diff --git a/.vscode/settings.json b/.vscode/settings.json
index 7b818271c..56c7323eb 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -11,6 +11,8 @@
     "istream": "cpp",
     "tuple": "cpp",
     "utility": "cpp",
-    "variant": "cpp"
+    "variant": "cpp",
+    "compare": "cpp",
+    "thread": "cpp"
   }
 }
\ No newline at end of file
diff --git a/src/browser/base/content/browser-sets-inc.patch b/src/browser/base/content/browser-sets-inc.patch
new file mode 100644
index 000000000..2b07b31aa
--- /dev/null
+++ b/src/browser/base/content/browser-sets-inc.patch
@@ -0,0 +1,12 @@
+diff --git a/browser/base/content/browser-sets.inc b/browser/base/content/browser-sets.inc
+index 019b3cc4691520667f9bd595444e7cc752307c98..17057b24e86dce43da30bf95d1d229044704546f 100644
+--- a/browser/base/content/browser-sets.inc
++++ b/browser/base/content/browser-sets.inc
+@@ -15,6 +15,7 @@
+   </stringbundleset>
+ 
+   <commandset id="mainCommandSet">
++    <command id="Tools:ZenProfiles" oncommand="BrowserOpenZenProfilesMgr();"/>
+     <command id="cmd_newNavigator" oncommand="OpenBrowserWindow()"/>
+     <command id="cmd_handleBackspace" oncommand="BrowserHandleBackspace();" />
+     <command id="cmd_handleShiftBackspace" oncommand="BrowserHandleShiftBackspace();" />
diff --git a/src/browser/base/content/global-scripts-inc.patch b/src/browser/base/content/global-scripts-inc.patch
index 3868907f6..e6f288afb 100644
--- a/src/browser/base/content/global-scripts-inc.patch
+++ b/src/browser/base/content/global-scripts-inc.patch
@@ -1,8 +1,16 @@
 diff --git a/browser/base/content/global-scripts.inc b/browser/base/content/global-scripts.inc
-index f5f43b8f9509c37bf217b3ed1c6c562be85430e0..c8ab55760f817aa14e3db15f6b5556118e65d218 100644
+index f5f43b8f9509c37bf217b3ed1c6c562be85430e0..41fb7b9439a1be9c47a7f200546b0230ec6a7505 100644
 --- a/browser/base/content/global-scripts.inc
 +++ b/browser/base/content/global-scripts.inc
-@@ -22,4 +22,6 @@ if (AppConstants.platform == "macosx") {
+@@ -12,6 +12,7 @@
+ # tools/lint/eslint/eslint-plugin-mozilla/lib/environments/browser-window.js
+ 
+ <script type="text/javascript">
++Services.scriptloader.loadSubScript("chrome://browser/content/zen-browser.js", this);
+ Services.scriptloader.loadSubScript("chrome://browser/content/browser.js", this);
+ Services.scriptloader.loadSubScript("chrome://browser/content/places/browserPlacesViews.js", this);
+ Services.scriptloader.loadSubScript("chrome://browser/content/browser-places.js", this);
+@@ -22,4 +23,6 @@ if (AppConstants.platform == "macosx") {
    Services.scriptloader.loadSubScript("chrome://global/content/macWindowMenu.js", this);
  }
  
diff --git a/src/browser/base/content/zen-browser-places.js b/src/browser/base/content/zen-browser-places.js
index dbdc6d8bd..ed68fa8d1 100644
--- a/src/browser/base/content/zen-browser-places.js
+++ b/src/browser/base/content/zen-browser-places.js
@@ -19,7 +19,7 @@ var ZenProfileDialogUI = {
       if (profile == ProfileService.currentProfile) {
         continue;
       }
-      let item = document.createElement('menu');
+      let item = document.createElement('div');
       item.onclick = () => this._openProfile(profile);
       item.className = 'PanelUI-zen-profiles-item';
       let avatar = document.createElement('img');
diff --git a/src/browser/base/content/zen-browser.js b/src/browser/base/content/zen-browser.js
new file mode 100644
index 000000000..a51f87b37
--- /dev/null
+++ b/src/browser/base/content/zen-browser.js
@@ -0,0 +1,61 @@
+var { XPCOMUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/XPCOMUtils.sys.mjs"
+);
+
+function BrowserOpenZenProfilesMgr(aView, { selectTabByViewId = false } = {}) {
+  return new Promise(resolve => {
+    let emWindow;
+    let browserWindow;
+
+    var receivePong = function (aSubject, aTopic, aData) {
+      let browserWin = aSubject.browsingContext.topChromeWindow;
+      if (!emWindow || browserWin == window /* favor the current window */) {
+        if (
+          selectTabByViewId &&
+          aSubject.gViewController.currentViewId !== aView
+        ) {
+          return;
+        }
+
+        emWindow = aSubject;
+        browserWindow = browserWin;
+      }
+    };
+    Services.obs.addObserver(receivePong, "EM-pong");
+    Services.obs.notifyObservers(null, "EM-ping");
+    Services.obs.removeObserver(receivePong, "EM-pong");
+
+    if (emWindow) {
+      if (aView && !selectTabByViewId) {
+        emWindow.loadView(aView);
+      }
+      let tab = browserWindow.gBrowser.getTabForBrowser(
+        emWindow.docShell.chromeEventHandler
+      );
+      browserWindow.gBrowser.selectedTab = tab;
+      emWindow.focus();
+      resolve(emWindow);
+      return;
+    }
+
+    if (selectTabByViewId) {
+      const target = isBlankPageURL(gBrowser.currentURI.spec)
+        ? "current"
+        : "tab";
+      openTrustedLinkIn("about:profiles", target);
+    } else {
+      // This must be a new load, else the ping/pong would have
+      // found the window above.
+      switchToTabHavingURI("about:profiles", true);
+    }
+
+    Services.obs.addObserver(function observer(aSubject, aTopic, aData) {
+      Services.obs.removeObserver(observer, aTopic);
+      if (aView) {
+        aSubject.loadView(aView);
+      }
+      aSubject.focus();
+      resolve(aSubject);
+    }, "EM-loaded");
+  });
+}
diff --git a/src/browser/base/content/zen-panels-ui.inc.xhtml b/src/browser/base/content/zen-panels-ui.inc.xhtml
index 669092482..b460c7d56 100644
--- a/src/browser/base/content/zen-panels-ui.inc.xhtml
+++ b/src/browser/base/content/zen-panels-ui.inc.xhtml
@@ -11,7 +11,7 @@
     </vbox>
     <toolbarseparator />
     <menuitem command="Tools:PrivateBrowsing" data-l10n-id="appmenuitem-new-private-window" class="PanelUI-zen-profiles-item"></menuitem>
-    <menuitem oncommand="alert('todo: open about:profiles!');" data-l10n-id="appmenuitem-new-zen-profiles-tab" class="PanelUI-zen-profiles-item"></menuitem>
+    <menuitem command="Tools:ZenProfiles" data-l10n-id="appmenuitem-new-zen-profiles-tab" class="PanelUI-zen-profiles-item"></menuitem>
     <menuitem oncommand="ZenProfileDialogUI.createProfileWizard();" data-l10n-id="appmenuitem-new-zen-create-profile" class="PanelUI-zen-profiles-item"></menuitem>
   </vbox>
 </panelview>
\ No newline at end of file
diff --git a/src/browser/base/content/zen-scripts.jar.inc.mn b/src/browser/base/content/zen-scripts.jar.inc.mn
new file mode 100644
index 000000000..80edd0062
--- /dev/null
+++ b/src/browser/base/content/zen-scripts.jar.inc.mn
@@ -0,0 +1,2 @@
+        content/browser/zen-browser-places.js                   (content/zen-browser-places.js)
+        content/browser/zen-browser.js                   (content/zen-browser.js)
\ No newline at end of file
diff --git a/src/browser/base/jar-mn.patch b/src/browser/base/jar-mn.patch
index 594d85ae7..64c789b58 100644
--- a/src/browser/base/jar-mn.patch
+++ b/src/browser/base/jar-mn.patch
@@ -1,5 +1,5 @@
 diff --git a/browser/base/jar.mn b/browser/base/jar.mn
-index e3eb0e6e5f30152905456a07cfe532fe173375fb..15e742e4cfd9df8eef815f80a4d668f118108c4c 100644
+index e3eb0e6e5f30152905456a07cfe532fe173375fb..9d356d62421d779f9e16f6761cce97826c7943ed 100644
 --- a/browser/base/jar.mn
 +++ b/browser/base/jar.mn
 @@ -105,3 +105,6 @@ browser.jar:
@@ -8,4 +8,5 @@ index e3eb0e6e5f30152905456a07cfe532fe173375fb..15e742e4cfd9df8eef815f80a4d668f1
  % override chrome://global/locale/appstrings.properties chrome://browser/locale/appstrings.properties
 +
 +#include content/zen-avatars/jar.inc.mn
-+        content/browser/zen-browser-places.js                   (content/zen-browser-places.js)
++#include content/zen-scripts.jar.inc.mn
+\ No newline at end of file
diff --git a/src/browser/components/aboutwelcome/actors/AboutWelcomeParent-sys-mjs.patch b/src/browser/components/aboutwelcome/actors/AboutWelcomeParent-sys-mjs.patch
deleted file mode 100644
index 7e6f6b5db..000000000
--- a/src/browser/components/aboutwelcome/actors/AboutWelcomeParent-sys-mjs.patch
+++ /dev/null
@@ -1,17 +0,0 @@
-diff --git a/browser/components/aboutwelcome/actors/AboutWelcomeParent.sys.mjs b/browser/components/aboutwelcome/actors/AboutWelcomeParent.sys.mjs
-index 1eb77da0d8f9db02b3afad9d3cdd438cb6f58cd7..25806b026b4da05add168f2f0e556a877d772e1a 100644
---- a/browser/components/aboutwelcome/actors/AboutWelcomeParent.sys.mjs
-+++ b/browser/components/aboutwelcome/actors/AboutWelcomeParent.sys.mjs
-@@ -42,9 +42,9 @@ const AWTerminate = {
- };
- const LIGHT_WEIGHT_THEMES = {
-   AUTOMATIC: "default-theme@mozilla.org",
--  DARK: "firefox-compact-dark@mozilla.org",
--  LIGHT: "firefox-compact-light@mozilla.org",
--  ALPENGLOW: "firefox-alpenglow@mozilla.org",
-+  DARK: "zen-compact-dark@mozilla.org",
-+  LIGHT: "zen-compact-light@mozilla.org",
-+  ALPENGLOW: "zen-compact-universe@mozilla.org",
- };
- 
- class AboutWelcomeObserver {
diff --git a/src/browser/locales/en-US/browser/appExtensionFields-ftl.patch b/src/browser/locales/en-US/browser/appExtensionFields-ftl.patch
index f5aa15300..b987dc904 100644
--- a/src/browser/locales/en-US/browser/appExtensionFields-ftl.patch
+++ b/src/browser/locales/en-US/browser/appExtensionFields-ftl.patch
@@ -1,8 +1,8 @@
 diff --git a/browser/locales/en-US/browser/appExtensionFields.ftl b/browser/locales/en-US/browser/appExtensionFields.ftl
-index 09d7a076eccd4235fac66156770d8b9ae01a7d16..a4937b9470fffc187eb521f45362703909ec09b9 100644
+index 09d7a076eccd4235fac66156770d8b9ae01a7d16..31c7632c9dce24f2e4e5135abfca96a47e961eed 100644
 --- a/browser/locales/en-US/browser/appExtensionFields.ftl
 +++ b/browser/locales/en-US/browser/appExtensionFields.ftl
-@@ -8,14 +8,14 @@
+@@ -8,13 +8,13 @@
  extension-default-theme-name-auto=System theme — auto
  extension-default-theme-description=Follow the operating system setting for buttons, menus, and windows.
  
@@ -15,9 +15,7 @@ index 09d7a076eccd4235fac66156770d8b9ae01a7d16..a4937b9470fffc187eb521f453627039
  extension-firefox-compact-dark-description=A theme with a dark color scheme.
  
 -extension-firefox-alpenglow-name=Firefox Alpenglow
--extension-firefox-alpenglow-description=Use a colorful appearance for buttons, menus, and windows.
-+extension-zen-compact-universe-name=Zen Universe
-+extension-zen-compact-universe-description=Use a colorful appearance for buttons, menus, and windows.
++extension-firefox-alpenglow-name=Zen Universe
+ extension-firefox-alpenglow-description=Use a colorful appearance for buttons, menus, and windows.
  
  ## Colorway Themes
- ## These themes are variants of a colorway. The colorway is specified in the
diff --git a/src/browser/themes/BuiltInThemeConfig-sys-mjs.patch b/src/browser/themes/BuiltInThemeConfig-sys-mjs.patch
deleted file mode 100644
index 11673465e..000000000
--- a/src/browser/themes/BuiltInThemeConfig-sys-mjs.patch
+++ /dev/null
@@ -1,27 +0,0 @@
-diff --git a/browser/themes/BuiltInThemeConfig.sys.mjs b/browser/themes/BuiltInThemeConfig.sys.mjs
-index 7cfea4b705a1338b1eb5c4f255808aeac4bdb819..58bf9d46222f1032c71a1385109ca4734b777629 100644
---- a/browser/themes/BuiltInThemeConfig.sys.mjs
-+++ b/browser/themes/BuiltInThemeConfig.sys.mjs
-@@ -22,19 +22,19 @@ 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",
-       path: "resource://builtin-themes/dark/",
-     },
-   ],
-   [
--    "firefox-alpenglow@mozilla.org",
-+    "zen-compact-universe@mozilla.org",
-     {
-       version: "1.4",
-       path: "resource://builtin-themes/alpenglow/",
diff --git a/src/browser/themes/addons/alpenglow/manifest-json.patch b/src/browser/themes/addons/alpenglow/manifest-json.patch
index c7182ec59..b48595fb9 100644
--- a/src/browser/themes/addons/alpenglow/manifest-json.patch
+++ b/src/browser/themes/addons/alpenglow/manifest-json.patch
@@ -1,24 +1,17 @@
 diff --git a/browser/themes/addons/alpenglow/manifest.json b/browser/themes/addons/alpenglow/manifest.json
-index 05a25e13915edee3ba51ed1c1b5569faa70cd536..9d58f14305c27d4fb4a68c9182aafe0826826746 100644
+index 05a25e13915edee3ba51ed1c1b5569faa70cd536..5a5bf6766e45d339b1b17e4b1e88b302a34025f6 100644
 --- a/browser/themes/addons/alpenglow/manifest.json
 +++ b/browser/themes/addons/alpenglow/manifest.json
-@@ -3,137 +3,99 @@
- 
-   "browser_specific_settings": {
-     "gecko": {
--      "id": "firefox-alpenglow@mozilla.org"
-+      "id": "zen-compact-universe@mozilla.org"
+@@ -7,133 +7,94 @@
      }
    },
  
 -  "name": "Firefox Alpenglow",
 -  "description": "Use a colorful appearance for buttons, menus, and windows.",
--  "version": "1.4",
 +  "name": "Zen Universe (Light)",
 +  "description": "A theme with a light color scheme.",
 +  "author": "Zen",
-+  "version": "1.3",
-+
+   "version": "1.4",
    "icons": { "32": "icon.svg" },
  
    "theme": {
diff --git a/src/browser/tools/mozscreenshots/mozscreenshots/extension/configurations/LightweightThemes-sys-mjs.patch b/src/browser/tools/mozscreenshots/mozscreenshots/extension/configurations/LightweightThemes-sys-mjs.patch
deleted file mode 100644
index cab472c7e..000000000
--- a/src/browser/tools/mozscreenshots/mozscreenshots/extension/configurations/LightweightThemes-sys-mjs.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/browser/tools/mozscreenshots/mozscreenshots/extension/configurations/LightweightThemes.sys.mjs b/browser/tools/mozscreenshots/mozscreenshots/extension/configurations/LightweightThemes.sys.mjs
-index 91c3349ec737aa12518b596f1e6278eb27f0f5ec..15331c3d170acb1b12c7f4a9ac6134e497b31a96 100644
---- a/browser/tools/mozscreenshots/mozscreenshots/extension/configurations/LightweightThemes.sys.mjs
-+++ b/browser/tools/mozscreenshots/mozscreenshots/extension/configurations/LightweightThemes.sys.mjs
-@@ -42,7 +42,7 @@ export var LightweightThemes = {
-       selectors: [],
-       async applyConfig() {
-         let addon = await AddonManager.getAddonByID(
--          "firefox-alpenglow@mozilla.org"
-+          "zen-compact-universe@mozilla.org"
-         );
-         await addon.enable();
-       },