+  init() {
+    return; // TODO:
+    this._mouseMoveListener = this._handleThumbMouseMove.bind(this);
+    setTimeout(() => {
+      this._initBuilderUI();
+    }, 500);
+  },
+
+  get _builderWrapper() {
+    if (this.__builderWrapper) {
+      return this.__builderWrapper;
+    }
+    this.__builderWrapper = document.getElementById('zen-theme-builder-wrapper');
+    return this.__builderWrapper;
+  },
+
+  _initBuilderUI() {
+    let wrapper = this._builderWrapper;
+    if (!wrapper) {
+      return;
+    }
+
+    console.info('gZenThemeBuilder: init builder UI');
+
+    const kTemplate = `
+      <html:div id="zen-theme-builder">
+        <html:div id="zen-theme-builder-color-picker">
+          <html:canvas id="zen-theme-builder-color-picker-canvas"></html:canvas>
+          <html:div id="zen-theme-builder-color-picker-deck">
+            <html:div id="zen-theme-builder-color-picker-thumb"></html:div>
+          </html:div>
+        </html:div>
+      </html:div>
+    `;
+    wrapper.innerHTML = kTemplate;
+    this._initColorPicker();
+  },
+
+  _getPositionFromColor(ctx, color) {
+    var w = ctx.canvas.width,
+      h = ctx.canvas.height,
+      data = ctx.getImageData(0, 0, w, h), /// get image data
+      buffer = data.data, /// and its pixel buffer
+      len = buffer.length, /// cache length
+      x,
+      y = 0,
+      p,
+      px; /// for iterating
+    /// iterating x/y instead of forward to get position the easy way
+    for (; y < h; y++) {
+      /// common value for all x
+      p = y * 4 * w;
+      for (x = 0; x < w; x++) {
+        /// next pixel (skipping 4 bytes as each pixel is RGBA bytes)
+        px = p + x * 4;
+        /// if red component match check the others
+        if (buffer[px] === color[0]) {
+          if (buffer[px + 1] === color[1] && buffer[px + 2] === color[2]) {
+            return [x, y];
+          }
+        }
+      }
+    }
+    return null;
+  },
+
+  _hexToRgb(hex) {
+    var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
+    return [parseInt(result[1], 16), parseInt(result[2], 16), parseInt(result[3], 16)];
+  },
+
+  _componentToHex(c) {
+    var hex = c.toString(16);
+    return hex.length == 1 ? '0' + hex : hex;
+  },
+
+  _rgbToHex(r, g, b) {
+    return '#' + this._componentToHex(r) + this._componentToHex(g) + this._componentToHex(b);
+  },
+
+  _initColorPicker() {
+    const canvas = document.getElementById('zen-theme-builder-color-picker-canvas');
+    const thumb = document.getElementById('zen-theme-builder-color-picker-thumb');
+
+    // A all the main colors are all blended together towards the center.
+    // But we also add some random gradients to make it look more interesting.
+    // Instead of using a simple gradient, we use a radial gradient.
+    const ctx = canvas.getContext('2d');
+    const size = 180;
+    canvas.width = size;
+    canvas.height = size;
+    const center = size / 2;
+    const radius = size / 2;
+    const gradient = ctx.createConicGradient(0, center, center);
+    gradient.addColorStop(0, '#fff490');
+    gradient.addColorStop(1 / 12, '#f9e380');
+    gradient.addColorStop(2 / 12, '#fecc87');
+    gradient.addColorStop(3 / 12, '#ffa894');
+    gradient.addColorStop(4 / 12, '#f98089');
+    gradient.addColorStop(5 / 12, '#f9b7c5');
+    gradient.addColorStop(6 / 12, '#c193b8');
+    gradient.addColorStop(7 / 12, '#a8b7e0');
+    gradient.addColorStop(8 / 12, '#88d2f9');
+    gradient.addColorStop(9 / 12, '#81e8e5');
+    gradient.addColorStop(10 / 12, '#b7e5a5');
+    gradient.addColorStop(11 / 12, '#eaefac');
+    gradient.addColorStop(1, '#fff490');
+
+    const radialGradient = ctx.createRadialGradient(size / 2, size / 2, 0, size / 2, size / 2, size / 2);
+    radialGradient.addColorStop(0, 'rgba(255,255,255,1)');
+    radialGradient.addColorStop(1, 'rgba(255,255,255,0)');
+
+    ctx.fillStyle = gradient;
+    ctx.fillRect(0, 0, size, size);
+
+    //ctx.fillStyle = radialGradient;
+    //ctx.fillRect(0, 0, size, size);
+
+    // Add the thumb.
+    const accentColor = Services.prefs.getStringPref(kZenAccentColorConfigKey, '#aac7ff');
+    const pos = this._getPositionFromColor(ctx, this._hexToRgb(accentColor));
+
+    let x = pos ? pos[0] : center;
+    let y = pos ? pos[1] : center;
+
+    thumb.style.left = `${x}px`;
+    thumb.style.top = `${y}px`;
+
+    thumb.addEventListener('mousedown', this._handleThumbMouseDown.bind(this));
+    document.addEventListener('mouseup', this._handleThumbMouseUp.bind(this));
+  },
+
+  _handleThumbMouseDown(e) {
+    document.addEventListener('mousemove', this._mouseMoveListener);
+  },
+
+  _handleThumbMouseUp(e) {
+    document.removeEventListener('mousemove', this._mouseMoveListener);
+  },
+
+  _handleThumbMouseMove(e) {
+    const kThumbOffset = 15;
+    const deck = document.getElementById('zen-theme-builder-color-picker-deck');
+
+    const thumb = document.getElementById('zen-theme-builder-color-picker-thumb');
+    const rect = deck.getBoundingClientRect();
+    let x = e.clientX - rect.left;
+    let y = e.clientY - rect.top;
+
+    if (x > rect.width - kThumbOffset) {
+      x = rect.width - kThumbOffset;
+    }
+    if (y > rect.height - kThumbOffset) {
+      y = rect.height - kThumbOffset;
+    }
+    if (x < kThumbOffset) {
+      x = kThumbOffset;
+    }
+    if (y < kThumbOffset) {
+      y = kThumbOffset;
+    }
+
+    thumb.style.left = `${x}px`;
+    thumb.style.top = `${y}px`;
+
+    const canvas = document.getElementById('zen-theme-builder-color-picker-canvas');
+    const ctx = canvas.getContext('2d');
+    const imageData = ctx.getImageData(x, y, 1, 1);
+
+    // Update the accent color.
+    Services.prefs.setStringPref(kZenAccentColorConfigKey, this._rgbToHex(...imageData.data));
+  },
+};

src/browser/base/zen-components/ZenThemesCommon.mjs

@@ -0,0 +1,120 @@
+var ZenThemesCommon = {
+  kZenColors: ['#aac7ff', '#74d7cb', '#a0d490', '#dec663', '#ffb787', '#dec1b1', '#ffb1c0', '#ddbfc3', '#f6b0ea', '#d4bbff'],
+
+  get browsers() {
+    return Services.wm.getEnumerator('navigator:browser');
+  },
+
+  get currentBrowser() {
+    return Services.wm.getMostRecentWindow('navigator:browser');
+  },
+
+  get themesRootPath() {
+    return PathUtils.join(PathUtils.profileDir, 'chrome', 'zen-themes');
+  },
+
+  get themesDataFile() {
+    return PathUtils.join(PathUtils.profileDir, 'zen-themes.json');
+  },
+
+  getThemeFolder(themeId) {
+    return PathUtils.join(this.themesRootPath, themeId);
+  },
+
+  resetThemesCache() {
+    this.themes = null;
+  },
+
+  async getThemes() {
+    if (!this.themes) {
+      if (!(await IOUtils.exists(this.themesDataFile))) {
+        await IOUtils.writeJSON(this.themesDataFile, {});
+      }
+
+      try {
+        this.themes = await IOUtils.readJSON(this.themesDataFile);
+      } catch (e) {
+        // If we have a corrupted file, reset it
+        await IOUtils.writeJSON(this.themesDataFile, {});
+        this.themes = {};
+        gNotificationBox.appendNotification(
+          "zen-themes-corrupted",
+          {
+            label: { "l10n-id": "zen-themes-corrupted" },
+            image: "chrome://browser/skin/notification-icons/persistent-storage-blocked.svg",
+            priority: gNotificationBox.PRIORITY_INFO_MEDIUM,
+          },
+          []
+        );
+      }
+    }
+
+    return this.themes;
+  },
+
+  async getThemePreferences(theme) {
+    const themePath = PathUtils.join(this.themesRootPath, theme.id, 'preferences.json');
+    if (!(await IOUtils.exists(themePath)) || !theme.preferences) {
+      return [];
+    }
+
+    const preferences = await IOUtils.readJSON(themePath);
+
+    // compat mode for old preferences, all of them can only be checkboxes
+    if (typeof preferences === 'object' && !Array.isArray(preferences)) {
+      console.warn(
+        `[ZenThemes]: Warning, ${theme.name} uses legacy preferences, please migrate them to the new preferences style, as legacy preferences might be removed at a future release. More information at: https://docs.zen-browser.app/themes-store/themes-marketplace-preferences`
+      );
+      const newThemePreferences = [];
+
+      for (let [entry, label] of Object.entries(preferences)) {
+        const [_, negation = '', os = '', property] = /(!?)(?:(macos|windows|linux):)?([A-z0-9-_.]+)/g.exec(entry);
+        const isNegation = negation === '!';
+
+        if (
+          (isNegation && os === gZenOperatingSystemCommonUtils.currentOperatingSystem) ||
+          (os !== '' && os !== gZenOperatingSystemCommonUtils.currentOperatingSystem && !isNegation)
+        ) {
+          continue;
+        }
+
+        newThemePreferences.push({
+          property,
+          label,
+          type: 'checkbox',
+          disabledOn: os !== '' ? [os] : [],
+        });
+      }
+
+      return newThemePreferences;
+    }
+
+    return preferences.filter(
+      ({ disabledOn = [] }) => !disabledOn.includes(gZenOperatingSystemCommonUtils.currentOperatingSystem)
+    );
+  },
+
+  throttle(mainFunction, delay) {
+    let timerFlag = null;
+
+    return (...args) => {
+      if (timerFlag === null) {
+        mainFunction(...args);
+        timerFlag = setTimeout(() => {
+          timerFlag = null;
+        }, delay);
+      }
+    };
+  },
+
+  debounce(mainFunction, wait) {
+    let timerFlag;
+
+    return (...args) => {
+      clearTimeout(timerFlag);
+      timerFlag = setTimeout(() => {
+        mainFunction(...args);
+      }, wait);
+    };
+  },
+};

src/browser/base/zen-components/ZenThemesImporter.mjs

@@ -0,0 +1,320 @@
+const kZenStylesheetThemeHeader = '/* Zen Themes - Generated by ZenThemesImporter.';
+const kZenStylesheetThemeHeaderBody = `* DO NOT EDIT THIS FILE DIRECTLY!
+* Your changes will be overwritten.
+* Instead, go to the preferences and edit the themes there.
+*/
+`;
+const kenStylesheetFooter = `
+/* End of Zen Themes */
+`;
+const getCurrentDateTime = () =>
+  new Intl.DateTimeFormat('en-US', {
+    dateStyle: 'full',
+    timeStyle: 'full',
+  }).format(new Date().getTime());
+
+var gZenStylesheetManager = {
+  async writeStylesheet(path, themes) {
+    let content = kZenStylesheetThemeHeader;
+    content += `\n* FILE GENERATED AT: ${getCurrentDateTime()}\n`;
+    content += kZenStylesheetThemeHeaderBody;
+
+    for (let theme of themes) {
+      if (theme.enabled !== undefined && !theme.enabled) {
+        continue;
+      }
+
+      content += this.getThemeCSS(theme);
+    }
+
+    content += kenStylesheetFooter;
+
+    const buffer = new TextEncoder().encode(content);
+
+    await IOUtils.write(path, buffer);
+  },
+
+  getThemeCSS(theme) {
+    let css = '\n';
+
+    css += `/* Name: ${theme.name} */\n`;
+    css += `/* Description: ${theme.description} */\n`;
+    css += `/* Author: @${theme.author} */\n`;
+
+    if (theme._readmeURL) {
+      css += `/* Readme: ${theme.readme} */\n`;
+    }
+
+    css += `@import url("${theme._chromeURL}");\n`;
+
+    return css;
+  },
+};
+
+var gZenThemesImporter = new (class {
+  constructor() {
+    console.info('[ZenThemesImporter]: Initializing Zen Themes Importer');
+
+    try {
+      window.SessionStore.promiseInitialized.then(async () => {
+        if (Services.prefs.getBoolPref('zen.themes.disable-all', false)) {
+          console.log('[ZenThemesImporter]: Disabling all themes.');
+          return;
+        }
+
+        const themes = await this.getEnabledThemes();
+
+        const themesWithPreferences = await Promise.all(
+          themes.map(async (theme) => {
+            const preferences = await ZenThemesCommon.getThemePreferences(theme);
+
+            return {
+              name: theme.name,
+              enabled: theme.enabled,
+              preferences,
+            };
+          })
+        );
+
+        this.writeToDom(themesWithPreferences);
+
+        await this.insertStylesheet();
+      });
+      console.info('[ZenThemesImporter]: Zen Themes imported');
+    } catch (e) {
+      console.error('[ZenThemesImporter]: Error importing Zen Themes: ', e);
+    }
+
+    Services.prefs.addObserver('zen.themes.updated-value-observer', this.rebuildThemeStylesheet.bind(this), false);
+    Services.prefs.addObserver('zen.themes.disable-all', this.handleDisableThemes.bind(this), false);
+  }
+
+  get sss() {
+    if (!this._sss) {
+      this._sss = Cc['@mozilla.org/content/style-sheet-service;1'].getService(Ci.nsIStyleSheetService);
+    }
+    return this._sss;
+  }
+
+  get styleSheetPath() {
+    return PathUtils.join(PathUtils.profileDir, 'chrome', 'zen-themes.css');
+  }
+
+  async handleDisableThemes() {
+    if (Services.prefs.getBoolPref('zen.themes.disable-all', false)) {
+      console.log('[ZenThemesImporter]: Disabling themes module.');
+
+      await this.removeStylesheet();
+    } else {
+      console.log('[ZenThemesImporter]: Enabling themes module.');
+
+      await this.rebuildThemeStylesheet();
+    }
+  }
+
+  get styleSheetURI() {
+    if (!this._styleSheetURI) {
+      this._styleSheetURI = Services.io.newFileURI(new FileUtils.File(this.styleSheetPath));
+    }
+    return this._styleSheetURI;
+  }
+
+  getStylesheetURIForTheme(theme) {
+    return Services.io.newFileURI(new FileUtils.File(PathUtils.join(ZenThemesCommon.getThemeFolder(theme.id), 'chrome.css')));
+  }
+
+  async insertStylesheet() {
+    if (await IOUtils.exists(this.styleSheetPath)) {
+      await this.sss.loadAndRegisterSheet(this.styleSheetURI, this.sss.AGENT_SHEET);
+    }
+
+    if (this.sss.sheetRegistered(this.styleSheetURI, this.sss.AGENT_SHEET)) {
+      console.debug('[ZenThemesImporter]: Sheet successfully registered');
+    }
+  }
+
+  async removeStylesheet() {
+    await this.sss.unregisterSheet(this.styleSheetURI, this.sss.AGENT_SHEET);
+    await IOUtils.remove(this.styleSheetPath, { ignoreAbsent: true });
+
+    if (!this.sss.sheetRegistered(this.styleSheetURI, this.sss.AGENT_SHEET) && !(await IOUtils.exists(this.styleSheetPath))) {
+      console.debug('[ZenThemesImporter]: Sheet successfully unregistered');
+    }
+  }
+
+  async rebuildThemeStylesheet() {
+    if (Services.focus.activeWindow !== window) {
+      return;
+    }
+
+    ZenThemesCommon.themes = null;
+
+    await this.removeStylesheet();
+
+    const themes = await this.getEnabledThemes();
+
+    await this.writeStylesheet(themes);
+
+    const themesWithPreferences = await Promise.all(
+      themes.map(async (theme) => {
+        const preferences = await ZenThemesCommon.getThemePreferences(theme);
+
+        return {
+          name: theme.name,
+          enabled: theme.enabled,
+          preferences,
+        };
+      })
+    );
+
+    this.setDefaults(themesWithPreferences);
+    this.writeToDom(themesWithPreferences);
+
+    await this.insertStylesheet();
+  }
+
+  async getEnabledThemes() {
+    const themeObject = await ZenThemesCommon.getThemes();
+    const themes = Object.values(themeObject).filter((theme) => theme.enabled === undefined || theme.enabled);
+
+    const themeList = themes.map(({ name }) => name).join(', ');
+
+    const message =
+      themeList !== ''
+        ? `[ZenThemesImporter]: Loading enabled Zen themes: ${themeList}.`
+        : '[ZenThemesImporter]: No enabled Zen themes.';
+
+    console.log(message);
+
+    return themes;
+  }
+
+  setDefaults(themesWithPreferences) {
+    for (const { preferences, enabled } of themesWithPreferences) {
+      if (enabled !== undefined && !enabled) {
+        continue;
+      }
+
+      for (const { type, property, defaultValue } of preferences) {
+        if (defaultValue === undefined) {
+          continue;
+        }
+
+        switch (type) {
+          case 'checkbox': {
+            const value = Services.prefs.getBoolPref(property, false);
+            if (typeof defaultValue !== 'boolean') {
+              console.log(`[ZenThemesImporter]: Warning, invalid data type received for expected type boolean, skipping.`);
+              continue;
+            }
+
+            if (!value) {
+              Services.prefs.setBoolPref(property, defaultValue);
+            }
+            break;
+          }
+
+          default: {
+            const value = Services.prefs.getStringPref(property, 'zen-property-no-saved');
+
+            if (typeof defaultValue !== 'string' && typeof defaultValue !== 'number') {
+              console.log(`[ZenThemesImporter]: Warning, invalid data type received (${typeof defaultValue}), skipping.`);
+              continue;
+            }
+
+            if (value === 'zen-property-no-saved') {
+              Services.prefs.setStringPref(property, defaultValue.toString());
+            }
+          }
+        }
+      }
+    }
+  }
+
+  writeToDom(themesWithPreferences) {
+    for (const browser of ZenMultiWindowFeature.browsers) {
+      for (const { enabled, preferences, name } of themesWithPreferences) {
+        const sanitizedName = `theme-${name?.replaceAll(/\s/g, '-')?.replaceAll(/[^A-z_-]+/g, '')}`;
+
+        if (enabled !== undefined && !enabled) {
+          const element = browser.document.getElementById(sanitizedName);
+
+          if (element) {
+            element.remove();
+          }
+
+          for (const { property } of preferences.filter(({ type }) => type !== 'checkbox')) {
+            const sanitizedProperty = property?.replaceAll(/\./g, '-');
+
+            browser.document.querySelector(':root').style.removeProperty(`--${sanitizedProperty}`);
+          }
+
+          continue;
+        }
+
+        for (const { property, type } of preferences) {
+          const value = Services.prefs.getStringPref(property, '');
+          const sanitizedProperty = property?.replaceAll(/\./g, '-');
+
+          switch (type) {
+            case 'dropdown': {
+              if (value !== '') {
+                let element = browser.document.getElementById(sanitizedName);
+
+                if (!element) {
+                  element = browser.document.createElement('div');
+
+                  element.style.display = 'none';
+                  element.setAttribute('id', sanitizedName);
+
+                  browser.document.body.appendChild(element);
+                }
+
+                element.setAttribute(sanitizedProperty, value);
+              }
+              break;
+            }
+
+            case 'string': {
+              if (value === '') {
+                browser.document.querySelector(':root').style.removeProperty(`--${sanitizedProperty}`);
+              } else {
+                browser.document.querySelector(':root').style.setProperty(`--${sanitizedProperty}`, value);
+              }
+              break;
+            }
+
+            default: {
+            }
+          }
+        }
+      }
+    }
+  }
+
+  async writeStylesheet(themeList = []) {
+    const themes = [];
+    ZenThemesCommon.themes = null;
+
+    for (let theme of themeList) {
+      theme._chromeURL = this.getStylesheetURIForTheme(theme).spec;
+      themes.push(theme);
+    }
+
+    await gZenStylesheetManager.writeStylesheet(this.styleSheetPath, themes);
+  }
+})();
+
+gZenActorsManager.addJSWindowActor("ZenThemeMarketplace", {
+  parent: {
+    esModuleURI: "chrome://browser/content/zen-components/actors/ZenThemeMarketplaceParent.sys.mjs",
+  },
+  child: {
+    esModuleURI: "chrome://browser/content/zen-components/actors/ZenThemeMarketplaceChild.sys.mjs",
+    events: {
+      DOMContentLoaded: {},
+    },
+  },
+  matches: ["https://*.zen-browser.app/*", "about:preferences"],
+  allFrames: true,
+});

src/browser/base/zen-components/ZenWorkspacesStorage.mjs

@@ -0,0 +1,407 @@
+var ZenWorkspacesStorage = {
+  async init() {
+    console.log('ZenWorkspacesStorage: Initializing...');
+    await this._ensureTable();
+  },
+
+  async _ensureTable() {
+    await PlacesUtils.withConnectionWrapper('ZenWorkspacesStorage._ensureTable', async (db) => {
+      // Create the main workspaces table if it doesn't exist
+      await db.execute(`
+        CREATE TABLE IF NOT EXISTS zen_workspaces (
+          id INTEGER PRIMARY KEY,
+          uuid TEXT UNIQUE NOT NULL,
+          name TEXT NOT NULL,
+          icon TEXT,
+          is_default INTEGER NOT NULL DEFAULT 0,
+          container_id INTEGER,
+          position INTEGER NOT NULL DEFAULT 0,
+          created_at INTEGER NOT NULL,
+          updated_at INTEGER NOT NULL
+        )
+      `);
+
+      // Add new columns if they don't exist
+      // SQLite doesn't have a direct "ADD COLUMN IF NOT EXISTS" syntax,
+      // so we need to check if the columns exist first
+      const columns = await db.execute(`PRAGMA table_info(zen_workspaces)`);
+      const columnNames = columns.map(row => row.getResultByName('name'));
+
+      // Helper function to add column if it doesn't exist
+      const addColumnIfNotExists = async (columnName, definition) => {
+        if (!columnNames.includes(columnName)) {
+          await db.execute(`ALTER TABLE zen_workspaces ADD COLUMN ${columnName} ${definition}`);
+        }
+      };
+
+      // Add each new column if it doesn't exist
+      await addColumnIfNotExists('theme_type', 'TEXT');
+      await addColumnIfNotExists('theme_colors', 'TEXT');
+      await addColumnIfNotExists('theme_opacity', 'REAL');
+      await addColumnIfNotExists('theme_rotation', 'INTEGER');
+      await addColumnIfNotExists('theme_texture', 'REAL');
+
+      // Create an index on the uuid column
+      await db.execute(`
+        CREATE INDEX IF NOT EXISTS idx_zen_workspaces_uuid ON zen_workspaces(uuid)
+      `);
+
+      // Create the changes tracking table if it doesn't exist
+      await db.execute(`
+        CREATE TABLE IF NOT EXISTS zen_workspaces_changes (
+          uuid TEXT PRIMARY KEY,
+          timestamp INTEGER NOT NULL
+        )
+      `);
+
+      // Create an index on the uuid column for changes tracking table
+      await db.execute(`
+        CREATE INDEX IF NOT EXISTS idx_zen_workspaces_changes_uuid ON zen_workspaces_changes(uuid)
+      `);
+
+      if (!Weave.Service.engineManager.get('workspaces')) {
+        Weave.Service.engineManager.register(ZenWorkspacesEngine);
+        await ZenWorkspacesStorage.migrateWorkspacesFromJSON();
+      }
+
+      ZenWorkspaces._delayedStartup();
+    });
+  },
+
+  async migrateWorkspacesFromJSON() {
+    const oldWorkspacesPath = PathUtils.join(PathUtils.profileDir, 'zen-workspaces', 'Workspaces.json');
+    if (await IOUtils.exists(oldWorkspacesPath)) {
+      console.info('ZenWorkspacesStorage: Migrating workspaces from JSON...');
+      const oldWorkspaces = await IOUtils.readJSON(oldWorkspacesPath);
+      if (oldWorkspaces.workspaces) {
+        for (const workspace of oldWorkspaces.workspaces) {
+          await this.saveWorkspace(workspace);
+        }
+      }
+      await IOUtils.remove(oldWorkspacesPath);
+    }
+  },
+
+  /**
+   * Private helper method to notify observers with a list of changed UUIDs.
+   * @param {string} event - The observer event name.
+   * @param {Array<string>} uuids - Array of changed workspace UUIDs.
+   */
+  _notifyWorkspacesChanged(event, uuids) {
+    if (uuids.length === 0) return; // No changes to notify
+
+    // Convert the array of UUIDs to a JSON string
+    const data = JSON.stringify(uuids);
+
+    Services.obs.notifyObservers(null, event, data);
+  },
+
+  async saveWorkspace(workspace, notifyObservers = true) {
+    const changedUUIDs = new Set();
+
+    await PlacesUtils.withConnectionWrapper('ZenWorkspacesStorage.saveWorkspace', async (db) => {
+      await db.executeTransaction(async () => {
+        const now = Date.now();
+
+        // Handle default workspace
+        if (workspace.default) {
+          await db.execute(`UPDATE zen_workspaces SET is_default = 0 WHERE uuid != :uuid`, { uuid: workspace.uuid });
+          const unsetDefaultRows = await db.execute(`SELECT uuid FROM zen_workspaces WHERE is_default = 0 AND uuid != :uuid`, { uuid: workspace.uuid });
+          for (const row of unsetDefaultRows) {
+            changedUUIDs.add(row.getResultByName('uuid'));
+          }
+        }
+
+        let newPosition;
+        if ('position' in workspace && Number.isFinite(workspace.position)) {
+          newPosition = workspace.position;
+        } else {
+          // Get the maximum position
+          const maxPositionResult = await db.execute(`SELECT MAX("position") as max_position FROM zen_workspaces`);
+          const maxPosition = maxPositionResult[0].getResultByName('max_position') || 0;
+          newPosition = maxPosition + 1000; // Add a large increment to avoid frequent reordering
+        }
+
+        // Insert or replace the workspace
+        await db.executeCached(`
+          INSERT OR REPLACE INTO zen_workspaces (
+          uuid, name, icon, is_default, container_id, created_at, updated_at, "position",
+          theme_type, theme_colors, theme_opacity, theme_rotation, theme_texture
+        ) VALUES (
+          :uuid, :name, :icon, :is_default, :container_id, 
+          COALESCE((SELECT created_at FROM zen_workspaces WHERE uuid = :uuid), :now),
+          :now,
+          :position,
+          :theme_type, :theme_colors, :theme_opacity, :theme_rotation, :theme_texture
+        )
+        `, {
+          uuid: workspace.uuid,
+          name: workspace.name,
+          icon: workspace.icon || null,
+          is_default: workspace.default ? 1 : 0,
+          container_id: workspace.containerTabId || null,
+          now,
+          position: newPosition,
+          theme_type: workspace.theme?.type || null,
+          theme_colors: workspace.theme ? JSON.stringify(workspace.theme.gradientColors) : null,
+          theme_opacity: workspace.theme?.opacity || null,
+          theme_rotation: workspace.theme?.rotation || null,
+          theme_texture: workspace.theme?.texture || null
+        });
+
+        // Record the change
+        await db.execute(`
+          INSERT OR REPLACE INTO zen_workspaces_changes (uuid, timestamp)
+        VALUES (:uuid, :timestamp)
+        `, {
+          uuid: workspace.uuid,
+          timestamp: Math.floor(now / 1000)
+        });
+
+        changedUUIDs.add(workspace.uuid);
+
+        await this.updateLastChangeTimestamp(db);
+      });
+    });
+
+    if (notifyObservers) {
+      this._notifyWorkspacesChanged("zen-workspace-updated", Array.from(changedUUIDs));
+    }
+  },
+
+  async getWorkspaces() {
+    const db = await PlacesUtils.promiseDBConnection();
+    const rows = await db.executeCached(`
+      SELECT * FROM zen_workspaces ORDER BY created_at ASC
+    `);
+    return rows.map((row) => ({
+      uuid: row.getResultByName('uuid'),
+      name: row.getResultByName('name'),
+      icon: row.getResultByName('icon'),
+      default: !!row.getResultByName('is_default'),
+      containerTabId: row.getResultByName('container_id'),
+      position: row.getResultByName('position'),
+      theme: row.getResultByName('theme_type') ? {
+        type: row.getResultByName('theme_type'),
+        gradientColors: JSON.parse(row.getResultByName('theme_colors')),
+        opacity: row.getResultByName('theme_opacity'),
+        rotation: row.getResultByName('theme_rotation'),
+        texture: row.getResultByName('theme_texture')
+      } : null
+    }));
+  },
+
+  async removeWorkspace(uuid, notifyObservers = true) {
+    const changedUUIDs = [uuid];
+
+    await PlacesUtils.withConnectionWrapper('ZenWorkspacesStorage.removeWorkspace', async (db) => {
+      await db.execute(
+          `
+            DELETE FROM zen_workspaces WHERE uuid = :uuid
+          `,
+          { uuid }
+      );
+
+      // Record the removal as a change
+      const now = Date.now();
+      await db.execute(`
+        INSERT OR REPLACE INTO zen_workspaces_changes (uuid, timestamp)
+        VALUES (:uuid, :timestamp)
+      `, {
+        uuid,
+        timestamp: Math.floor(now / 1000)
+      });
+
+      await this.updateLastChangeTimestamp(db);
+    });
+
+    if (notifyObservers) {
+      this._notifyWorkspacesChanged("zen-workspace-removed", changedUUIDs);
+    }
+  },
+
+  async wipeAllWorkspaces() {
+    await PlacesUtils.withConnectionWrapper('ZenWorkspacesStorage.wipeAllWorkspaces', async (db) => {
+      await db.execute(`DELETE FROM zen_workspaces`);
+      await db.execute(`DELETE FROM zen_workspaces_changes`);
+      await this.updateLastChangeTimestamp(db);
+    });
+  },
+
+  async setDefaultWorkspace(uuid, notifyObservers = true) {
+    const changedUUIDs = [];
+
+    await PlacesUtils.withConnectionWrapper('ZenWorkspacesStorage.setDefaultWorkspace', async (db) => {
+      await db.executeTransaction(async () => {
+        const now = Date.now();
+        // Unset the default flag for all other workspaces
+        await db.execute(`UPDATE zen_workspaces SET is_default = 0 WHERE uuid != :uuid`, { uuid });
+
+        // Collect UUIDs of workspaces that were unset as default
+        const unsetDefaultRows = await db.execute(`SELECT uuid FROM zen_workspaces WHERE is_default = 0 AND uuid != :uuid`, { uuid });
+        for (const row of unsetDefaultRows) {
+          changedUUIDs.push(row.getResultByName('uuid'));
+        }
+
+        // Set the default flag for the specified workspace
+        await db.execute(`UPDATE zen_workspaces SET is_default = 1 WHERE uuid = :uuid`, { uuid });
+
+        // Record the change for the specified workspace
+        await db.execute(`
+          INSERT OR REPLACE INTO zen_workspaces_changes (uuid, timestamp)
+          VALUES (:uuid, :timestamp)
+        `, {
+          uuid,
+          timestamp: Math.floor(now / 1000)
+        });
+
+        // Add the main workspace UUID to the changed set
+        changedUUIDs.push(uuid);
+
+        await this.updateLastChangeTimestamp(db);
+      });
+    });
+
+    if (notifyObservers) {
+      this._notifyWorkspacesChanged("zen-workspace-updated", changedUUIDs);
+    }
+  },
+
+  async markChanged(uuid) {
+    await PlacesUtils.withConnectionWrapper('ZenWorkspacesStorage.markChanged', async (db) => {
+      const now = Date.now();
+      await db.execute(`
+        INSERT OR REPLACE INTO zen_workspaces_changes (uuid, timestamp)
+        VALUES (:uuid, :timestamp)
+      `, {
+        uuid,
+        timestamp: Math.floor(now / 1000)
+      });
+    });
+  },
+
+  async saveWorkspaceTheme(uuid, theme, notifyObservers = true) {
+    const changedUUIDs = [uuid];
+    await PlacesUtils.withConnectionWrapper('saveWorkspaceTheme', async (db) => {
+      await db.execute(`
+        UPDATE zen_workspaces
+        SET
+          theme_type = :type,
+          theme_colors = :colors,
+          theme_opacity = :opacity,
+          theme_rotation = :rotation,
+          theme_texture = :texture,
+          updated_at = :now
+        WHERE uuid = :uuid
+      `, {
+        type: theme.type,
+        colors: JSON.stringify(theme.gradientColors),
+        opacity: theme.opacity,
+        rotation: theme.rotation,
+        texture: theme.texture,
+        now: Date.now(),
+        uuid
+      });
+
+      await this.markChanged(uuid);
+      await this.updateLastChangeTimestamp(db);
+    });
+
+    if (notifyObservers) {
+      this._notifyWorkspacesChanged("zen-workspace-updated", changedUUIDs);
+    }
+  },
+
+  async getChangedIDs() {
+    const db = await PlacesUtils.promiseDBConnection();
+    const rows = await db.execute(`
+      SELECT uuid, timestamp FROM zen_workspaces_changes
+    `);
+    const changes = {};
+    for (const row of rows) {
+      changes[row.getResultByName('uuid')] = row.getResultByName('timestamp');
+    }
+    return changes;
+  },
+
+  async clearChangedIDs() {
+    await PlacesUtils.withConnectionWrapper('ZenWorkspacesStorage.clearChangedIDs', async (db) => {
+      await db.execute(`DELETE FROM zen_workspaces_changes`);
+    });
+  },
+
+  shouldReorderWorkspaces(before, current, after) {
+    const minGap = 1; // Minimum allowed gap between positions
+    return (before !== null && current - before < minGap) || (after !== null && after - current < minGap);
+  },
+
+  async reorderAllWorkspaces(db, changedUUIDs) {
+    const workspaces = await db.execute(`
+      SELECT uuid
+      FROM zen_workspaces
+      ORDER BY "position" ASC
+    `);
+
+    for (let i = 0; i < workspaces.length; i++) {
+      const newPosition = (i + 1) * 1000; // Use large increments
+      await db.execute(`
+        UPDATE zen_workspaces
+        SET "position" = :newPosition
+        WHERE uuid = :uuid
+      `, { newPosition, uuid: workspaces[i].getResultByName('uuid') });
+      changedUUIDs.add(workspaces[i].getResultByName('uuid'));
+    }
+  },
+
+  async updateLastChangeTimestamp(db) {
+    const now = Date.now();
+    await db.execute(`
+      INSERT OR REPLACE INTO moz_meta (key, value)
+    VALUES ('zen_workspaces_last_change', :now)
+    `, { now });
+  },
+
+  async getLastChangeTimestamp() {
+    const db = await PlacesUtils.promiseDBConnection();
+    const result = await db.executeCached(`
+      SELECT value FROM moz_meta WHERE key = 'zen_workspaces_last_change'
+    `);
+    return result.length ? parseInt(result[0].getResultByName('value'), 10) : 0;
+  },
+
+  async updateWorkspacePositions(workspaces) {
+    const changedUUIDs = new Set();
+
+    await PlacesUtils.withConnectionWrapper('ZenWorkspacesStorage.updateWorkspacePositions', async (db) => {
+      await db.executeTransaction(async () => {
+        const now = Date.now();
+
+        for (let i = 0; i < workspaces.length; i++) {
+          const workspace = workspaces[i];
+          const newPosition = (i + 1) * 1000;
+
+          await db.execute(`
+          UPDATE zen_workspaces
+          SET "position" = :newPosition
+          WHERE uuid = :uuid
+        `, { newPosition, uuid: workspace.uuid });
+
+          changedUUIDs.add(workspace.uuid);
+
+          // Record the change
+          await db.execute(`
+          INSERT OR REPLACE INTO zen_workspaces_changes (uuid, timestamp)
+          VALUES (:uuid, :timestamp)
+        `, {
+            uuid: workspace.uuid,
+            timestamp: Math.floor(now / 1000)
+          });
+        }
+
+        await this.updateLastChangeTimestamp(db);
+      });
+    });
+
+    this._notifyWorkspacesChanged("zen-workspace-updated", Array.from(changedUUIDs));
+  },
+};

src/browser/base/zen-components/ZenWorkspacesSync.mjs

@@ -0,0 +1,452 @@
+var { Tracker, Store, SyncEngine } = ChromeUtils.importESModule("resource://services-sync/engines.sys.mjs");
+var { CryptoWrapper } = ChromeUtils.importESModule("resource://services-sync/record.sys.mjs");
+var { Utils } = ChromeUtils.importESModule("resource://services-sync/util.sys.mjs");
+var { SCORE_INCREMENT_XLARGE } = ChromeUtils.importESModule("resource://services-sync/constants.sys.mjs");
+
+
+
+// Define ZenWorkspaceRecord
+function ZenWorkspaceRecord(collection, id) {
+    CryptoWrapper.call(this, collection, id);
+}
+
+ZenWorkspaceRecord.prototype = Object.create(CryptoWrapper.prototype);
+ZenWorkspaceRecord.prototype.constructor = ZenWorkspaceRecord;
+
+ZenWorkspaceRecord.prototype._logName = "Sync.Record.ZenWorkspace";
+
+Utils.deferGetSet(ZenWorkspaceRecord, "cleartext", [
+    "name",
+    "icon",
+    "default",
+    "containerTabId",
+    "position",
+    "theme_type",
+    "theme_colors",
+    "theme_opacity",
+    "theme_rotation",
+    "theme_texture"
+]);
+
+// Define ZenWorkspacesStore
+function ZenWorkspacesStore(name, engine) {
+    Store.call(this, name, engine);
+}
+
+ZenWorkspacesStore.prototype = Object.create(Store.prototype);
+ZenWorkspacesStore.prototype.constructor = ZenWorkspacesStore;
+
+/**
+ * Initializes the store by loading the current changeset.
+ */
+ZenWorkspacesStore.prototype.initialize = async function () {
+    await Store.prototype.initialize.call(this);
+    // Additional initialization if needed
+};
+
+/**
+ * Retrieves all workspace IDs from the storage.
+ * @returns {Object} An object mapping workspace UUIDs to true.
+ */
+ZenWorkspacesStore.prototype.getAllIDs = async function () {
+    try {
+        const workspaces = await ZenWorkspacesStorage.getWorkspaces();
+        const ids = {};
+        for (const workspace of workspaces) {
+            ids[workspace.uuid] = true;
+        }
+        return ids;
+    } catch (error) {
+        this._log.error("Error fetching all workspace IDs", error);
+        throw error;
+    }
+};
+
+/**
+ * Handles changing the ID of a workspace.
+ * @param {String} oldID - The old UUID.
+ * @param {String} newID - The new UUID.
+ */
+ZenWorkspacesStore.prototype.changeItemID = async function (oldID, newID) {
+    try {
+        const workspaces = await ZenWorkspacesStorage.getWorkspaces();
+        const workspace = workspaces.find(ws => ws.uuid === oldID);
+        if (workspace) {
+            workspace.uuid = newID;
+            await ZenWorkspacesStorage.saveWorkspace(workspace,false);
+            // Mark the new ID as changed for sync
+            await ZenWorkspacesStorage.markChanged(newID);
+        }
+    } catch (error) {
+        this._log.error(`Error changing workspace ID from ${oldID} to ${newID}`, error);
+        throw error;
+    }
+};
+
+/**
+ * Checks if a workspace exists.
+ * @param {String} id - The UUID of the workspace.
+ * @returns {Boolean} True if the workspace exists, false otherwise.
+ */
+ZenWorkspacesStore.prototype.itemExists = async function (id) {
+    try {
+        const workspaces = await ZenWorkspacesStorage.getWorkspaces();
+        return workspaces.some(ws => ws.uuid === id);
+    } catch (error) {
+        this._log.error(`Error checking if workspace exists with ID ${id}`, error);
+        throw error;
+    }
+};
+
+/**
+ * Creates a record for a workspace.
+ * @param {String} id - The UUID of the workspace.
+ * @param {String} collection - The collection name.
+ * @returns {ZenWorkspaceRecord} The workspace record.
+ */
+ZenWorkspacesStore.prototype.createRecord = async function (id, collection) {
+    try {
+        const workspaces = await ZenWorkspacesStorage.getWorkspaces();
+        const workspace = workspaces.find(ws => ws.uuid === id);
+        const record = new ZenWorkspaceRecord(collection, id);
+
+        if (workspace) {
+            record.name = workspace.name;
+            record.icon = workspace.icon;
+            record.default = workspace.default;
+            record.containerTabId = workspace.containerTabId;
+            record.position = workspace.position;
+            if (workspace.theme) {
+                record.theme_type = workspace.theme.type;
+                record.theme_colors = JSON.stringify(workspace.theme.gradientColors);
+                record.theme_opacity = workspace.theme.opacity;
+                record.theme_rotation = workspace.theme.rotation;
+                record.theme_texture = workspace.theme.texture;
+            }
+            record.deleted = false;
+        } else {
+            record.deleted = true;
+        }
+
+        return record;
+    } catch (error) {
+        this._log.error(`Error creating record for workspace ID ${id}`, error);
+        throw error;
+    }
+};
+
+/**
+ * Creates a new workspace.
+ * @param {ZenWorkspaceRecord} record - The workspace record to create.
+ */
+ZenWorkspacesStore.prototype.create = async function (record) {
+    try {
+        this._validateRecord(record);
+        const workspace = {
+            uuid: record.id,
+            name: record.name,
+            icon: record.icon,
+            default: record.default,
+            containerTabId: record.containerTabId,
+            position: record.position,
+            theme: record.theme_type ? {
+                type: record.theme_type,
+                gradientColors: JSON.parse(record.theme_colors),
+                opacity: record.theme_opacity,
+                rotation: record.theme_rotation,
+                texture: record.theme_texture
+            } : null
+        };
+        await ZenWorkspacesStorage.saveWorkspace(workspace,false);
+    } catch (error) {
+        this._log.error(`Error creating workspace with ID ${record.id}`, error);
+        throw error;
+    }
+};
+
+/**
+ * Updates an existing workspace.
+ * @param {ZenWorkspaceRecord} record - The workspace record to update.
+ */
+ZenWorkspacesStore.prototype.update = async function (record) {
+    try {
+        this._validateRecord(record);
+        await this.create(record); // Reuse create for update
+    } catch (error) {
+        this._log.error(`Error updating workspace with ID ${record.id}`, error);
+        throw error;
+    }
+};
+
+/**
+ * Removes a workspace.
+ * @param {ZenWorkspaceRecord} record - The workspace record to remove.
+ */
+ZenWorkspacesStore.prototype.remove = async function (record) {
+    try {
+        await ZenWorkspacesStorage.removeWorkspace(record.id, false);
+    } catch (error) {
+        this._log.error(`Error removing workspace with ID ${record.id}`, error);
+        throw error;
+    }
+};
+
+/**
+ * Wipes all workspaces from the storage.
+ */
+ZenWorkspacesStore.prototype.wipe = async function () {
+    try {
+        await ZenWorkspacesStorage.wipeAllWorkspaces();
+    } catch (error) {
+        this._log.error("Error wiping all workspaces", error);
+        throw error;
+    }
+};
+
+/**
+ * Validates a workspace record.
+ * @param {ZenWorkspaceRecord} record - The workspace record to validate.
+ */
+ZenWorkspacesStore.prototype._validateRecord = function (record) {
+    if (!record.id || typeof record.id !== "string") {
+        throw new Error("Invalid workspace ID");
+    }
+    if (!record.name || typeof record.name !== "string") {
+        throw new Error(`Invalid workspace name for ID ${record.id}`);
+    }
+    if (typeof record.default !== "boolean") {
+        record.default = false;
+    }
+    if (record.icon != null && typeof record.icon !== "string") {
+        throw new Error(`Invalid icon for workspace ID ${record.id}`);
+    }
+    if (record.containerTabId != null && typeof record.containerTabId !== "number") {
+        throw new Error(`Invalid containerTabId for workspace ID ${record.id}`);
+    }
+    if(record.position != null && typeof record.position !== "number") {
+        throw new Error(`Invalid position for workspace ID ${record.id}`);
+    }
+
+    // Validate theme properties if they exist
+    if (record.theme_type) {
+        if (typeof record.theme_type !== "string") {
+            throw new Error(`Invalid theme_type for workspace ID ${record.id}`);
+        }
+        if (!record.theme_colors || typeof record.theme_colors !== "string") {
+            throw new Error(`Invalid theme_colors for workspace ID ${record.id}`);
+        }
+        try {
+            JSON.parse(record.theme_colors);
+        } catch (e) {
+            throw new Error(`Invalid theme_colors JSON for workspace ID ${record.id}`);
+        }
+        if (record.theme_opacity != null && typeof record.theme_opacity !== "number") {
+            throw new Error(`Invalid theme_opacity for workspace ID ${record.id}`);
+        }
+        if (record.theme_rotation != null && typeof record.theme_rotation !== "number") {
+            throw new Error(`Invalid theme_rotation for workspace ID ${record.id}`);
+        }
+        if (record.theme_texture != null && typeof record.theme_texture !== "number") {
+            throw new Error(`Invalid theme_texture for workspace ID ${record.id}`);
+        }
+    }
+};
+
+/**
+ * Retrieves changed workspace IDs since the last sync.
+ * @returns {Object} An object mapping workspace UUIDs to their change timestamps.
+ */
+ZenWorkspacesStore.prototype.getChangedIDs = async function () {
+    try {
+        return await ZenWorkspacesStorage.getChangedIDs();
+    } catch (error) {
+        this._log.error("Error retrieving changed IDs from storage", error);
+        throw error;
+    }
+};
+
+/**
+ * Clears all recorded changes after a successful sync.
+ */
+ZenWorkspacesStore.prototype.clearChangedIDs = async function () {
+    try {
+        await ZenWorkspacesStorage.clearChangedIDs();
+    } catch (error) {
+        this._log.error("Error clearing changed IDs in storage", error);
+        throw error;
+    }
+};
+
+/**
+ * Marks a workspace as changed.
+ * @param {String} uuid - The UUID of the workspace that changed.
+ */
+ZenWorkspacesStore.prototype.markChanged = async function (uuid) {
+    try {
+        await ZenWorkspacesStorage.markChanged(uuid);
+    } catch (error) {
+        this._log.error(`Error marking workspace ${uuid} as changed`, error);
+        throw error;
+    }
+};
+
+/**
+ * Finalizes the store by ensuring all pending operations are completed.
+ */
+ZenWorkspacesStore.prototype.finalize = async function () {
+    await Store.prototype.finalize.call(this);
+};
+
+
+// Define ZenWorkspacesTracker
+function ZenWorkspacesTracker(name, engine) {
+    Tracker.call(this, name, engine);
+    this._ignoreAll = false;
+
+    // Observe profile-before-change to stop the tracker gracefully
+    Services.obs.addObserver(this.asyncObserver, "profile-before-change");
+}
+
+ZenWorkspacesTracker.prototype = Object.create(Tracker.prototype);
+ZenWorkspacesTracker.prototype.constructor = ZenWorkspacesTracker;
+
+/**
+ * Retrieves changed workspace IDs by delegating to the store.
+ * @returns {Object} An object mapping workspace UUIDs to their change timestamps.
+ */
+ZenWorkspacesTracker.prototype.getChangedIDs = async function () {
+    try {
+        return await this.engine._store.getChangedIDs();
+    } catch (error) {
+        this._log.error("Error retrieving changed IDs from store", error);
+        throw error;
+    }
+};
+
+/**
+ * Clears all recorded changes after a successful sync.
+ */
+ZenWorkspacesTracker.prototype.clearChangedIDs = async function () {
+    try {
+        await this.engine._store.clearChangedIDs();
+    } catch (error) {
+        this._log.error("Error clearing changed IDs in store", error);
+        throw error;
+    }
+};
+
+/**
+ * Called when the tracker starts. Registers observers to listen for workspace changes.
+ */
+ZenWorkspacesTracker.prototype.onStart = function () {
+    if (this._started) {
+        return;
+    }
+    this._log.trace("Starting tracker");
+    // Register observers for workspace changes
+    Services.obs.addObserver(this.asyncObserver, "zen-workspace-added");
+    Services.obs.addObserver(this.asyncObserver, "zen-workspace-removed");
+    Services.obs.addObserver(this.asyncObserver, "zen-workspace-updated");
+    this._started = true;
+};
+
+/**
+ * Called when the tracker stops. Unregisters observers.
+ */
+ZenWorkspacesTracker.prototype.onStop = function () {
+    if (!this._started) {
+        return;
+    }
+    this._log.trace("Stopping tracker");
+    // Unregister observers for workspace changes
+    Services.obs.removeObserver(this.asyncObserver, "zen-workspace-added");
+    Services.obs.removeObserver(this.asyncObserver, "zen-workspace-removed");
+    Services.obs.removeObserver(this.asyncObserver, "zen-workspace-updated");
+    this._started = false;
+};
+
+/**
+ * Handles observed events and marks workspaces as changed accordingly.
+ * @param {nsISupports} subject - The subject of the notification.
+ * @param {String} topic - The topic of the notification.
+ * @param {String} data - Additional data (JSON stringified array of UUIDs).
+ */
+ZenWorkspacesTracker.prototype.observe = async function (subject, topic, data) {
+    if (this.ignoreAll) {
+        return;
+    }
+
+    try {
+        switch (topic) {
+            case "profile-before-change":
+                await this.stop();
+                break;
+            case "zen-workspace-removed":
+            case "zen-workspace-updated":
+            case "zen-workspace-added":
+                let workspaceIDs;
+                if (data) {
+                    try {
+                        workspaceIDs = JSON.parse(data);
+                        if (!Array.isArray(workspaceIDs)) {
+                            throw new Error("Parsed data is not an array");
+                        }
+                    } catch (parseError) {
+                        this._log.error(`Failed to parse workspace UUIDs from data: ${data}`, parseError);
+                        return;
+                    }
+                } else {
+                    this._log.error(`No data received for event ${topic}`);
+                    return;
+                }
+
+                this._log.trace(`Observed ${topic} for UUIDs: ${workspaceIDs.join(", ")}`);
+
+                // Process each UUID
+                for (const workspaceID of workspaceIDs) {
+                    if (typeof workspaceID === "string") {
+                        // Inform the store about the change
+                        await this.engine._store.markChanged(workspaceID);
+                    } else {
+                        this._log.warn(`Invalid workspace ID encountered: ${workspaceID}`);
+                    }
+                }
+
+                // Bump the score once after processing all changes
+                if (workspaceIDs.length > 0) {
+                    this.score += SCORE_INCREMENT_XLARGE;
+                }
+                break;
+        }
+    } catch (error) {
+        this._log.error(`Error handling ${topic} in observe method`, error);
+    }
+};
+
+/**
+ * Finalizes the tracker by ensuring all pending operations are completed.
+ */
+ZenWorkspacesTracker.prototype.finalize = async function () {
+    await Tracker.prototype.finalize.call(this);
+};
+
+
+// Define ZenWorkspacesEngine
+function ZenWorkspacesEngine(service) {
+    SyncEngine.call(this, "Workspaces", service);
+}
+
+ZenWorkspacesEngine.prototype = Object.create(SyncEngine.prototype);
+ZenWorkspacesEngine.prototype.constructor = ZenWorkspacesEngine;
+
+ZenWorkspacesEngine.prototype._storeObj = ZenWorkspacesStore;
+ZenWorkspacesEngine.prototype._trackerObj = ZenWorkspacesTracker;
+ZenWorkspacesEngine.prototype._recordObj = ZenWorkspaceRecord;
+ZenWorkspacesEngine.prototype.version = 2;
+
+ZenWorkspacesEngine.prototype.syncPriority = 10;
+ZenWorkspacesEngine.prototype.allowSkippedRecord = false;
+
+Object.setPrototypeOf(ZenWorkspacesEngine.prototype, SyncEngine.prototype);
+
+

src/browser/base/zen-components/actors/ZenGlanceChild.sys.mjs

@@ -0,0 +1,124 @@
+export class ZenGlanceChild extends JSWindowActorChild {
+  constructor() {
+    super();
+
+    this.mouseUpListener = this.handleMouseUp.bind(this);
+    this.mouseDownListener = this.handleMouseDown.bind(this);
+    this.clickListener = this.handleClick.bind(this);
+  }
+
+  async handleEvent(event) {
+    switch (event.type) {
+      case 'DOMContentLoaded':
+        await this.initiateGlance();
+        break;
+      default:
+    }
+  }
+
+  async getActivationMethod() {
+    if (this._activationMethod === undefined) {
+      this._activationMethod = await this.sendQuery('ZenGlance:GetActivationMethod');
+    }
+    return this._activationMethod;
+  }
+
+  async getHoverActivationDelay() {
+    if (this._hoverActivationDelay === undefined) {
+      this._hoverActivationDelay = await this.sendQuery('ZenGlance:GetHoverActivationDelay');
+    }
+    return this._hoverActivationDelay;
+  }
+
+  async receiveMessage(message) {
+    switch (message.name) {
+    }
+  }
+
+  async initiateGlance() {
+    this.mouseIsDown = false;
+    const activationMethod = await this.getActivationMethod();
+    if (activationMethod === 'mantain') {
+      this.contentWindow.addEventListener('mousedown', this.mouseDownListener);
+      this.contentWindow.addEventListener('mouseup', this.mouseUpListener);
+
+      this.contentWindow.document.removeEventListener('click', this.clickListener);
+    } else if (activationMethod === 'ctrl' || activationMethod === 'alt' || activationMethod === 'shift') {
+      this.contentWindow.document.addEventListener('click', this.clickListener);
+
+      this.contentWindow.removeEventListener('mousedown', this.mouseDownListener);
+      this.contentWindow.removeEventListener('mouseup', this.mouseUpListener);
+    }
+  }
+
+  ensureOnlyKeyModifiers(event) {
+    return !(event.ctrlKey ^ event.altKey ^ event.shiftKey ^ event.metaKey);
+  }
+
+  openGlance(target) {
+    let url = target.href;
+    // Add domain to relative URLs
+    if (!url.match(/^(?:[a-z]+:)?\/\//i)) {
+      url = this.contentWindow.location.origin + url;
+    }
+    const rect = target.getBoundingClientRect();
+    this.sendAsyncMessage('ZenGlance:OpenGlance', { 
+      url,
+      x: rect.left,
+      y: rect.top,
+      width: rect.width,
+      height: rect.height,
+    });
+  }
+
+  handleMouseUp(event) {
+    if (this.hasClicked) {
+      event.preventDefault();
+      event.stopPropagation();
+      this.hasClicked = false;
+    }
+    this.mouseIsDown = null;
+  }
+
+  async handleMouseDown(event) {
+    const target = event.target.closest('A');
+    console.log('target', target);
+    if (!target) {
+      return;
+    }
+    this.mouseIsDown = target;
+    const hoverActivationDelay = await this.getHoverActivationDelay();
+    this.contentWindow.setTimeout(() => {
+      if (this.mouseIsDown === target) {
+        this.hasClicked = true;
+        this.openGlance(target);
+      }
+    }, hoverActivationDelay);
+  }
+
+  handleClick(event) {
+    if (this.ensureOnlyKeyModifiers(event)) {
+      return;
+    }
+    const activationMethod = this._activationMethod;
+    if (activationMethod === 'ctrl' && !event.ctrlKey) {
+      return;
+    } else if (activationMethod === 'alt' && !event.altKey) {
+      return;
+    } else if (activationMethod === 'shift' && !event.shiftKey) {
+      return;
+    } else if (activationMethod === 'meta' && !event.metaKey) {
+      return;
+    }else if (activationMethod === 'mantain' || typeof activationMethod === 'undefined') {
+      return;
+    }
+    // get closest A element
+    const target = event.target.closest('A');
+    if (target) {
+      event.preventDefault();
+      event.stopPropagation();
+      
+      this.openGlance(target);
+    }
+  }
+}

src/browser/base/zen-components/actors/ZenGlanceParent.sys.mjs

@@ -0,0 +1,24 @@
+export class ZenGlanceParent extends JSWindowActorParent {
+  constructor() {
+    super();
+  }
+
+  async receiveMessage(message) {
+    switch (message.name) {
+      case 'ZenGlance:GetActivationMethod': {
+        return Services.prefs.getStringPref('zen.glance.activation-method', 'ctrl');
+      }
+      case 'ZenGlance:GetHoverActivationDelay': {
+        return Services.prefs.getIntPref('zen.glance.hold-duration', 500);
+      }
+      case 'ZenGlance:OpenGlance': {
+        this.openGlance(this.browsingContext.topChromeWindow, message.data);
+        break;
+      }
+    }
+  }
+
+  openGlance(window, data) {
+    window.gZenGlanceManager.openGlance(data);
+  }
+}

src/browser/base/zen-components/actors/ZenThemeMarketplaceChild.sys.mjs

@@ -0,0 +1,142 @@
+export class ZenThemeMarketplaceChild extends JSWindowActorChild {
+  constructor() {
+    super();
+  }
+
+  handleEvent(event) {
+    switch (event.type) {
+      case 'DOMContentLoaded':
+        this.initiateThemeMarketplace();
+        this.contentWindow.document.addEventListener('ZenCheckForThemeUpdates', this.checkForThemeUpdates.bind(this));
+        break;
+      default:
+    }
+  }
+
+  // This function will be caleld from about:preferences
+  checkForThemeUpdates(event) {
+    event.preventDefault();
+    this.sendAsyncMessage('ZenThemeMarketplace:CheckForUpdates');
+  }
+
+  initiateThemeMarketplace() {
+    this.contentWindow.setTimeout(() => {
+      this.addIntallButtons();
+    }, 0);
+  }
+
+  get actionButton() {
+    return this.contentWindow.document.getElementById('install-theme');
+  }
+
+  get actionButtonUnnstall() {
+    return this.contentWindow.document.getElementById('install-theme-uninstall');
+  }
+
+  async receiveMessage(message) {
+    switch (message.name) {
+      case 'ZenThemeMarketplace:ThemeChanged': {
+        const themeId = message.data.themeId;
+        const actionButton = this.actionButton;
+        const actionButtonInstalled = this.actionButtonUnnstall;
+        if (actionButton && actionButtonInstalled) {
+          actionButton.disabled = false;
+          actionButtonInstalled.disabled = false;
+          if (await this.isThemeInstalled(themeId)) {
+            actionButton.classList.add('hidden');
+            actionButtonInstalled.classList.remove('hidden');
+          } else {
+            actionButton.classList.remove('hidden');
+            actionButtonInstalled.classList.add('hidden');
+          }
+        }
+        break;
+      }
+      case 'ZenThemeMarketplace:CheckForUpdatesFinished': {
+        const updates = message.data.updates;
+        this.contentWindow.document.dispatchEvent(
+          new CustomEvent('ZenThemeMarketplace:CheckForUpdatesFinished', { detail: { updates } })
+        );
+        break;
+      }
+      case 'ZenThemeMarketplace:GetThemeInfo': {
+        const themeId = message.data.themeId;
+        const theme = await this.getThemeInfo(themeId);
+        return theme;
+      }
+    }
+  }
+
+  async addIntallButtons() {
+    const actionButton = this.actionButton;
+    const actionButtonUnnstall = this.actionButtonUnnstall;
+    const errorMessage = this.contentWindow.document.getElementById('install-theme-error');
+    if (!actionButton || !actionButtonUnnstall) {
+      return;
+    }
+
+    errorMessage.classList.add('hidden');
+
+    const themeId = actionButton.getAttribute('zen-theme-id');
+    if (await this.isThemeInstalled(themeId)) {
+      actionButtonUnnstall.classList.remove('hidden');
+    } else {
+      actionButton.classList.remove('hidden');
+    }
+
+    actionButton.addEventListener('click', this.installTheme.bind(this));
+    actionButtonUnnstall.addEventListener('click', this.uninstallTheme.bind(this));
+  }
+
+  async isThemeInstalled(themeId) {
+    return await this.sendQuery('ZenThemeMarketplace:IsThemeInstalled', { themeId });
+  }
+
+  addTheme(theme) {
+    this.sendAsyncMessage('ZenThemeMarketplace:InstallTheme', { theme });
+  }
+
+  getThemeAPIUrl(themeId) {
+    return `https://zen-browser.github.io/theme-store/themes/${themeId}/theme.json`;
+  }
+
+  async getThemeInfo(themeId) {
+    const url = this.getThemeAPIUrl(themeId);
+    console.info('ZTM: Fetching theme info from: ', url);
+    const data = await fetch(url, {
+      mode: 'no-cors',
+    });
+
+    if (data.ok) {
+      try {
+        const obj = await data.json();
+        return obj;
+      } catch (e) {
+        console.error('ZTM: Error parsing theme info: ', e);
+      }
+    } else console.log(data.status);
+    return null;
+  }
+
+  async uninstallTheme(event) {
+    const button = event.target;
+    button.disabled = true;
+    const themeId = button.getAttribute('zen-theme-id');
+    console.info('ZTM: Uninstalling theme with id: ', themeId);
+    this.sendAsyncMessage('ZenThemeMarketplace:UninstallTheme', { themeId });
+  }
+
+  async installTheme(event) {
+    const button = event.target;
+    button.disabled = true;
+    const themeId = button.getAttribute('zen-theme-id');
+    console.info('ZTM: Installing theme with id: ', themeId);
+
+    const theme = await this.getThemeInfo(themeId);
+    if (!theme) {
+      console.error('ZTM: Error fetching theme info');
+      return;
+    }
+    this.addTheme(theme);
+  }
+}

src/browser/base/zen-components/actors/ZenThemeMarketplaceParent.sys.mjs

@@ -0,0 +1,186 @@
+export class ZenThemeMarketplaceParent extends JSWindowActorParent {
+  constructor() {
+    super();
+  }
+
+  async receiveMessage(message) {
+    switch (message.name) {
+      case 'ZenThemeMarketplace:InstallTheme': {
+        console.info('ZenThemeMarketplaceParent: Updating themes');
+        const theme = message.data.theme;
+        theme.enabled = true;
+        const themes = await this.getThemes();
+        themes[theme.id] = theme;
+        this.updateThemes(themes);
+        this.updateChildProcesses(theme.id);
+        break;
+      }
+      case 'ZenThemeMarketplace:UninstallTheme': {
+        console.info('ZenThemeMarketplaceParent: Uninstalling theme');
+        const themeId = message.data.themeId;
+        const themes = await this.getThemes();
+        delete themes[themeId];
+        this.removeTheme(themeId);
+        this.updateThemes(themes);
+        this.updateChildProcesses(themeId);
+        break;
+      }
+      case 'ZenThemeMarketplace:IsThemeInstalled': {
+        const themeId = message.data.themeId;
+        const themes = await this.getThemes();
+        return themes[themeId] ? true : false;
+      }
+      case 'ZenThemeMarketplace:CheckForUpdates': {
+        this.checkForThemeUpdates();
+        break;
+      }
+    }
+  }
+
+  compareversion(version1, version2) {
+    var result = false;
+    if (typeof version1 !== 'object') {
+      version1 = version1.toString().split('.');
+    }
+    if (typeof version2 !== 'object') {
+      version2 = version2.toString().split('.');
+    }
+    for (var i = 0; i < Math.max(version1.length, version2.length); i++) {
+      if (version1[i] == undefined) {
+        version1[i] = 0;
+      }
+      if (version2[i] == undefined) {
+        version2[i] = 0;
+      }
+      if (Number(version1[i]) < Number(version2[i])) {
+        result = true;
+        break;
+      }
+      if (version1[i] != version2[i]) {
+        break;
+      }
+    }
+    return result;
+  }
+
+  async checkForThemeUpdates() {
+    console.info('ZenThemeMarketplaceParent: Checking for theme updates');
+    let updates = [];
+    this._themes = null;
+    for (const theme of Object.values(await this.getThemes())) {
+      const themeInfo = await this.sendQuery('ZenThemeMarketplace:GetThemeInfo', { themeId: theme.id });
+      if (!themeInfo) {
+        continue;
+      }
+      if (!this.compareversion(themeInfo.version, theme.version || '0.0.0') && themeInfo.version != theme.version) {
+        console.info('ZenThemeMarketplaceParent: Theme update found', theme.id, theme.version, themeInfo.version);
+        themeInfo.enabled = theme.enabled;
+        updates.push(themeInfo);
+        await this.removeTheme(theme.id, false);
+        this._themes[themeInfo.id] = themeInfo;
+      }
+    }
+    await this.updateThemes(this._themes);
+    this.sendAsyncMessage('ZenThemeMarketplace:CheckForUpdatesFinished', { updates });
+  }
+
+  async updateChildProcesses(themeId) {
+    this.sendAsyncMessage('ZenThemeMarketplace:ThemeChanged', { themeId });
+  }
+
+  async getThemes() {
+    if (!this._themes) {
+      if (!(await IOUtils.exists(this.themesDataFile))) {
+        await IOUtils.writeJSON(this.themesDataFile, {});
+      }
+      this._themes = await IOUtils.readJSON(this.themesDataFile);
+    }
+    return this._themes;
+  }
+
+  async updateThemes(themes) {
+    this._themes = themes;
+    await IOUtils.writeJSON(this.themesDataFile, themes);
+    await this.checkForThemeChanges();
+  }
+
+  getStyleSheetFullContent(style = '') {
+    let stylesheet = '@-moz-document url-prefix("chrome:") {';
+
+    for (const line of style.split('\n')) {
+      stylesheet += `  ${line}`;
+    }
+
+    stylesheet += '}';
+
+    return stylesheet;
+  }
+
+  async downloadUrlToFile(url, path, isStyleSheet = false) {
+    try {
+      const response = await fetch(url);
+      const data = await response.text();
+      const content = isStyleSheet ? this.getStyleSheetFullContent(data) : data;
+      // convert the data into a Uint8Array
+      let buffer = new TextEncoder().encode(content);
+      await IOUtils.write(path, buffer);
+    } catch (e) {
+      console.error('ZenThemeMarketplaceParent: Error downloading file', url, e);
+    }
+  }
+
+  async downloadThemeFileContents(theme) {
+    const themePath = PathUtils.join(this.themesRootPath, theme.id);
+    await IOUtils.makeDirectory(themePath, { ignoreExisting: true });
+    await this.downloadUrlToFile(theme.style, PathUtils.join(themePath, 'chrome.css'), true);
+    await this.downloadUrlToFile(theme.readme, PathUtils.join(themePath, 'readme.md'));
+    if (theme.preferences) {
+      await this.downloadUrlToFile(theme.preferences, PathUtils.join(themePath, 'preferences.json'));
+    }
+  }
+
+  get themesRootPath() {
+    return PathUtils.join(PathUtils.profileDir, 'chrome', 'zen-themes');
+  }
+
+  get themesDataFile() {
+    return PathUtils.join(PathUtils.profileDir, 'zen-themes.json');
+  }
+
+  triggerThemeUpdate() {
+    const pref = 'zen.themes.updated-value-observer';
+    Services.prefs.setBoolPref(pref, !Services.prefs.getBoolPref(pref));
+  }
+
+  async installTheme(theme) {
+    await this.downloadThemeFileContents(theme);
+  }
+
+  async checkForThemeChanges() {
+    const themes = await this.getThemes();
+    const themeIds = Object.keys(themes);
+    let changed = false;
+    for (const themeId of themeIds) {
+      const theme = themes[themeId];
+      if (!theme) {
+        continue;
+      }
+      const themePath = PathUtils.join(this.themesRootPath, themeId);
+      if (!(await IOUtils.exists(themePath))) {
+        await this.installTheme(theme);
+        changed = true;
+      }
+    }
+    if (changed) {
+      this.triggerThemeUpdate();
+    }
+  }
+
+  async removeTheme(themeId, triggerUpdate = true) {
+    const themePath = PathUtils.join(this.themesRootPath, themeId);
+    await IOUtils.remove(themePath, { recursive: true, ignoreAbsent: true });
+    if (triggerUpdate) {
+      this.triggerThemeUpdate();
+    }
+  }
+}

src/browser/components/controlcenter/content/identityPanel-inc-xhtml.patch

@@ -1,13 +1,13 @@
 diff --git a/browser/components/controlcenter/content/identityPanel.inc.xhtml b/browser/components/controlcenter/content/identityPanel.inc.xhtml
-index 0344fcb566e8e0bedd92b0d45e42aea38de5c329..0d5296700590dd0c8a90929976b8cbc5370e7b47 100644
+index 768768c7d44860e1725f41594da9bcc8c92f4a1d..c04b0d54a41fbf8a22b516524809186d29842b21 100644
 --- a/browser/components/controlcenter/content/identityPanel.inc.xhtml
 +++ b/browser/components/controlcenter/content/identityPanel.inc.xhtml
-@@ -30,7 +30,7 @@
+@@ -28,7 +28,7 @@
        <toolbarseparator/>
        <vbox class="panel-subview-body">
          <toolbarbutton id="identity-popup-security-button"
--                       class="identity-popup-security-connection subviewbutton subviewbutton-iconic"
-+                       class="identity-popup-security-connection subviewbutton"
-                        oncommand="gIdentityHandler.showSecuritySubView();">
+-                       class="identity-popup-security-connection subviewbutton subviewbutton-iconic">
++                       class="identity-popup-security-connection subviewbutton">
            <image class="identity-popup-security-connection-icon toolbarbutton-icon"></image>
            <hbox class="toolbarbutton-text" flex="1">
+             <label class="identity-popup-connection-not-secure"

src/browser/components/customizableui/CustomizableUI-sys-mjs.patch

@@ -1,5 +1,5 @@
 diff --git a/browser/components/customizableui/CustomizableUI.sys.mjs b/browser/components/customizableui/CustomizableUI.sys.mjs
-index 289c3df7dcd6fa6b35681ce61c1e920b6a2651d7..a31dc07c8b756e09f43cd5f81bad8d4a3c5f7fce 100644
+index 989e69245aeb1185125752db6b9c58e462d554e4..a4825653b48aa5012e58a277c862caaf0e37abab 100644
 --- a/browser/components/customizableui/CustomizableUI.sys.mjs
 +++ b/browser/components/customizableui/CustomizableUI.sys.mjs
 @@ -13,6 +13,7 @@ ChromeUtils.defineESModuleGetters(lazy, {
@@ -19,12 +19,13 @@ index 289c3df7dcd6fa6b35681ce61c1e920b6a2651d7..a31dc07c8b756e09f43cd5f81bad8d4a
  
  const kSpecialWidgetPfx = "customizableui-special-";
  
-@@ -253,13 +254,14 @@ var CustomizableUIInternal = {
+@@ -323,13 +324,14 @@ var CustomizableUIInternal = {
        "spring",
        "urlbar-container",
        "spring",
 -      "save-to-pocket-button",
-       "downloads-button",
+-      "downloads-button",
++//      "downloads-button",
        AppConstants.MOZ_DEV_EDITION ? "developer-button" : null,
 -      "fxa-toolbar-menu-button",
 +      "wrapper-sidebar-button",
@@ -36,7 +37,16 @@ index 289c3df7dcd6fa6b35681ce61c1e920b6a2651d7..a31dc07c8b756e09f43cd5f81bad8d4a
      this.registerArea(
        CustomizableUI.AREA_NAVBAR,
        {
-@@ -288,10 +290,10 @@ var CustomizableUIInternal = {
+@@ -338,7 +340,7 @@ var CustomizableUIInternal = {
+         defaultPlacements: navbarPlacements,
+         verticalTabsDefaultPlacements: [
+           "firefox-view-button",
+-          "new-tab-button",
++//          "new-tab-button",
+           "alltabs-button",
+         ],
+         defaultCollapsed: false,
+@@ -363,10 +365,10 @@ var CustomizableUIInternal = {
        {
          type: CustomizableUI.TYPE_TOOLBAR,
          defaultPlacements: [
@@ -48,9 +58,9 @@ index 289c3df7dcd6fa6b35681ce61c1e920b6a2651d7..a31dc07c8b756e09f43cd5f81bad8d4a
 +//          "new-tab-button",
 +//          "alltabs-button",
          ],
+         verticalTabsDefaultPlacements: [],
          defaultCollapsed: null,
-       },
-@@ -331,6 +333,7 @@ var CustomizableUIInternal = {
+@@ -429,6 +431,7 @@ var CustomizableUIInternal = {
        CustomizableUI.AREA_NAVBAR,
        CustomizableUI.AREA_BOOKMARKS,
        CustomizableUI.AREA_TABSTRIP,
@@ -58,7 +68,7 @@ index 289c3df7dcd6fa6b35681ce61c1e920b6a2651d7..a31dc07c8b756e09f43cd5f81bad8d4a
      ]);
      if (AppConstants.platform != "macosx") {
        toolbars.add(CustomizableUI.AREA_MENUBAR);
-@@ -1033,6 +1036,9 @@ var CustomizableUIInternal = {
+@@ -1144,6 +1147,9 @@ var CustomizableUIInternal = {
          placements = gPlacements.get(area);
        }
  
@@ -68,7 +78,7 @@ index 289c3df7dcd6fa6b35681ce61c1e920b6a2651d7..a31dc07c8b756e09f43cd5f81bad8d4a
        // For toolbars that need it, mark as dirty.
        let defaultPlacements = areaProperties.get("defaultPlacements");
        if (
-@@ -3289,6 +3295,9 @@ var CustomizableUIInternal = {
+@@ -3521,6 +3527,9 @@ var CustomizableUIInternal = {
          gSeenWidgets.add(widgetId);
        }
      }

src/browser/components/places/content/browserPlacesViews-js.patch

@@ -0,0 +1,30 @@
+diff --git a/browser/components/places/content/browserPlacesViews.js b/browser/components/places/content/browserPlacesViews.js
+index 1bfa0af16178c9b42172bc1b1e0249d28ff8e9e6..e7e76a6d548b32887c1d39053e42c5e3dafbb839 100644
+--- a/browser/components/places/content/browserPlacesViews.js
++++ b/browser/components/places/content/browserPlacesViews.js
+@@ -393,6 +393,7 @@ class PlacesViewBase {
+           "scheme",
+           PlacesUIUtils.guessUrlSchemeForUI(aPlacesNode.uri)
+         );
++        element.addEventListener("command", gZenGlanceManager.openGlanceForBookmark.bind(gZenGlanceManager));
+       } else if (PlacesUtils.containerTypes.includes(type)) {
+         element = document.createXULElement("menu");
+         element.setAttribute("container", "true");
+@@ -1087,6 +1088,8 @@ class PlacesToolbar extends PlacesViewBase {
+           "scheme",
+           PlacesUIUtils.guessUrlSchemeForUI(aChild.uri)
+         );
++        button.hidden = ZenWorkspaces.isBookmarkInAnotherWorkspace(aChild);
++        button.addEventListener("command", gZenGlanceManager.openGlanceForBookmark.bind(gZenGlanceManager));
+       }
+     }
+ 
+@@ -2235,7 +2238,7 @@ this.PlacesPanelview = class PlacesPanelview extends PlacesViewBase {
+         PlacesUIUtils.guessUrlSchemeForUI(placesNode.uri)
+       );
+       element.setAttribute("label", PlacesUIUtils.getBestTitle(placesNode));
+-
++      element.addEventListener("command", gZenGlanceManager.openGlanceForBookmark.bind(gZenGlanceManager));
+       let icon = placesNode.icon;
+       if (icon) {
+         element.setAttribute("image", icon);

src/browser/components/preferences/zen-settings.js

@@ -645,6 +645,7 @@ var gZenLooksAndFeel = {
         colorElemParen.setAttribute('selected', 'true');
       }
       colorElemParen.addEventListener('click', () => {
+        Services.prefs.setBoolPref('zen.theme.color-prefs.use-workspace-colors', false);
         Services.prefs.setStringPref('zen.theme.accent-color', color);
       });
       colorElemParen.appendChild(colorElem);
@@ -674,9 +675,13 @@ var gZenWorkspacesSettings = {
     };
     Services.prefs.addObserver('zen.workspaces.enabled', this);
     Services.prefs.addObserver('zen.tab-unloader.enabled', tabsUnloaderPrefListener);
+    Services.prefs.addObserver('zen.glance.enabled', tabsUnloaderPrefListener); // We can use the same listener for both prefs
+    Services.prefs.addObserver('zen.glance.activation-method', tabsUnloaderPrefListener);
     window.addEventListener('unload', () => {
       Services.prefs.removeObserver('zen.workspaces.enabled', this);
       Services.prefs.removeObserver('zen.tab-unloader.enabled', tabsUnloaderPrefListener);
+      Services.prefs.removeObserver('zen.glance.enabled', tabsUnloaderPrefListener);
+      Services.prefs.removeObserver('zen.glance.activation-method', tabsUnloaderPrefListener);
     });
   },
 
@@ -965,11 +970,6 @@ var gZenCKSSettings = {
 };
 
 Preferences.addAll([
-  {
-    id: 'zen.theme.toolbar-themed',
-    type: 'bool',
-    default: true,
-  },
   {
     id: 'zen.sidebar.enabled',
     type: 'bool',
@@ -1074,5 +1074,50 @@ Preferences.addAll([
     id: 'zen.tabs.show-newtab-under',
     type: 'bool',
     default: false,
-  }
+  },
+  {
+    id: "zen.glance.activation-method",
+    type: "string",
+    default: "ctrl", 
+  },
+  {
+    id: "zen.glance.enabled",
+    type: "bool",
+    default: true,
+  },
+  {
+    id: "zen.theme.color-prefs.use-workspace-colors",
+    type: "bool",
+    default: false,
+  },
+  {
+    id: "zen.view.compact.color-toolbar",
+    type: "bool",
+    default: true,
+  },
+  {
+    id: "zen.view.compact.color-sidebar",
+    type: "bool",
+    default: true,
+  },
+  {
+    id: "zen.essentials.enabled",
+    type: "bool",
+    default: true,
+  },
+  {
+    id: "zen.tabs.show-newtab-vertical",
+    type: "bool",
+    default: true,
+  },
+  {
+    id: "zen.view.show-newtab-button-border-top",
+    type: "bool",
+    default: false,
+  },
+  {
+    id: "zen.view.show-newtab-button-top",
+    type: "bool",
+    default: true,
+  },
 ]);

src/browser/components/preferences/zenLooksAndFeel.inc.xhtml

@@ -18,9 +18,9 @@
       <html:div id="zen-theme-builder-wrapper"></html:div>
 
       <box class="indent">
-            <checkbox id="zenLooksAndFeelUseThemedToolbar"
-            data-l10n-id="zen-look-and-feel-themed-toolbar"
-            preference="zen.theme.toolbar-themed"/>
+            <checkbox id="zenLooksAndFeelUseWorkspaceColors"
+                  data-l10n-id="zen-look-and-feel-use-workspace-colors"
+                  preference="zen.theme.color-prefs.use-workspace-colors"/>
       </box>
 
       <hbox id="zenLooksAndFeelGradientPickerParent"></hbox>
@@ -236,6 +236,12 @@
             <checkbox id="zenLooksAndFeelEnableToolbarFlashPopup"
                       data-l10n-id="zen-look-and-feel-compact-toolbar-flash-popup"
                       preference="zen.view.compact.toolbar-flash-popup"/>
+            <checkbox id="zenLooksAndFeelEnableThemedToolbarCompactMode"
+                      data-l10n-id="zen-look-and-feel-compact-toolbar-themed"
+                      preference="zen.view.compact.color-toolbar"/>
+            <checkbox id="zenLooksAndFeelEnableThemedSidebarCompactMode"
+                      data-l10n-id="zen-look-and-feel-compact-sidebar-themed"
+                      preference="zen.view.compact.color-sidebar"/>
       </vbox>
 </groupbox>
 
@@ -260,6 +266,36 @@
       </hbox>
 </groupbox>
 
+<hbox id="zenGlanceCategory"
+      class="subcategory"
+      hidden="true"
+      data-category="paneZenLooks">
+<html:h1 data-l10n-id="zen-glance-title"/>
+</hbox>
+
+<groupbox id="zenGlanceGroup" data-category="paneZenLooks" hidden="true" class="highlighting-group">
+      <label><html:h2 data-l10n-id="zen-glance-header"/></label>
+      <description class="description-deemphasized" data-l10n-id="zen-glance-description" />
+
+      <checkbox id="zenLooksAndFeelGlanceEnabled"
+            data-l10n-id="zen-glance-enabled"
+            preference="zen.glance.enabled"/>
+      <hbox align="center">
+            <label id="zenGlanceTriggerLabel" data-l10n-id="zen-glance-trigger-label"/>
+            <menulist id="zenGlanceTrigger" preference="zen.glance.activation-method">
+                  <menupopup>
+                        <menuitem data-l10n-id="zen-glance-trigger-ctrl-click" value="ctrl"/>
+                        <menuitem data-l10n-id="zen-glance-trigger-alt-click" value="alt"/>
+                        <menuitem data-l10n-id="zen-glance-trigger-shift-click" value="shift"/>
+#ifdef XP_MACOSX
+                        <menuitem data-l10n-id="zen-glance-trigger-meta-click" value="meta"/>
+#endif
+                        <menuitem data-l10n-id="zen-glance-trigger-mantain-click" value="mantain" disabled="true"/>
+                  </menupopup>
+            </menulist>
+        </hbox>
+</groupbox>
+
 <hbox id="zenSplitViewCategory"
       class="subcategory"
       hidden="true"
@@ -288,13 +324,19 @@
       <description class="description-deemphasized" data-l10n-id="zen-vertical-tabs-description" />
 
       <checkbox id="zenLooksAndFeelNewtabUnderLastTab"
-            data-l10n-id="zen-vertical-tabs-newtab-under-last-tab"
-            preference="zen.tabs.show-newtab-under"/>
-    <hbox class="indent">
+            data-l10n-id="zen-vertical-tabs-newtab-on-tab-list"
+            preference="zen.tabs.show-newtab-vertical"/>
+    <vbox class="indent">
+        <checkbox id="zenLooksAndFeelShowTopNewtabBorder"
+                data-l10n-id="zen-vertical-tabs-newtab-top-button-border"
+                preference="zen.view.show-newtab-button-border-top"/>
+        <checkbox id="zenLooksAndFeelMoveNewtabToTop"
+                data-l10n-id="zen-vertical-tabs-newtab-top-button-up"
+                preference="zen.view.show-newtab-button-top"/>
         <checkbox id="zenLooksAndFeelShowBottomBorder"
                 data-l10n-id="zen-vertical-tabs-show-bottom-border"
                 preference="zen.view.show-bottom-border"/>
-    </hbox>
+    </vbox>
     
       <label><html:h2 data-l10n-id="zen-vertical-tabs-expand-tabs-header"/></label>
       <description class="description-deemphasized" data-l10n-id="zen-vertical-tabs-expand-tabs-description" />

src/browser/components/sessionstore/TabState-sys-mjs.patch

@@ -1,12 +1,14 @@
 diff --git a/browser/components/sessionstore/TabState.sys.mjs b/browser/components/sessionstore/TabState.sys.mjs
-index 26f5671c849d9b0a126d79b07bc7d3d7870826ec..21d63856a06cd46424e1c1a3697b2f3d225d5c08 100644
+index 26f5671c849d9b0a126d79b07bc7d3d7870826ec..36b535321f17a4e3dfdfdbb677a4e4b869038154 100644
 --- a/browser/components/sessionstore/TabState.sys.mjs
 +++ b/browser/components/sessionstore/TabState.sys.mjs
-@@ -98,6 +98,11 @@ var TabStateInternal = {
+@@ -98,6 +98,13 @@ var TabStateInternal = {
        tabData.muteReason = tab.muteReason;
      }
  
 +    tabData.zenWorkspace = tab.getAttribute("zen-workspace-id");
++    tabData.zenPinnedId = tab.getAttribute("zen-pin-id");
++    tabData.zenEssential = tab.getAttribute("zen-essential");
 +    tabData.zenDefaultUserContextId = tab.getAttribute("zenDefaultUserContextId");
 +    tabData.zenPinnedEntry = tab.getAttribute("zen-pinned-entry");
 +    tabData.zenPinnedIcon = tab.getAttribute("zen-pinned-icon");

src/browser/components/sidebar/browser-sidebar-js.patch

@@ -1,8 +1,8 @@
 diff --git a/browser/components/sidebar/browser-sidebar.js b/browser/components/sidebar/browser-sidebar.js
-index c68a32794996348d95f3b1ee363be2eec587065e..3a163c75ac10a204754648dfd1332c79895799c7 100644
+index 4a124003976684e014435854aef69ce29da541d2..61ce44751c36eea3e5ae2ddcc62e42c01459629b 100644
 --- a/browser/components/sidebar/browser-sidebar.js
 +++ b/browser/components/sidebar/browser-sidebar.js
-@@ -521,7 +521,7 @@ var SidebarController = {
+@@ -578,7 +578,7 @@ var SidebarController = {
     */
    setPosition() {
      // First reset all ordinals to match DOM ordering.
@@ -11,12 +11,11 @@ index c68a32794996348d95f3b1ee363be2eec587065e..3a163c75ac10a204754648dfd1332c79
      [...browser.children].forEach((node, i) => {
        node.style.order = i + 1;
      });
-@@ -535,9 +535,11 @@ var SidebarController = {
+@@ -592,9 +592,10 @@ var SidebarController = {
        let boxOrdinal = this._box.style.order;
-       this._box.style.order = appcontent.style.order;
+       this._box.style.order = tabbox.style.order;
  
--      appcontent.style.order = boxOrdinal;
-+      // appcontent.style.order = boxOrdinal;
+-      tabbox.style.order = boxOrdinal;
        // the launcher should be on the right of the sidebar-box
 -      sidebarContainer.style.order = parseInt(this._box.style.order) + 1;
 +      this._box.style.order = browser.children.length + 2;
@@ -25,7 +24,7 @@ index c68a32794996348d95f3b1ee363be2eec587065e..3a163c75ac10a204754648dfd1332c79
        // Indicate we've switched ordering to the box
        this._box.setAttribute("positionend", true);
        sidebarMain.setAttribute("positionend", true);
-@@ -546,6 +548,9 @@ var SidebarController = {
+@@ -603,6 +604,9 @@ var SidebarController = {
        this._box.removeAttribute("positionend");
        sidebarMain.removeAttribute("positionend");
        sidebarContainer.removeAttribute("positionend");

src/browser/components/tabbrowser/content/tab-hover-preview-mjs.patch

@@ -1,13 +0,0 @@
-diff --git a/browser/components/tabbrowser/content/tab-hover-preview.mjs b/browser/components/tabbrowser/content/tab-hover-preview.mjs
-index b07dba3e060dd730e603997b2c374f218a1eb591..412d35a263d1e6a789927206a506c184a5ac0d46 100644
---- a/browser/components/tabbrowser/content/tab-hover-preview.mjs
-+++ b/browser/components/tabbrowser/content/tab-hover-preview.mjs
-@@ -7,7 +7,7 @@ var { XPCOMUtils } = ChromeUtils.importESModule(
- );
- 
- const POPUP_OPTIONS = {
--  position: "bottomleft topleft",
-+  position: "topright topleft",
-   x: 0,
-   y: -2,
- };

src/browser/components/tabbrowser/content/tabbrowser-js.patch

@@ -1,8 +1,8 @@
 diff --git a/browser/components/tabbrowser/content/tabbrowser.js b/browser/components/tabbrowser/content/tabbrowser.js
-index c89ae2cbb978d6218bd56a059c5ca1e371231607..58c05bd5c935f73e154e84f66b39f58e5741caf6 100644
+index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..d2cd8709007b6d36b055ffff45b103a55f8656ee 100644
 --- a/browser/components/tabbrowser/content/tabbrowser.js
 +++ b/browser/components/tabbrowser/content/tabbrowser.js
-@@ -456,11 +456,26 @@
+@@ -462,11 +462,26 @@
        return duplicateTabs;
      },
  
@@ -31,7 +31,34 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..58c05bd5c935f73e154e84f66b39f58e
        }
        return i;
      },
-@@ -1340,6 +1355,7 @@
+@@ -860,7 +875,7 @@
+       if (this.tabContainer.verticalMode) {
+         let wasFocused = document.activeElement == this.selectedTab;
+         let oldPosition = aTab._tPos;
+-        this.verticalPinnedTabsContainer.appendChild(aTab);
++        aTab.hasAttribute("zen-essential") ? document.getElementById("zen-essentials-container").appendChild(aTab) : this.verticalPinnedTabsContainer.appendChild(aTab);
+         this._updateAfterMoveTabTo(aTab, oldPosition, wasFocused);
+       } else {
+         this.moveTabTo(aTab, this._numPinnedTabs);
+@@ -1107,6 +1122,7 @@
+ 
+       let LOCAL_PROTOCOLS = ["chrome:", "about:", "resource:", "data:"];
+ 
++      try {
+       if (
+         aIconURL &&
+         !aLoadingPrincipal &&
+@@ -1117,6 +1133,9 @@
+         );
+         return;
+       }
++      } catch (e) {
++        console.warn(e);
++      }
+ 
+       let browser = this.getBrowserForTab(aTab);
+       browser.mIconURL = aIconURL;
+@@ -1346,6 +1365,7 @@
        if (!this._previewMode) {
          newTab.recordTimeFromUnloadToReload();
          newTab.updateLastAccessed();
@@ -39,7 +66,25 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..58c05bd5c935f73e154e84f66b39f58e
          oldTab.updateLastAccessed();
          // if this is the foreground window, update the last-seen timestamps.
          if (this.ownerGlobal == BrowserWindowTracker.getTopWindow()) {
-@@ -2705,6 +2721,11 @@
+@@ -2431,7 +2451,7 @@
+ 
+       let panel = this.getPanel(browser);
+       let uniqueId = this._generateUniquePanelID();
+-      panel.id = uniqueId;
++      if (!panel.id?.startsWith("zen-")) panel.id = uniqueId;
+       aTab.linkedPanel = uniqueId;
+ 
+       // Inject the <browser> into the DOM if necessary.
+@@ -2491,7 +2511,7 @@
+       // hasSiblings=false on both the existing browser and the new browser.
+       if (this.tabs.length == 2) {
+         this.tabs[0].linkedBrowser.browsingContext.hasSiblings = true;
+-        this.tabs[1].linkedBrowser.browsingContext.hasSiblings = true;
++        if (this.tabs[1].linkedBrowser.browsingContext) this.tabs[1].linkedBrowser.browsingContext.hasSiblings = true;
+       } else {
+         aTab.linkedBrowser.browsingContext.hasSiblings = this.tabs.length > 1;
+       }
+@@ -2711,6 +2731,11 @@
          );
        }
  
@@ -51,7 +96,7 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..58c05bd5c935f73e154e84f66b39f58e
        if (!UserInteraction.running("browser.tabs.opening", window)) {
          UserInteraction.start("browser.tabs.opening", "initting", window);
        }
-@@ -2773,6 +2794,9 @@
+@@ -2780,6 +2805,9 @@
            noInitialLabel,
            skipBackgroundNotify,
          });
@@ -61,7 +106,7 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..58c05bd5c935f73e154e84f66b39f58e
          if (insertTab) {
            // insert the tab into the tab container in the correct position
            this._insertTabAtIndex(t, {
-@@ -3262,6 +3286,14 @@
+@@ -3291,6 +3319,23 @@
          ) {
            tabWasReused = true;
            tab = this.selectedTab;
@@ -69,14 +114,23 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..58c05bd5c935f73e154e84f66b39f58e
 +          if (tabData.zenWorkspace) {
 +            tab.setAttribute("zen-workspace-id", tabData.zenWorkspace);
 +          }
++          if (tabData.zenPinnedId) {
++            tab.setAttribute("zen-pin-id", tabData.zenPinnedId);
++          }
++          if (tabData.zenEssential) {
++            tab.setAttribute("zen-essential", "true");
++          }
 +          if (tabData.zenDefaultUserContextId) {
 +            tab.setAttribute("zenDefaultUserContextId", "true");
 +          }
++          if (tabData.zenPinnedEntry) {
++            tab.setAttribute("zen-pinned-entry", tabData.zenPinnedEntry);
++          }
 +
            if (!tabData.pinned) {
              this.unpinTab(tab);
            } else {
-@@ -3275,6 +3307,9 @@
+@@ -3304,6 +3349,9 @@
              restoreTabsLazily && !select && !tabData.pinned;
  
            let url = "about:blank";
@@ -86,29 +140,37 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..58c05bd5c935f73e154e84f66b39f58e
            if (tabData.entries?.length) {
              let activeIndex = (tabData.index || tabData.entries.length) - 1;
              // Ensure the index is in bounds.
-@@ -3311,6 +3346,12 @@
+@@ -3340,6 +3388,21 @@
              preferredRemoteType,
            });
  
 +          if (tabData.zenWorkspace) {
 +            tab.setAttribute("zen-workspace-id", tabData.zenWorkspace);
 +          }
++          if (tabData.zenPinnedId) {
++            tab.setAttribute("zen-pin-id", tabData.zenPinnedId);
++          }
++          if (tabData.zenEssential) {
++            tab.setAttribute("zen-essential", "true");
++          }
 +          if (tabData.zenDefaultUserContextId) {
 +            tab.setAttribute("zenDefaultUserContextId", "true");
++          }
++          if (tabData.zenPinnedEntry) {
++            tab.setAttribute("zen-pinned-entry", tabData.zenPinnedEntry);
 +          }
            if (select) {
              tabToSelect = tab;
            }
-@@ -3345,7 +3386,7 @@
+@@ -3374,7 +3437,6 @@
              this.tabContainer._invalidateCachedTabs();
            }
          }
 -
-+        gZenPinnedTabManager.updatePinnedTabForSessionRestore(tabData, tab);
          tab.initialize();
        }
  
-@@ -4152,6 +4193,13 @@
+@@ -4148,6 +4210,13 @@
          TelemetryStopwatch.start("FX_TAB_CLOSE_TIME_NO_ANIM_MS", aTab);
        }
  
@@ -122,15 +184,27 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..58c05bd5c935f73e154e84f66b39f58e
        // Handle requests for synchronously removing an already
        // asynchronously closing tab.
        if (!animate && aTab.closing) {
-@@ -4198,6 +4246,7 @@
-         isLastTab ||
-         aTab.pinned ||
-         aTab.hidden ||
-+        true ||
-         this._removingTabs.size >
-           3 /* don't want lots of concurrent animations */ ||
-         !aTab.hasAttribute(
-@@ -5131,10 +5180,10 @@
+@@ -4163,6 +4232,10 @@
+       // state).
+       let tabWidth = window.windowUtils.getBoundsWithoutFlushing(aTab).width;
+ 
++      if (aTab.hasAttribute("zen-glance-tab")) {
++        gZenGlanceManager.closeGlance();
++        return;
++      }
+       if (
+         !this._beginRemoveTab(aTab, {
+           closeWindowFastpath: true,
+@@ -4311,7 +4384,7 @@
+ 
+       var closeWindow = false;
+       var newTab = false;
+-      if (aTab.visible && this.visibleTabs.length == 1) {
++      if (aTab.visible && this.visibleTabs.length == 1 && !aTab._closingGlance) {
+         closeWindow =
+           closeWindowWithLastTab != null
+             ? closeWindowWithLastTab
+@@ -5123,10 +5196,10 @@
        SessionStore.deleteCustomTabValue(aTab, "hiddenBy");
      },
  
@@ -143,7 +217,7 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..58c05bd5c935f73e154e84f66b39f58e
          aTab.selected ||
          aTab.closing ||
          // Tabs that are sharing the screen, microphone or camera cannot be hidden.
-@@ -7050,6 +7099,7 @@
+@@ -7042,6 +7115,7 @@
              aWebProgress.isTopLevel
            ) {
              this.mTab.setAttribute("busy", "true");
@@ -151,7 +225,7 @@ index c89ae2cbb978d6218bd56a059c5ca1e371231607..58c05bd5c935f73e154e84f66b39f58e
              gBrowser._tabAttrModified(this.mTab, ["busy"]);
              this.mTab._notselectedsinceload = !this.mTab.selected;
              gBrowser.syncThrobberAnimations(this.mTab);
-@@ -7870,7 +7920,7 @@ var TabContextMenu = {
+@@ -7874,7 +7948,7 @@ var TabContextMenu = {
      );
      contextUnpinSelectedTabs.hidden =
        !this.contextTab.pinned || !multiselectionContext;

src/browser/components/tabbrowser/content/tabs-js.patch

@@ -1,8 +1,17 @@
 diff --git a/browser/components/tabbrowser/content/tabs.js b/browser/components/tabbrowser/content/tabs.js
-index 137f1a3854f10aca0d0e3233a82c1c18fbdc2823..419e0ad674b76454e6e3e1ed4ae1a85488137940 100644
+index f3a2f226a9056c5a75023281fdeb704cec49b4a6..39c46b141145864fb3b8043d2a9865299561a6cc 100644
 --- a/browser/components/tabbrowser/content/tabs.js
 +++ b/browser/components/tabbrowser/content/tabs.js
-@@ -840,7 +840,7 @@
+@@ -894,7 +894,7 @@
+             let postTransitionCleanup = () => {
+               tab.removeAttribute("tabdrop-samewindow");
+ 
+-              this._finishAnimateTabMove();
++              this._finishAnimateTabMove(true);
+               if (dropIndex !== false) {
+                 gBrowser.moveTabTo(tab, dropIndex);
+                 if (incrementDropIndex) {
+@@ -904,7 +904,7 @@
  
                gBrowser.syncThrobberAnimations(tab);
              };
@@ -11,7 +20,16 @@ index 137f1a3854f10aca0d0e3233a82c1c18fbdc2823..419e0ad674b76454e6e3e1ed4ae1a854
                postTransitionCleanup();
              } else {
                let onTransitionEnd = transitionendEvent => {
-@@ -1411,7 +1411,7 @@
+@@ -1284,7 +1284,7 @@
+         }
+       }
+ 
+-      let allChildren = [...verticalPinnedTabsContainer.children, ...children];
++      let allChildren = [...document.getElementById("zen-essentials-container").children, ...verticalPinnedTabsContainer.children, ...children];
+       this._allTabs = allChildren;
+       return allChildren;
+     }
+@@ -1480,7 +1480,7 @@
            let rect = ele => {
              return window.windowUtils.getBoundsWithoutFlushing(ele);
            };
@@ -20,11 +38,11 @@ index 137f1a3854f10aca0d0e3233a82c1c18fbdc2823..419e0ad674b76454e6e3e1ed4ae1a854
            if (tab && rect(tab).width <= this._tabClipWidth) {
              this.setAttribute("closebuttons", "activetab");
            } else {
-@@ -1430,10 +1430,12 @@
+@@ -1499,10 +1499,12 @@
  
      _handleTabSelect(aInstant) {
        let selectedTab = this.selectedItem;
--      if (this.hasAttribute("overflow")) {
+-      if (this.overflowing) {
 -        this.arrowScrollbox.ensureElementIsVisible(selectedTab, aInstant);
 -      }
 +      this.arrowScrollbox.ensureElementIsVisible(selectedTab, aInstant);
@@ -36,7 +54,7 @@ index 137f1a3854f10aca0d0e3233a82c1c18fbdc2823..419e0ad674b76454e6e3e1ed4ae1a854
        selectedTab._notselectedsinceload = false;
      }
  
-@@ -1477,7 +1479,7 @@
+@@ -1550,7 +1552,7 @@
          if (isEndTab && !this._hasTabTempMaxWidth) {
            return;
          }
@@ -45,7 +63,7 @@ index 137f1a3854f10aca0d0e3233a82c1c18fbdc2823..419e0ad674b76454e6e3e1ed4ae1a854
          // Force tabs to stay the same width, unless we're closing the last tab,
          // which case we need to let them expand just enough so that the overall
          // tabbar width is the same.
-@@ -1492,7 +1494,7 @@
+@@ -1565,7 +1567,7 @@
          let tabsToReset = [];
          for (let i = numPinned; i < tabs.length; i++) {
            let tab = tabs[i];
@@ -54,10 +72,10 @@ index 137f1a3854f10aca0d0e3233a82c1c18fbdc2823..419e0ad674b76454e6e3e1ed4ae1a854
            if (!isEndTab) {
              // keep tabs the same width
              tab.style.transition = "none";
-@@ -1558,9 +1560,9 @@
+@@ -1630,13 +1632,13 @@
+       let verticalTabsContainer = document.getElementById(
          "vertical-pinned-tabs-container"
        );
-       let newTabButton = document.getElementById("newtab-button-container");
 -      let numPinned = gBrowser._numPinnedTabs;
 +      let numPinned = gBrowser._numVisiblePinTabs;
  
@@ -66,25 +84,21 @@ index 137f1a3854f10aca0d0e3233a82c1c18fbdc2823..419e0ad674b76454e6e3e1ed4ae1a854
          let tabs = this._getVisibleTabs();
          for (let i = 0; i < numPinned; i++) {
            tabs[i].style.marginInlineStart = "";
-@@ -1568,7 +1570,7 @@
+-          verticalTabsContainer.appendChild(tabs[i]);
++          tabs[i].hasAttribute("zen-essential") ? document.getElementById("zen-essentials-container").appendChild(tabs[i]) : verticalTabsContainer.appendChild(tabs[i]);
          }
        }
  
--      newTabButton.toggleAttribute("showborder", gBrowser._numPinnedTabs !== 0);
-+      newTabButton.toggleAttribute("showborder", gBrowser._numVisiblePinTabs !== 0);
-       this.style.removeProperty("--tab-overflow-pinned-tabs-width");
-     }
- 
-@@ -1589,7 +1591,7 @@
+@@ -1660,7 +1662,7 @@
  
      _positionPinnedTabs() {
        let tabs = this._getVisibleTabs();
 -      let numPinned = gBrowser._numPinnedTabs;
 +      let numPinned = gBrowser._numVisiblePinTabs;
        let absPositionHorizontalTabs =
-         this.hasAttribute("overflow") &&
-         tabs.length > numPinned &&
-@@ -1672,7 +1674,7 @@
+         this.overflowing && tabs.length > numPinned && numPinned > 0;
+ 
+@@ -1934,7 +1936,7 @@
        }
  
        let pinned = draggedTab.pinned;
@@ -93,7 +107,18 @@ index 137f1a3854f10aca0d0e3233a82c1c18fbdc2823..419e0ad674b76454e6e3e1ed4ae1a854
        let tabs = this._getVisibleTabs().slice(
          pinned ? 0 : numPinned,
          pinned ? numPinned : undefined
-@@ -1949,9 +1951,9 @@
+@@ -2059,8 +2061,8 @@
+       }
+     }
+ 
+-    _finishAnimateTabMove() {
+-      if (!this.hasAttribute("movingtab")) {
++    _finishAnimateTabMove(always = false) {
++      if (!this.hasAttribute("movingtab") && !always) {
+         return;
+       }
+ 
+@@ -2218,9 +2220,9 @@
        function newIndex(aTab, index) {
          // Don't allow mixing pinned and unpinned tabs.
          if (aTab.pinned) {

src/browser/modules/AsyncTabSwitcher-sys-mjs.patch

@@ -1,68 +0,0 @@
-diff --git a/browser/components/tabbrowser/AsyncTabSwitcher.sys.mjs b/browser/components/tabbrowser/AsyncTabSwitcher.sys.mjs
-index 9f4aa535e07adab496788165f4089be6732b1444..7b7955c0d1f2f3277cb750652458649d181e90e5 100644
---- a/browser/components/tabbrowser/AsyncTabSwitcher.sys.mjs
-+++ b/browser/components/tabbrowser/AsyncTabSwitcher.sys.mjs
-@@ -39,6 +39,10 @@ XPCOMUtils.defineLazyPreferenceGetter(
-   300
- );
- 
-+function zenSplitViewIsEnabled() {
-+  return Services.prefs.getBoolPref("zen.splitView.working", false);
-+}
-+
- /**
-  * The tab switcher is responsible for asynchronously switching
-  * tabs in e10s. It waits until the new tab is ready (i.e., the
-@@ -279,7 +283,7 @@ export class AsyncTabSwitcher {
-         browser.docShellIsActive = true;
-       }
- 
--      if (remoteTab) {
-+      if (remoteTab && !zenSplitViewIsEnabled()) {
-         browser.renderLayers = true;
-         remoteTab.priorityHint = true;
-       }
-@@ -291,7 +295,7 @@ export class AsyncTabSwitcher {
-       // Setting the docShell to be inactive will also cause it
-       // to stop rendering layers.
-       browser.docShellIsActive = false;
--      if (remoteTab) {
-+      if (remoteTab && !zenSplitViewIsEnabled()) {
-         remoteTab.priorityHint = false;
-       }
-       if (!browser.hasLayers) {
-@@ -364,7 +368,7 @@ export class AsyncTabSwitcher {
-     // constructing BrowserChild's, layer trees, etc, by showing a blank
-     // tab instead and focusing it immediately.
-     let shouldBeBlank = false;
--    if (requestedBrowser.isRemoteBrowser) {
-+    if (requestedBrowser.isRemoteBrowser && !zenSplitViewIsEnabled()) {
-       // If a tab is remote and the window is not minimized, we can show a
-       // blank tab instead of a spinner in the following cases:
-       //
-@@ -399,7 +403,7 @@ export class AsyncTabSwitcher {
-       }
-     }
- 
--    if (requestedBrowser.isRemoteBrowser) {
-+    if (requestedBrowser.isRemoteBrowser && !zenSplitViewIsEnabled()) {
-       this.addLogFlag("isRemote");
-     }
- 
-@@ -825,7 +829,7 @@ export class AsyncTabSwitcher {
-       `onRemotenessChange(${tab._tPos}, ${tab.linkedBrowser.isRemoteBrowser})`
-     );
-     if (!tab.linkedBrowser.isRemoteBrowser) {
--      if (this.getTabState(tab) == this.STATE_LOADING) {
-+      if (this.getTabState(tab) == this.STATE_LOADING && !zenSplitViewIsEnabled()) {
-         this.onLayersReady(tab.linkedBrowser);
-       } else if (this.getTabState(tab) == this.STATE_UNLOADING) {
-         this.onLayersCleared(tab.linkedBrowser);
-@@ -1018,6 +1022,7 @@ export class AsyncTabSwitcher {
-       lazy.gTabCacheSize > 1 &&
-       tab.linkedBrowser.isRemoteBrowser &&
-       tab.linkedBrowser.currentURI.spec != "about:blank"
-+      && !zenSplitViewIsEnabled()
-     ) {
-       let tabIndex = this.tabLayerCache.indexOf(tab);
- 

src/browser/themes/BuiltInThemeConfig-sys-mjs.patch

@@ -1,21 +1,8 @@
 diff --git a/browser/themes/BuiltInThemeConfig.sys.mjs b/browser/themes/BuiltInThemeConfig.sys.mjs
-index 7cfea4b705a1338b1eb5c4f255808aeac4bdb819..cf7dc720a3bd2b14535d57262ad2297f9478eddc 100644
+index f738f7f1e37d20d9d9158f052572334714475107..f4b0e9a7077076f2fbe8ac17fa6aadf586c6b37c 100644
 --- a/browser/themes/BuiltInThemeConfig.sys.mjs
 +++ b/browser/themes/BuiltInThemeConfig.sys.mjs
-@@ -22,24 +22,17 @@ export const BuiltInThemeConfig = new Map([
-   [
-     "firefox-compact-light@mozilla.org",
-     {
--      version: "1.2",
-+      version: "1.3",
-       path: "resource://builtin-themes/light/",
-     },
-   ],
-   [
-     "firefox-compact-dark@mozilla.org",
-     {
--      version: "1.2",
-+      version: "1.3",
+@@ -33,13 +33,6 @@ export const BuiltInThemeConfig = new Map([
        path: "resource://builtin-themes/dark/",
      },
    ],

src/browser/themes/BuiltInThemes-sys-mjs.patch

@@ -11,15 +11,6 @@ index c2d5dd7a18895ae8b4afbf386f122e7899c48cda..377d904bbf5adc92bf7cb0aa4c4c6417
      );
      let activeBuiltInTheme = this.builtInThemeMap.get(activeThemeID);
  
-@@ -82,7 +82,7 @@ class _BuiltInThemes {
-       lazy.AddonManager.maybeInstallBuiltinAddon(
-         activeThemeID,
-         activeBuiltInTheme.version,
--        `resource://builtin-themes/${activeBuiltInTheme.path}`
-+        `${activeBuiltInTheme.path}`
-       );
-     }
-   }
 @@ -166,7 +166,7 @@ class _BuiltInThemes {
    async _uninstallExpiredThemes() {
      const activeThemeID = Services.prefs.getStringPref(

src/browser/themes/addons/dark/manifest-json.patch

@@ -10,9 +10,8 @@ index bfebde683d00b0acf26509139a0f662029d37c72..976b553f49e40b7ed02743d79ccc102f
 +  "name": "Zen Dark",
    "description": "A theme with a dark color scheme.",
 -  "author": "Mozilla",
--  "version": "1.2",
 +  "author": "Zen",
-+  "version": "1.3",
+   "version": "1.3.2",
  
    "icons": { "32": "icon.svg" },
  

src/browser/themes/addons/light/manifest-json.patch

@@ -10,9 +10,8 @@ index d490f8f08d203ded55b65fe1a19be105b61ee6c0..eb4349e939b979b3a4d7c525ee0c0f9a
 +  "name": "Zen Light",
    "description": "A theme with a light color scheme.",
 -  "author": "Mozilla",
--  "version": "1.2",
 +  "author": "Zen",
-+  "version": "1.3",
+   "version": "1.3",
  
    "icons": { "32": "icon.svg" },
  

src/browser/themes/shared/browser-custom-colors-css.patch

@@ -1,31 +0,0 @@
-diff --git a/browser/themes/shared/browser-custom-colors.css b/browser/themes/shared/browser-custom-colors.css
-index 23187312740d440b3cd4b376a06cb2ab2e885604..ac9aafc0ceed04364ae5b468cf7d2b2843aa7fe5 100644
---- a/browser/themes/shared/browser-custom-colors.css
-+++ b/browser/themes/shared/browser-custom-colors.css
-@@ -6,7 +6,7 @@
- 
- @media not (prefers-contrast) {
-   :root:not([lwtheme]) {
--    --button-primary-bgcolor: light-dark(rgb(0, 97, 224), rgb(0, 221, 255));
-+    --button-primary-bgcolor: light-dark(#000, #fff);
-     --button-primary-hover-bgcolor: light-dark(rgb(2, 80, 187), rgb(128, 235, 255));
-     --button-primary-active-bgcolor: light-dark(rgb(5, 62, 148), rgb(170, 242, 255));
-     --button-primary-color: light-dark(rgb(251, 251, 254), rgb(43, 42, 51));
-@@ -15,7 +15,7 @@
-       rgba(0, 0, 0, .33)
-     );
-     --button-hover-bgcolor: light-dark(
--      rgba(207, 207, 216, .66),
-+      rgba(228, 228, 235, 0.66),
-       rgba(207, 207, 216, .20)
-     );
-     --button-active-bgcolor: light-dark(
-@@ -49,7 +49,7 @@
-     --tab-icon-overlay-fill: light-dark(rgb(91, 91, 102), rgb(251, 251, 254));
-     --tabs-navbar-separator-style: none;
- 
--    --toolbox-non-lwt-bgcolor: light-dark(rgb(240, 240, 244), rgb(28, 27, 34));
-+    --toolbox-non-lwt-bgcolor: light-dark(rgb(210, 210, 213), rgb(28, 27, 34));
-     --toolbox-non-lwt-textcolor: light-dark(rgb(21, 20, 26), rgb(251, 251, 254));
-     --toolbox-non-lwt-bgcolor-inactive: var(--toolbox-non-lwt-bgcolor);
-     --toolbox-non-lwt-textcolor-inactive: var(--toolbox-non-lwt-textcolor);

src/browser/themes/shared/browser-shared-css.patch

@@ -2,14 +2,6 @@ diff --git a/browser/themes/shared/browser-shared.css b/browser/themes/shared/br
 index f2171eb033a1143870f4708c63f565fabb535c4b..4280bc4b0f7cdbd94179fa2111f8001a331ea42b 100644
 --- a/browser/themes/shared/browser-shared.css
 +++ b/browser/themes/shared/browser-shared.css
-@@ -179,7 +179,6 @@ body {
-   appearance: none;
- 
-   /* Toolbar / content area border */
--  border-bottom: 0.01px solid var(--chrome-content-separator-color);
- 
-   background-color: var(--toolbox-non-lwt-bgcolor);
-   color: var(--toolbox-non-lwt-textcolor);
 @@ -188,7 +187,6 @@ body {
    transition: background-color var(--inactive-window-transition);
  

src/browser/themes/shared/tabbrowser/tabs-css.patch

@@ -3,9 +3,9 @@ index 9f7331f2f00a8b0de6ce28a7029358a86eeb8873..2dc56a8455df9009bd1f524b377b8fdf
 --- a/browser/themes/shared/tabbrowser/tabs.css
 +++ b/browser/themes/shared/tabbrowser/tabs.css
 @@ -15,7 +15,7 @@
-   --tab-border-radius: 4px;
-   --tab-shadow-max-size: 6px;
-   --tab-block-margin: 4px;
+   --tab-icon-end-margin: 5.5px;
+   --tab-icon-overlay-fill: light-dark(black, white);
+   --tab-icon-overlay-stroke: light-dark(white, black);
 -  --tab-loading-fill: #0A84FF;
 +  --tab-loading-fill: var(--zen-primary-color);
    --tab-hover-background-color: color-mix(in srgb, currentColor 11%, transparent);
@@ -24,8 +24,8 @@ index 9f7331f2f00a8b0de6ce28a7029358a86eeb8873..2dc56a8455df9009bd1f524b377b8fdf
 @@ -952,7 +951,7 @@ sidebar-main[expanded] > #vertical-tabs > #tabbrowser-tabs[orient="vertical"] >
    toolbarbutton:not(#firefox-view-button),
    toolbarpaletteitem:not(#wrapper-firefox-view-button)
- ) + #tabbrowser-tabs {
--  border-inline-start: 1px solid color-mix(in srgb, currentColor 25%, transparent);
+ ) ~ #tabbrowser-tabs {
+-  border-inline-start: var(--tabstrip-inner-border);
 +  border-inline-start: transparent;
    padding-inline-start: calc(var(--tab-overflow-pinned-tabs-width) + 2px);
    margin-inline-start: 2px;
@@ -35,6 +35,6 @@ index 9f7331f2f00a8b0de6ce28a7029358a86eeb8873..2dc56a8455df9009bd1f524b377b8fdf
  }
  
 -#tabbrowser-tabs[hasadjacentnewtabbutton]:not([overflow]) ~ #new-tab-button,
- #tabbrowser-tabs[orient="vertical"] > #tabbrowser-arrowscrollbox > #tabbrowser-arrowscrollbox-periphery > #tabs-newtab-button,
- #tabbrowser-tabs[overflow] > #tabbrowser-arrowscrollbox > #tabbrowser-arrowscrollbox-periphery > #tabs-newtab-button,
- #tabbrowser-tabs:not([hasadjacentnewtabbutton]) > #tabbrowser-arrowscrollbox > #tabbrowser-arrowscrollbox-periphery > #tabs-newtab-button,
+ #tabbrowser-tabs[orient="horizontal"] > #vertical-tabs-newtab-button,
+ #tabbrowser-tabs[orient="vertical"]:not([overflow]) > #vertical-tabs-newtab-button,
+ #tabbrowser-arrowscrollbox[overflowing] > #tabbrowser-arrowscrollbox-periphery > #tabs-newtab-button,

src/browser/themes/shared/zen-icons/essential-add.svg

@@ -0,0 +1 @@
+<?xml version="1.0" encoding="utf-8"?><svg version="1.1" xmlns="http://www.w3.org/2000/svg" x="0px" y="0px" viewBox="0 0 122.88 109.57" fill="context-fill" fill-opacity="context-fill-opacity" xml:space="preserve"><g><path d="M65.46,19.57c-0.68,0.72-1.36,1.45-2.2,2.32l-2.31,2.41l-2.4-2.33c-0.71-0.69-1.43-1.4-2.13-2.09 c-7.42-7.3-13.01-12.8-24.52-12.95c-0.45-0.01-0.93,0-1.43,0.02c-6.44,0.23-12.38,2.6-16.72,6.65c-4.28,4-7.01,9.67-7.1,16.57 c-0.01,0.43,0,0.88,0.02,1.37c0.69,19.27,19.13,36.08,34.42,50.01c2.95,2.69,5.78,5.27,8.49,7.88l11.26,10.85l14.15-14.04 c2.28-2.26,4.86-4.73,7.62-7.37c4.69-4.5,9.91-9.49,14.77-14.52c3.49-3.61,6.8-7.24,9.61-10.73c2.76-3.42,5.02-6.67,6.47-9.57 c2.38-4.76,3.13-9.52,2.62-13.97c-0.5-4.39-2.23-8.49-4.82-11.99c-2.63-3.55-6.13-6.49-10.14-8.5C96.5,7.29,91.21,6.2,85.8,6.82 C76.47,7.9,71.5,13.17,65.46,19.57L65.46,19.57z M60.77,14.85C67.67,7.54,73.4,1.55,85.04,0.22c6.72-0.77,13.3,0.57,19.03,3.45 c4.95,2.48,9.27,6.1,12.51,10.47c3.27,4.42,5.46,9.61,6.1,15.19c0.65,5.66-0.29,11.69-3.3,17.69c-1.7,3.39-4.22,7.03-7.23,10.76 c-2.95,3.66-6.39,7.44-10,11.17C97.2,74.08,91.94,79.12,87.2,83.66c-2.77,2.65-5.36,5.13-7.54,7.29L63.2,107.28l-2.31,2.29 l-2.34-2.25l-13.6-13.1c-2.49-2.39-5.37-5.02-8.36-7.75C20.38,71.68,0.81,53.85,0.02,31.77C0,31.23,0,30.67,0,30.09 c0.12-8.86,3.66-16.18,9.21-21.36c5.5-5.13,12.97-8.13,21.01-8.42c0.55-0.02,1.13-0.03,1.74-0.02C46,0.48,52.42,6.63,60.77,14.85 L60.77,14.85z"/></g></svg>

src/browser/themes/shared/zen-icons/essential-remove.svg

@@ -0,0 +1 @@
+<svg data-name="Layer 1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 122.88 109.57" fill="context-fill" fill-opacity="context-fill-opacity"><defs><style>.cls-1{fill-rule:evenodd;}</style></defs><path class="cls-1" d="M94.26,44.46A26.88,26.88,0,1,1,67.38,71.34,26.88,26.88,0,0,1,94.26,44.46ZM65.45,19.57l-4.52,4.74-4.52-4.43C49,12.58,43.4,7.08,31.89,6.93L30.46,7A25.75,25.75,0,0,0,13.74,13.6,22.58,22.58,0,0,0,6.63,30.17l0,1.37c.69,19.27,19.13,36.08,34.42,50,3,2.69,5.78,5.27,8.49,7.88l11.27,10.85,5.91-5.87c.68.8,1.39,1.58,2.13,2.32l0,0c.82.83,1.69,1.61,2.59,2.36l-10.59,10.5L45,94.22c-2.49-2.39-5.37-5-8.37-7.75C20.37,71.68.81,53.85,0,31.77l0-1.68A29.12,29.12,0,0,1,9.21,8.73a32.42,32.42,0,0,1,21-8.42H32c14,.18,20.45,6.34,28.8,14.55C67.66,7.54,73.39,1.55,85,.21a33.88,33.88,0,0,1,19,3.45,35.14,35.14,0,0,1,12.51,10.48,31.53,31.53,0,0,1,6.1,15.18,31,31,0,0,1-2.86,16.81l-.17-.18a36.18,36.18,0,0,0-5.14-4.27,24.26,24.26,0,0,0,1.57-11.6,25,25,0,0,0-4.83-12,28.62,28.62,0,0,0-10.14-8.5A27.27,27.27,0,0,0,85.79,6.82C76.47,7.89,71.5,13.17,65.45,19.57ZM106.15,68a4,4,0,0,1,1.51.3,3.94,3.94,0,0,1,1.29.86,4,4,0,0,1,.85,1.28l0,.06a4,4,0,0,1,.28,1.38V72a3.82,3.82,0,0,1-.3,1.44,4,4,0,0,1-.86,1.29,3.88,3.88,0,0,1-1.27.85l-.07,0a4.23,4.23,0,0,1-1.43.28H82.37a3.85,3.85,0,0,1-1.51-.31l-.06,0a3.92,3.92,0,0,1-1.23-.83,3.87,3.87,0,0,1-.85-1.28l0-.07A4.23,4.23,0,0,1,78.41,72v0a3.8,3.8,0,0,1,.3-1.51A3.95,3.95,0,0,1,82.34,68Z"/></svg>

src/browser/themes/shared/zen-icons/icons.css

@@ -44,6 +44,7 @@
 #stop-button,
 .close-icon,
 #zen-sidebar-web-panel-close,
+#zen-glance-sidebar-close,
 .zen-theme-picker-custom-list-item-remove {
   list-style-image: url('close.svg') !important;
 }
@@ -263,6 +264,7 @@
 
 #restore-button,
 #fullscreen-button,
+#zen-glance-sidebar-open,
 #appMenu-fullscreen-button2 {
   list-style-image: url('fullscreen.svg') !important;
 }
@@ -891,10 +893,18 @@ menuitem[contexttype='fullscreen'][label*='Exit'] {
 #context_pinSelectedTabs,
 #context_unpinSelectedTabs,
 .customize-context-moveToPanel,
-#context_zen-replace-pinned-url-with-current {
+#context_zen-replace-pinned-url-with-current{
   --menu-image: url('pin.svg');
 }
 
+#context_zen-add-essential {
+  --menu-image: url('essential-add.svg');
+}
+
+#context_zen-remove-essential {
+  --menu-image: url('essential-remove.svg');
+}
+
 .customize-context-removeFromToolbar {
   --menu-image: url('unpin.svg');
 }

src/browser/themes/shared/zen-icons/jar.inc.mn

@@ -36,6 +36,8 @@
   skin/classic/browser/zen-icons/edit-select-all.svg                      (../shared/zen-icons/edit-select-all.svg) 
   skin/classic/browser/zen-icons/edit-undo.svg                      (../shared/zen-icons/edit-undo.svg) 
   skin/classic/browser/zen-icons/edit.svg                      (../shared/zen-icons/edit.svg) 
+  skin/classic/browser/zen-icons/essential-add.svg                      (../shared/zen-icons/essential-add.svg) 
+  skin/classic/browser/zen-icons/essential-remove.svg                      (../shared/zen-icons/essential-remove.svg) 
   skin/classic/browser/zen-icons/ext-link.svg                      (../shared/zen-icons/ext-link.svg) 
   skin/classic/browser/zen-icons/extension-blocked.svg                      (../shared/zen-icons/extension-blocked.svg) 
   skin/classic/browser/zen-icons/extension.svg                      (../shared/zen-icons/extension.svg) 

src/dom/ipc/BrowserHost-cpp.patch

@@ -1,13 +0,0 @@
-diff --git a/dom/ipc/BrowserHost.cpp b/dom/ipc/BrowserHost.cpp
-index 489f07a612e52a3edb00f59e53495dcd9e16c0f5..1799e0d416f9d7be2c9e34c237d6ff741e5e2420 100644
---- a/dom/ipc/BrowserHost.cpp
-+++ b/dom/ipc/BrowserHost.cpp
-@@ -106,7 +106,7 @@ void BrowserHost::UpdateEffects(EffectsInfo aEffects) {
- /* attribute boolean renderLayers; */
- NS_IMETHODIMP
- BrowserHost::GetRenderLayers(bool* aRenderLayers) {
--  if (!mRoot) {
-+  if (!mRoot && !Preferences::GetBool("zen.splitView.working", false)) {
-     *aRenderLayers = false;
-     return NS_OK;
-   }

src/toolkit/modules/ActorManagerParent-sys-mjs.patch

@@ -1,25 +0,0 @@
-diff --git a/toolkit/modules/ActorManagerParent.sys.mjs b/toolkit/modules/ActorManagerParent.sys.mjs
-index 71409e58271802fc506999712519df63eff3b1a6..684c9da0139db1dc0962fbb50304ca4f013950ca 100644
---- a/toolkit/modules/ActorManagerParent.sys.mjs
-+++ b/toolkit/modules/ActorManagerParent.sys.mjs
-@@ -666,6 +666,20 @@ if (!Services.prefs.getBoolPref("browser.pagedata.enabled", false)) {
-   };
- }
- 
-+JSWINDOWACTORS.ZenThemeMarketplace = {
-+  parent: {
-+    esModuleURI: "chrome://browser/content/zen-components/actors/ZenThemeMarketplaceParent.sys.mjs",
-+  },
-+  child: {
-+    esModuleURI: "chrome://browser/content/zen-components/actors/ZenThemeMarketplaceChild.sys.mjs",
-+    events: {
-+      DOMContentLoaded: {},
-+    },
-+  },
-+  matches: ["https://*.zen-browser.app/*", "about:preferences"],
-+  allFrames: true,
-+};
-+
- if (AppConstants.platform != "android") {
-   // Note that GeckoView has another implementation in mobile/android/actors.
-   JSWINDOWACTORS.Select = {

src/toolkit/moz-configure.patch

@@ -1,5 +1,5 @@
 diff --git a/toolkit/moz.configure b/toolkit/moz.configure
-index 011eee093dcf77c3c8ad3cd20188b61457d8dc09..d6ffe47cf4d1dfe7a49d7e5f5d84c162b8589cc7 100644
+index 06281a55f43ddff4f4d4a09ba05e9a830a221415..269728dccdd8a286b563a5d20da5280b7b3b1639 100644
 --- a/toolkit/moz.configure
 +++ b/toolkit/moz.configure
 @@ -81,6 +81,9 @@ option(
@@ -25,3 +25,12 @@ index 011eee093dcf77c3c8ad3cd20188b61457d8dc09..d6ffe47cf4d1dfe7a49d7e5f5d84c162
          return True
  
  
+@@ -2036,7 +2039,7 @@ set_define("A11Y_LOG", True, when=a11y_log)
+ # ==============================================================
+ @depends(milestone)
+ def require_signing(milestone):
+-    return milestone.is_release_or_beta and not milestone.is_esr
++    return False
+ 
+ 
+ option(

src/toolkit/mozapps/extensions/internal/XPIProvider-sys-mjs.patch

@@ -1,13 +1,15 @@
 diff --git a/toolkit/mozapps/extensions/internal/XPIProvider.sys.mjs b/toolkit/mozapps/extensions/internal/XPIProvider.sys.mjs
-index 12d4fa1172f4f19df63521fac2bc6f065ae455df..981e3c2e22e59447343cd4b35411041656b2b7ed 100644
+index 6aeb6a6dc7fd46eefac6a0cd56fadaee11efc6c0..abbd17afaadfadb3f97a0553764ac35aab67116c 100644
 --- a/toolkit/mozapps/extensions/internal/XPIProvider.sys.mjs
 +++ b/toolkit/mozapps/extensions/internal/XPIProvider.sys.mjs
-@@ -2546,7 +2546,7 @@ export var XPIProvider = {
-         );
+@@ -2535,8 +2535,8 @@ export var XPIProvider = {
        }
+       // Keep version in sync with toolkit/mozapps/extensions/default-theme/manifest.json
        this.maybeInstallBuiltinAddon(
 -        "default-theme@mozilla.org",
+-        "1.4.1",
 +        "firefox-compact-dark@mozilla.org",
-         "1.3",
++        "1.3",
          "resource://default-theme/"
        );
+ 

src/toolkit/profile/nsToolkitProfileService-cpp.patch

@@ -1,8 +1,8 @@
 diff --git a/toolkit/profile/nsToolkitProfileService.cpp b/toolkit/profile/nsToolkitProfileService.cpp
-index 6e40f51cfc6e76fbd63d87fe7a416481fe9bb2f6..3bc78e3077264387415a06a52a3a8fbc56339484 100644
+index 0587b214ddcf4b12877ca3698ca7d4308b2f0af3..3846515a4fa7b849233de6026f55152478c04f03 100644
 --- a/toolkit/profile/nsToolkitProfileService.cpp
 +++ b/toolkit/profile/nsToolkitProfileService.cpp
-@@ -234,7 +234,7 @@ void RemoveProfileFiles(nsIToolkitProfile* aProfile, bool aInBackground) {
+@@ -229,7 +229,7 @@ void RemoveProfileFiles(nsIToolkitProfile* aProfile, bool aInBackground) {
  }
  
  nsToolkitProfile::nsToolkitProfile(const nsACString& aName, nsIFile* aRootDir,
@@ -11,7 +11,7 @@ index 6e40f51cfc6e76fbd63d87fe7a416481fe9bb2f6..3bc78e3077264387415a06a52a3a8fbc
                                     const nsACString& aStoreID = VoidCString(),
                                     bool aShowProfileSelector = false)
      : mName(aName),
-@@ -244,7 +244,8 @@ nsToolkitProfile::nsToolkitProfile(const nsACString& aName, nsIFile* aRootDir,
+@@ -239,7 +239,8 @@ nsToolkitProfile::nsToolkitProfile(const nsACString& aName, nsIFile* aRootDir,
        mShowProfileSelector(aShowProfileSelector),
        mLock(nullptr),
        mIndex(0),
@@ -21,7 +21,7 @@ index 6e40f51cfc6e76fbd63d87fe7a416481fe9bb2f6..3bc78e3077264387415a06a52a3a8fbc
    NS_ASSERTION(aRootDir, "No file!");
  
    RefPtr<nsToolkitProfile> prev =
-@@ -259,6 +260,10 @@ nsToolkitProfile::nsToolkitProfile(const nsACString& aName, nsIFile* aRootDir,
+@@ -254,6 +255,10 @@ nsToolkitProfile::nsToolkitProfile(const nsACString& aName, nsIFile* aRootDir,
    // If this profile isn't in the database already add it.
    if (!aFromDB) {
      nsINIParser* db = &nsToolkitProfileService::gService->mProfileDB;
@@ -32,7 +32,7 @@ index 6e40f51cfc6e76fbd63d87fe7a416481fe9bb2f6..3bc78e3077264387415a06a52a3a8fbc
      db->SetString(mSection.get(), "Name", mName.get());
  
      bool isRelative = false;
-@@ -268,6 +273,7 @@ nsToolkitProfile::nsToolkitProfile(const nsACString& aName, nsIFile* aRootDir,
+@@ -263,6 +268,7 @@ nsToolkitProfile::nsToolkitProfile(const nsACString& aName, nsIFile* aRootDir,
  
      db->SetString(mSection.get(), "IsRelative", isRelative ? "1" : "0");
      db->SetString(mSection.get(), "Path", descriptor.get());
@@ -40,7 +40,7 @@ index 6e40f51cfc6e76fbd63d87fe7a416481fe9bb2f6..3bc78e3077264387415a06a52a3a8fbc
      if (!mStoreID.IsVoid()) {
        db->SetString(mSection.get(), "StoreID",
                      PromiseFlatCString(mStoreID).get());
-@@ -466,6 +472,8 @@ nsToolkitProfile::SetShowProfileSelector(bool aShowProfileSelector) {
+@@ -462,6 +468,8 @@ nsToolkitProfile::SetShowProfileSelector(bool aShowProfileSelector) {
  #endif
  }
  
@@ -49,14 +49,13 @@ index 6e40f51cfc6e76fbd63d87fe7a416481fe9bb2f6..3bc78e3077264387415a06a52a3a8fbc
  nsresult nsToolkitProfile::RemoveInternal(bool aRemoveFiles,
                                            bool aInBackground) {
    NS_ASSERTION(nsToolkitProfileService::gService, "Whoa, my service is gone.");
-@@ -1158,8 +1166,15 @@ nsresult nsToolkitProfileService::Init() {
+@@ -1145,8 +1153,14 @@ nsresult nsToolkitProfileService::Init() {
        }
      }
  
 -    currentProfile = new nsToolkitProfile(name, rootDir, localDir, true,
 -                                          storeID, showProfileSelector);
 +    nsAutoCString zenProfileAvatar;
-+
 +    rv = mProfileDB.GetString(profileID.get(), "ZenAvatarPath", zenProfileAvatar);
 +    if (NS_FAILED(rv)) {
 +      NS_ERROR("Malformed profiles.ini: ZenAvatarPath= not found");
@@ -67,7 +66,7 @@ index 6e40f51cfc6e76fbd63d87fe7a416481fe9bb2f6..3bc78e3077264387415a06a52a3a8fbc
  
      // If a user has modified the ini file path it may make for a valid profile
      // path but not match what we would have serialised and so may not match
-@@ -1384,7 +1399,7 @@ nsresult nsToolkitProfileService::CreateDefaultProfile(
+@@ -1375,7 +1389,7 @@ nsresult nsToolkitProfileService::CreateDefaultProfile(
    if (mUseDevEditionProfile) {
      name.AssignLiteral(DEV_EDITION_NAME);
    } else if (mUseDedicatedProfile) {
@@ -76,12 +75,12 @@ index 6e40f51cfc6e76fbd63d87fe7a416481fe9bb2f6..3bc78e3077264387415a06a52a3a8fbc
    } else {
      name.AssignLiteral(DEFAULT_NAME);
    }
-@@ -2180,7 +2195,7 @@ nsToolkitProfileService::CreateProfile(nsIFile* aRootDir,
+@@ -2185,7 +2199,7 @@ nsresult nsToolkitProfileService::CreateProfile(nsIFile* aRootDir,
+   rv = CreateTimesInternal(rootDir);
    NS_ENSURE_SUCCESS(rv, rv);
  
-   nsCOMPtr<nsIToolkitProfile> profile =
--      new nsToolkitProfile(aName, rootDir, localDir, false);
-+      new nsToolkitProfile(aName, rootDir, localDir, false, ""_ns);
+-  profile = new nsToolkitProfile(aName, rootDir, localDir, false);
++  profile = new nsToolkitProfile(aName, rootDir, localDir, false, ""_ns);
  
    if (aName.Equals(DEV_EDITION_NAME)) {
      mDevEditionDefault = profile;

src/toolkit/themes/linux/global/menu-css.patch

@@ -1,13 +1,12 @@
 diff --git a/toolkit/themes/linux/global/menu.css b/toolkit/themes/linux/global/menu.css
-index da47f78790a251bb573d992476dc5dac9a870857..c7d019df2164b95fca29ec5a72e7fe4188d1e1e6 100644
+index da47f78790a251bb573d992476dc5dac9a870857..6c7d6cbdaf3f0bd35a52c80785577a6bc0d55e29 100644
 --- a/toolkit/themes/linux/global/menu.css
 +++ b/toolkit/themes/linux/global/menu.css
-@@ -52,7 +52,7 @@ menulist > menupopup > :is(menuitem, menucaption, menu) {
+@@ -52,7 +52,6 @@ menulist > menupopup > :is(menuitem, menucaption, menu) {
  
  .menu-text {
    /* This is (18 + the size of end-padding on .menu-iconic-left)px */
 -  margin-inline-start: 21px;
-+  margin-inline-start: 0;
  }
  
  .menu-accel,

src/toolkit/themes/shared/menulist-shared-css.patch

@@ -1,19 +1,14 @@
 diff --git a/toolkit/themes/shared/menulist-shared.css b/toolkit/themes/shared/menulist-shared.css
-index fa7e68c7b71b28c6dc1b2f67a9868f9ad4090034..9d082381e2d491d63647f8047a748354918686fe 100644
+index 5dd5549674570170a694afbd9ea4526e52e3192a..187fcb57183df6a0ab3701ab79c46d86c5e984b3 100644
 --- a/toolkit/themes/shared/menulist-shared.css
 +++ b/toolkit/themes/shared/menulist-shared.css
-@@ -14,12 +14,13 @@
+@@ -14,7 +14,8 @@
  
  :host(:not([native])) {
    appearance: none;
--  background-color: var(--button-bgcolor, ButtonFace);
+-  background-color: var(--button-background-color);
 +  background-color: var(--zen-colors-tertiary, ButtonFace);
-   color: var(--button-color, ButtonText);
++  border: 1px solid var(--input-border-color, ThreeDShadow);
+   color: var(--button-text-color);
    border-radius: 4px;
    padding-block: 4px;
-   padding-inline: 12px 8px;
-   margin: 5px 2px 3px;
-+  border: 1px solid var(--input-border-color, ThreeDShadow);
- }
- 
- :host(:not([native])[size="medium"]) {

src/widget/ThemeColors-h.patch

@@ -1,20 +0,0 @@
-diff --git a/widget/ThemeColors.h b/widget/ThemeColors.h
-index 739a7ca0f0ff4d1647c5c204b49ba7cc157c76fd..86a89bc890ec5ef824f0a0295876fddb9e363c7c 100644
---- a/widget/ThemeColors.h
-+++ b/widget/ThemeColors.h
-@@ -13,8 +13,14 @@
- 
- namespace mozilla::widget {
- 
-+#ifndef ZEN_DEFAULT_ACCENT_COLOR
-+// Like a normal hex code:
-+// 0xRRGGBBAA
-+#define ZEN_DEFAULT_ACCENT_COLOR 0x000000df
-+#endif
-+
- static constexpr gfx::sRGBColor sDefaultAccent(
--    gfx::sRGBColor::UnusualFromARGB(0xff0060df));  // Luminance: 13.69346%
-+    gfx::sRGBColor::UnusualFromARGB(ZEN_DEFAULT_ACCENT_COLOR));  // Luminance: 13.69346%
- static constexpr gfx::sRGBColor sDefaultAccentText(
-     gfx::sRGBColor::OpaqueWhite());
- 

src/widget/cocoa/VibrancyManager-mm.patch

@@ -0,0 +1,13 @@
+diff --git a/widget/cocoa/VibrancyManager.mm b/widget/cocoa/VibrancyManager.mm
+index e8263ee480a0249cae760ee5b9037bb87acafecc..aefc887208659e46191eebfde1f9f74f1eac77a5 100644
+--- a/widget/cocoa/VibrancyManager.mm
++++ b/widget/cocoa/VibrancyManager.mm
+@@ -39,7 +39,7 @@ static NSVisualEffectMaterial VisualEffectMaterialForVibrancyType(
+     case VibrancyType::Sidebar:
+       return NSVisualEffectMaterialSidebar;
+     case VibrancyType::Titlebar:
+-      return NSVisualEffectMaterialTitlebar;
++      return NSVisualEffectMaterialUnderWindowBackground;
+   }
+ }
+ 

surfer.json

@@ -5,7 +5,7 @@
   "binaryName": "zen",
   "version": {
     "product": "firefox",
-    "version": "131.0.3"
+    "version": "132.0.1"
   },
   "buildOptions": {
     "generateBranding": true
@@ -18,7 +18,7 @@
       "brandShortName": "Zen Browser",
       "brandFullName": "Zen Browser",
       "release": {
-        "displayVersion": "1.0.1-a.14",
+        "displayVersion": "1.0.1-a.22",
         "github": {
           "repo": "zen-browser/desktop"
         },
@@ -26,7 +26,7 @@
           "windows": "windows.mar",
           "macos-aarch64": "macos-aarch64.mar",
           "linux": "linux.mar",
-          "macos-x64": "macos-x64.mar",
+          "macos-x64": "macos-x86_64.mar",
           "windows-compat": "windows-generic.mar",
           "linux-compat": "linux-generic.mar"
         }
@@ -38,7 +38,7 @@
       "brandShortName": "Zen Twilight",
       "brandFullName": "Zen Twilight",
       "release": {
-        "displayVersion": "1.0.1-t.14",
+        "displayVersion": "1.0.1-t.22",
         "github": {
           "repo": "zen-browser/desktop"
         },