closes #14331 : Refactor SR to support container tab forcing

gh-14320: fix workspace change icon picker state when opening (gh-14321)
The picker reset its page with a smooth scrollIntoView while the popup was hiding, and positioned the page before the popup was laid out, so it could animate/jump on open. Reset instantly on popupshown (after layout) instead, and drop the on-hide scroll so there's no visible animation.
2026-06-22 10:53:22 +00:00 · 2026-06-22 12:13:52 +02:00 · 2026-06-21 21:43:44 +02:00 · 2026-06-21 15:18:02 +02:00 · 2026-06-21 11:20:37 +02:00 · 2026-06-20 17:18:41 +02:00
14 changed files with 270 additions and 228 deletions
--- a/README.md
+++ b/README.md
@@ -34,8 +34,8 @@ Zen is a firefox-based browser with the aim of pushing your productivity to a ne

 ### Firefox Versions

- [`Release`](https://zen-browser.app/download) - Is currently built using Firefox version `152.0`! 🚀
- [`Twilight`](https://zen-browser.app/download?twilight) - Is currently built using Firefox version `RC 152.0`!
+- [`Release`](https://zen-browser.app/download) - Is currently built using Firefox version `152.0.1`! 🚀
+- [`Twilight`](https://zen-browser.app/download?twilight) - Is currently built using Firefox version `RC 152.0.1`!

 ### Contributing

--- a/build/firefox-cache/l10n-last-commit-hash
+++ b/build/firefox-cache/l10n-last-commit-hash
@@ -1 +1 @@
-01604ce201d4de3c6d4b930d271ce4fe05e8d0c8
+2960f4c1ce58d289d3b9ec885695f0017d2636ab
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
    "build": "surfer build",
    "build:ui": "surfer build --ui",
    "start": "cd engine && python3 ./mach run --noprofile",
+    "start:debug": "npm start -- --jsdebugger --wait-for-jsdebugger",
    "start:bloat": "XPCOM_MEM_BLOAT_LOG=1 npm start",
    "import": "npm run ffprefs && npm run import:dumps && surfer import",
    "import:dumps": "python3 scripts/update_service_dumps.py",
--- a/prefs/zen/windows.yaml
+++ b/prefs/zen/windows.yaml
@@ -7,10 +7,6 @@
  value: true
  condition: "defined(XP_WIN)"

- name: widget.windows.mica.popups
-  value: true
-  condition: "defined(XP_WIN)"
-
 # 1 = DWMSBT_MAINWINDOW
 # 2 = DWMSBT_TRANSIENTWINDOW (default, also used for popups)
 # 3 = DWMSBT_TABBEDWINDOW
--- a/src/browser/components/nova/NovaPrefs-sys-mjs.patch
+++ b/src/browser/components/nova/NovaPrefs-sys-mjs.patch
@@ -0,0 +1,13 @@
+diff --git a/browser/components/nova/NovaPrefs.sys.mjs b/browser/components/nova/NovaPrefs.sys.mjs
+index 3d22c881c481643fcffbc581523905a1847a7d41..453dd4d9c43d7483c037a993afbf2b854533497c 100644
+--- a/browser/components/nova/NovaPrefs.sys.mjs
+++ b/browser/components/nova/NovaPrefs.sys.mjs
+@@ -18,7 +18,7 @@ const PLATFORM_PREFS = (() => {
+ })();
+ 
+ function applyNovaPlatformDefaults() {
+-  const on = Services.prefs.getBoolPref("browser.nova.enabled", false);
+  const on = true;
+   const defaults = Services.prefs.getDefaultBranch("");
+   for (const pref of PLATFORM_PREFS) {
+     defaults.setBoolPref(pref, on);
--- a/src/browser/components/preferences/preferences-js.patch
+++ b/src/browser/components/preferences/preferences-js.patch
@@ -1,5 +1,5 @@
 diff --git a/browser/components/preferences/preferences.js b/browser/components/preferences/preferences.js
-index 57add34d876fb885275f1147209c6fbeee367a7c..5f4616d5f7d3d077326246e843775f58c293ee48 100644
+index 57add34d876fb885275f1147209c6fbeee367a7c..be0ab43b299317c0022a5e719f47a070c1574714 100644
 --- a/browser/components/preferences/preferences.js
 +++ b/browser/components/preferences/preferences.js
@@ -132,6 +132,7 @@ ChromeUtils.defineLazyGetter(this, "gSubDialog", function () {
@@ -39,9 +39,12 @@ index 57add34d876fb885275f1147209c6fbeee367a7c..5f4616d5f7d3d077326246e843775f58
 
   // Restore the cached Firefox Labs nav button visibility so it shows
   // immediately when recipes are expected to be available, before
-@@ -653,7 +660,7 @@ async function gotoPref(
+@@ -651,9 +658,9 @@ async function gotoPref(
+   let redesignEnabled = srdSectionPrefs.all;
+   let categories = document.getElementById("categories");
   const kDefaultCategoryInternalName = redesignEnabled
-     ? "paneSync"
+-    ? "paneSync"
+    ? "paneTabsBrowsing"
     : "paneGeneral";
 -  const kDefaultCategory = redesignEnabled ? "sync" : "general";
 +  const kDefaultCategory = redesignEnabled ? "tabsBrowsing" : "general";
--- a/src/browser/components/tabbrowser/content/tabbrowser-js.patch
+++ b/src/browser/components/tabbrowser/content/tabbrowser-js.patch
@@ -1,5 +1,5 @@
 diff --git a/browser/components/tabbrowser/content/tabbrowser.js b/browser/components/tabbrowser/content/tabbrowser.js
-index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f3682852f8a52bd 100644
+index 08b5b56e069d038d72c87355920c4ce8a55ed805..99b3de9a7be5cd5fd73c0b9dbbe265655d7171ce 100644
 --- a/browser/components/tabbrowser/content/tabbrowser.js
 +++ b/browser/components/tabbrowser/content/tabbrowser.js
@@ -511,6 +511,7 @@
@@ -285,22 +285,21 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       } = {}
     ) {
       // all callers of addTab that pass a params object need to pass
-@@ -3347,10 +3438,25 @@
+@@ -3347,10 +3438,24 @@
         );
       }
 
-+      const beforeRouteResult = window.gZenSpaceRoutingManager.onBeforeAddTab(uriString, { skipRoute, pinned, tabGroup, fromExternal }, window);
+      const beforeRouteResult = window.gZenSpaceRoutingManager.onBeforeAddTab(uriString, { skipRoute, pinned, tabGroup, fromExternal, zenWorkspaceId }, window);
 +      if (beforeRouteResult.shouldEarlyExit) {
 +        return null;
 +      }
 +
 +      let hasZenDefaultUserContextId = false;
-+      let zenForcedWorkspaceId = undefined;
 +      if (beforeRouteResult.isRouteFound && typeof userContextId !== "undefined") {
 +        userContextId = beforeRouteResult.userContextId;
 +        hasZenDefaultUserContextId = true;
 +      } else if (typeof gZenWorkspaces !== "undefined" && !_forZenEmptyTab) {
-+        [userContextId, hasZenDefaultUserContextId, zenForcedWorkspaceId] = gZenWorkspaces.getContextIdIfNeeded(userContextId, fromExternal, triggeringPrincipal);
+        [userContextId, hasZenDefaultUserContextId] = gZenWorkspaces.getContextIdIfNeeded(userContextId, fromExternal, triggeringPrincipal);
 +      }
 +
       if (!UserInteraction.running("browser.tabs.opening", window)) {
@@ -311,7 +310,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       // If we're opening a foreground tab, set the owner by default.
       ownerTab ??= inBackground ? null : this.selectedTab;
 
-@@ -3358,6 +3464,7 @@
+@@ -3358,6 +3463,7 @@
       if (this.selectedTab.owner) {
         this.selectedTab.owner = null;
       }
@@ -319,7 +318,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
 
       // Find the tab that opened this one, if any. This is used for
       // determining positioning, and inherited attributes such as the
-@@ -3410,6 +3517,22 @@
+@@ -3410,6 +3516,18 @@
           noInitialLabel,
           skipBackgroundNotify,
         });
@@ -328,10 +327,6 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
 +        }
 +        if (zenWorkspaceId) {
 +          t.setAttribute("zen-workspace-id", zenWorkspaceId);
-+          t.setAttribute("change-workspace", "")
-+        } else if (zenForcedWorkspaceId !== undefined) {
-+          t.setAttribute("zen-workspace-id", zenForcedWorkspaceId);
-+          t.setAttribute("change-workspace", "")
 +        }
 +        if (_forZenEmptyTab) {
 +          t.setAttribute("zen-empty-tab", "true");
@@ -342,7 +337,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
         if (insertTab) {
           // Insert the tab into the tab container in the correct position.
           this.#insertTabAtIndex(t, {
-@@ -3418,6 +3541,7 @@
+@@ -3418,6 +3536,7 @@
             ownerTab,
             openerTab,
             pinned,
@@ -350,7 +345,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
             bulkOrderedOpen,
             tabGroup: tabGroup ?? openerTab?.group,
           });
-@@ -3436,6 +3560,7 @@
+@@ -3436,6 +3555,7 @@
           openWindowInfo,
           skipLoad,
           triggeringRemoteType,
@@ -358,7 +353,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
         }));
 
         if (focusUrlBar) {
-@@ -3560,6 +3685,12 @@
+@@ -3560,6 +3680,12 @@
         }
       }
 
@@ -371,7 +366,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       // Additionally send pinned tab events
       if (pinned) {
         this.#notifyPinnedStatus(t);
-@@ -3570,6 +3701,15 @@
+@@ -3570,6 +3696,15 @@
       if (!inBackground) {
         this.selectedTab = t;
       }
@@ -387,7 +382,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       return t;
     }
 
-@@ -3802,6 +3942,7 @@
+@@ -3802,6 +3937,7 @@
         isAdoptingGroup = false,
         isUserTriggered = false,
         telemetryUserCreateSource = "unknown",
@@ -395,7 +390,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       } = {}
     ) {
       if (
-@@ -3812,9 +3953,6 @@
+@@ -3812,9 +3948,6 @@
             !this.isSplitViewWrapper(tabOrSplitView)
         )
       ) {
@@ -405,7 +400,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       }
 
       if (!color) {
-@@ -3835,9 +3973,14 @@
+@@ -3835,9 +3968,14 @@
         label,
         isAdoptingGroup
       );
@@ -422,7 +417,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       );
       group.addTabs(tabsAndSplitViews);
 
-@@ -3958,7 +4101,7 @@
+@@ -3958,7 +4096,7 @@
       }
 
       this.#handleTabMove(tab, () =>
@@ -431,7 +426,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       );
     }
 
-@@ -4044,6 +4187,7 @@
+@@ -4044,6 +4182,7 @@
         color: group.color,
         insertBefore: newTabs[0],
         isAdoptingGroup: true,
@@ -439,7 +434,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       });
     }
 
-@@ -4254,6 +4398,7 @@
+@@ -4254,6 +4393,7 @@
         openWindowInfo,
         skipLoad,
         triggeringRemoteType,
@@ -447,7 +442,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       }
     ) {
       // If we don't have a preferred remote type (or it is `NOT_REMOTE`), and
-@@ -4323,6 +4468,7 @@
+@@ -4323,6 +4463,7 @@
           openWindowInfo,
           name,
           skipLoad,
@@ -455,7 +450,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
         });
       }
 
-@@ -4536,9 +4682,9 @@
+@@ -4536,9 +4677,9 @@
         }
 
         // Add a new tab if needed.
@@ -467,7 +462,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
 
           let url = "about:blank";
           if (tabData.entries?.length) {
-@@ -4575,8 +4721,10 @@
+@@ -4575,8 +4716,10 @@
             insertTab: false,
             skipLoad: true,
             preferredRemoteType,
@@ -479,7 +474,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
           if (select) {
             tabToSelect = tab;
           }
-@@ -4598,7 +4746,8 @@
+@@ -4598,7 +4741,8 @@
           this.pinTab(tab);
           // Then ensure all the tab open/pinning information is sent.
           this._fireTabOpen(tab, {});
@@ -489,7 +484,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
           let { groupId } = tabData;
           const tabGroup = tabGroupWorkingData.get(groupId);
           // if a tab refers to a tab group we don't know, skip any group
-@@ -4618,7 +4767,10 @@
+@@ -4618,7 +4762,10 @@
                 tabGroup.stateData.id,
                 tabGroup.stateData.color,
                 tabGroup.stateData.collapsed,
@@ -501,7 +496,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
               );
               tabsFragment.appendChild(tabGroup.node);
             }
-@@ -4673,9 +4825,21 @@
+@@ -4673,9 +4820,21 @@
       // to remove the old selected tab.
       if (tabToSelect) {
         let leftoverTab = this.selectedTab;
@@ -523,7 +518,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
 
       if (tabs.length > 1 || !tabs[0].selected) {
         this._updateTabsAfterInsert();
-@@ -4866,11 +5030,14 @@
+@@ -4866,11 +5025,14 @@
       if (ownerTab) {
         tab.owner = ownerTab;
       }
@@ -539,7 +534,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
         if (
           !bulkOrderedOpen &&
           ((openerTab &&
-@@ -4882,7 +5049,7 @@
+@@ -4882,7 +5044,7 @@
           let lastRelatedTab =
             openerTab && this._lastRelatedTabMap.get(openerTab);
           let previousTab = lastRelatedTab || openerTab || this.selectedTab;
@@ -548,7 +543,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
             tabGroup = previousTab.group;
           }
           if (
-@@ -4898,7 +5065,7 @@
+@@ -4898,7 +5060,7 @@
                 previousTab.splitview
               ) + 1;
           } else if (previousTab.visible) {
@@ -557,7 +552,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
           } else if (previousTab == FirefoxViewHandler.tab) {
             elementIndex = 0;
           }
-@@ -4926,14 +5093,14 @@
+@@ -4926,14 +5088,14 @@
       }
       // Ensure index is within bounds.
       if (tab.pinned) {
@@ -576,7 +571,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
 
       if (pinned && !itemAfter?.pinned) {
         itemAfter = null;
-@@ -4950,7 +5117,7 @@
+@@ -4950,7 +5112,7 @@
 
       this.tabContainer._invalidateCachedTabs();
 
@@ -585,7 +580,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
         if (
           (this.isTab(itemAfter) && itemAfter.group == tabGroup) ||
           this.isSplitViewWrapper(itemAfter)
-@@ -4981,7 +5148,11 @@
+@@ -4981,7 +5143,11 @@
         const tabContainer = pinned
           ? this.tabContainer.pinnedTabsContainer
           : this.tabContainer;
@@ -597,7 +592,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       }
 
       if (tab.group?.collapsed) {
-@@ -4996,6 +5167,7 @@
+@@ -4996,6 +5162,7 @@
       if (pinned) {
         this._updateTabBarForPinnedTabs();
       }
@@ -605,7 +600,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
 
       TabBarVisibility.update();
     }
-@@ -5544,6 +5716,7 @@
+@@ -5544,6 +5711,7 @@
         telemetrySource,
       } = {}
     ) {
@@ -613,7 +608,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       // When 'closeWindowWithLastTab' pref is enabled, closing all tabs
       // can be considered equivalent to closing the window.
       if (
-@@ -5633,6 +5806,7 @@
+@@ -5633,6 +5801,7 @@
         if (lastToClose) {
           this.removeTab(lastToClose, aParams);
         }
@@ -621,7 +616,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       } catch (e) {
         console.error(e);
       }
-@@ -5678,6 +5852,14 @@
+@@ -5678,6 +5847,14 @@
         return;
       }
 
@@ -636,7 +631,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       let isVisibleTab = aTab.visible;
       // We have to sample the tab width now, since _beginRemoveTab might
       // end up modifying the DOM in such a way that aTab gets a new
-@@ -5685,6 +5867,9 @@
+@@ -5685,6 +5862,9 @@
       // state).
       let tabWidth = window.windowUtils.getBoundsWithoutFlushing(aTab).width;
       let isLastTab = this.#isLastTabInWindow(aTab);
@@ -646,7 +641,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       if (
         !this._beginRemoveTab(aTab, {
           closeWindowFastpath: true,
-@@ -5696,13 +5881,14 @@
+@@ -5696,13 +5876,14 @@
           telemetrySource,
         })
       ) {
@@ -662,7 +657,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       let lockTabSizing =
         !this.tabContainer.verticalMode &&
         !aTab.pinned &&
-@@ -5733,7 +5919,13 @@
+@@ -5733,7 +5914,13 @@
         // We're not animating, so we can cancel the animation stopwatch.
         Glean.browserTabclose.timeAnim.cancel(aTab._closeTimeAnimTimerId);
         aTab._closeTimeAnimTimerId = null;
@@ -677,7 +672,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
         return;
       }
 
-@@ -5867,7 +6059,7 @@
+@@ -5867,7 +6054,7 @@
           closeWindowWithLastTab != null
             ? closeWindowWithLastTab
             : !window.toolbar.visible ||
@@ -686,7 +681,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
 
         if (closeWindow) {
           // We've already called beforeunload on all the relevant tabs if we get here,
-@@ -5891,6 +6083,7 @@
+@@ -5891,6 +6078,7 @@
 
         newTab = true;
       }
@@ -694,7 +689,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       aTab._endRemoveArgs = [closeWindow, newTab];
 
       // swapBrowsersAndCloseOther will take care of closing the window without animation.
-@@ -5931,13 +6124,7 @@
+@@ -5931,13 +6119,7 @@
       aTab._mouseleave();
 
       if (newTab) {
@@ -709,7 +704,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       } else {
         TabBarVisibility.update();
       }
-@@ -6070,6 +6257,7 @@
+@@ -6070,6 +6252,7 @@
         this.tabs[i]._tPos = i;
       }
 
@@ -717,7 +712,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       if (!this._windowIsClosing) {
         // update tab close buttons state
         this.tabContainer._updateCloseButtons();
-@@ -6255,6 +6443,7 @@
+@@ -6255,6 +6438,7 @@
         memory_after: await getTotalMemoryUsage(),
         time_to_unload_in_ms: timeElapsed,
       });
@@ -725,7 +720,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
     }
 
     /**
-@@ -6300,6 +6489,7 @@
+@@ -6300,6 +6484,7 @@
       }
 
       let excludeTabs = new Set(aExcludeTabs);
@@ -733,7 +728,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
 
       // If this tab has a successor, it should be selectable, since
       // hiding or closing a tab removes that tab as a successor.
-@@ -6312,15 +6502,22 @@
+@@ -6312,15 +6497,22 @@
         !excludeTabs.has(aTab.owner) &&
         Services.prefs.getBoolPref("browser.tabs.selectOwnerOnClose")
       ) {
@@ -758,7 +753,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       let tab = this.tabContainer.findNextTab(aTab, {
         direction: 1,
         filter: _tab => remainingTabs.includes(_tab),
-@@ -6334,7 +6531,7 @@
+@@ -6334,7 +6526,7 @@
       }
 
       if (tab) {
@@ -767,7 +762,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       }
 
       // If no qualifying visible tab was found, see if there is a tab in
-@@ -6355,7 +6552,7 @@
+@@ -6355,7 +6547,7 @@
         });
       }
 
@@ -776,7 +771,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
     }
 
     _blurTab(aTab) {
-@@ -6366,7 +6563,7 @@
+@@ -6366,7 +6558,7 @@
      * @returns {boolean}
      *   False if swapping isn't permitted, true otherwise.
      */
@@ -785,7 +780,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       // Do not allow transfering a private tab to a non-private window
       // and vice versa.
       if (
-@@ -6420,6 +6617,7 @@
+@@ -6420,6 +6612,7 @@
       // fire the beforeunload event in the process.  Close the other
       // window if this was its last tab.
       if (
@@ -793,7 +788,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
         !remoteBrowser._beginRemoveTab(aOtherTab, {
           adoptedByTab: aOurTab,
           closeWindowWithLastTab: true,
-@@ -6431,7 +6629,7 @@
+@@ -6431,7 +6624,7 @@
       // If this is the last tab of the window, hide the window
       // immediately without animation before the docshell swap, to avoid
       // about:blank being painted.
@@ -802,7 +797,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       if (closeWindow) {
         let win = aOtherTab.documentGlobal;
         win.windowUtils.suppressAnimation(true);
-@@ -6565,11 +6763,13 @@
+@@ -6565,11 +6758,13 @@
       }
 
       // Finish tearing down the tab that's going away.
@@ -816,7 +811,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
 
       this.setTabTitle(aOurTab);
 
-@@ -6771,10 +6971,10 @@
+@@ -6771,10 +6966,10 @@
       SessionStore.deleteCustomTabValue(aTab, "hiddenBy");
     }
 
@@ -829,7 +824,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
         aTab.selected ||
         aTab.closing ||
         // Tabs that are sharing the screen, microphone or camera cannot be hidden.
-@@ -6834,7 +7034,8 @@
+@@ -6834,7 +7029,8 @@
      * @param {object} [aOptions={}]
      *   Key-value pairs that will be serialized into the features string.
      */
@@ -839,7 +834,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       if (this.tabs.length == 1) {
         return null;
       }
-@@ -6851,7 +7052,7 @@
+@@ -6851,7 +7047,7 @@
       // tell a new window to take the "dropped" tab
       let args = Cc["@mozilla.org/array;1"].createInstance(Ci.nsIMutableArray);
       args.appendElement(aTab.splitview ?? aTab);
@@ -848,7 +843,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
         private: PrivateBrowsingUtils.isWindowPrivate(window),
         features: Object.entries(aOptions)
           .map(([key, value]) => `${key}=${value}`)
-@@ -6859,6 +7060,8 @@
+@@ -6859,6 +7055,8 @@
         openerWindow: window,
         args,
       });
@@ -857,7 +852,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
     }
 
     /**
-@@ -6971,7 +7174,7 @@
+@@ -6971,7 +7169,7 @@
      *   `true` if element is a `<tab-group>`
      */
     isTabGroup(element) {
@@ -866,7 +861,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
     }
 
     /**
-@@ -7056,8 +7259,8 @@
+@@ -7056,8 +7254,8 @@
       }
 
       // Don't allow mixing pinned and unpinned tabs.
@@ -877,7 +872,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       } else {
         tabIndex = Math.max(tabIndex, this.pinnedTabCount);
       }
-@@ -7103,8 +7306,8 @@
+@@ -7103,8 +7301,8 @@
       this.#handleTabMove(
         element,
         () => {
@@ -888,7 +883,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
             neighbor = neighbor.group;
           }
           if (neighbor?.splitview) {
-@@ -7115,6 +7318,12 @@
+@@ -7115,6 +7313,12 @@
               return;
             }
           }
@@ -901,7 +896,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
 
           if (movingForwards && neighbor) {
             neighbor.after(element);
-@@ -7173,23 +7382,31 @@
+@@ -7173,23 +7377,31 @@
     #moveTabNextTo(element, targetElement, moveBefore = false, metricsContext) {
       if (this.isTabGroupLabel(targetElement)) {
         targetElement = targetElement.group;
@@ -939,7 +934,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       } else if (!element.pinned && targetElement && targetElement.pinned) {
         // If the caller asks to move an unpinned element next to a pinned
         // tab, move the unpinned element to be the first unpinned element
-@@ -7202,12 +7419,35 @@
+@@ -7202,12 +7414,35 @@
         //    move the tab group right before the first unpinned tab.
         // 4. Moving a tab group and the first unpinned tab is grouped:
         //    move the tab group right before the first unpinned tab's tab group.
@@ -976,7 +971,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
 
       // We want to include the splitview wrapper if it's the targetElement, but
       // not in the case where we want to reverse tabs within the same splitview.
-@@ -7216,6 +7456,7 @@
+@@ -7216,6 +7451,7 @@
       }
 
       let getContainer = () =>
@@ -984,7 +979,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
         element.pinned
           ? this.tabContainer.pinnedTabsContainer
           : this.tabContainer;
-@@ -7224,11 +7465,15 @@
+@@ -7224,11 +7460,15 @@
         element,
         () => {
           if (moveBefore) {
@@ -1001,7 +996,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
           }
         },
         metricsContext
-@@ -7302,11 +7547,15 @@
+@@ -7302,11 +7542,15 @@
      * @param {TabMetricsContext} [metricsContext]
      */
     moveTabToExistingGroup(aTab, aGroup, metricsContext) {
@@ -1020,7 +1015,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       }
       if (aTab.group && aTab.group.id === aGroup.id) {
         return;
-@@ -7378,6 +7627,7 @@
+@@ -7378,6 +7622,7 @@
 
       let state = {
         tabIndex: tab._tPos,
@@ -1028,7 +1023,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       };
       if (tab.visible) {
         state.elementIndex = tab.elementIndex;
-@@ -7409,7 +7659,7 @@
+@@ -7409,7 +7654,7 @@
       let changedSplitView =
         previousTabState.splitViewId != currentTabState.splitViewId;
 
@@ -1037,7 +1032,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
         tab.dispatchEvent(
           new CustomEvent("TabMove", {
             bubbles: true,
-@@ -7456,6 +7706,10 @@
+@@ -7456,6 +7701,10 @@
 
       moveActionCallback();
 
@@ -1048,7 +1043,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       // Clear tabs cache after moving nodes because the order of tabs may have
       // changed.
       this.tabContainer._invalidateCachedTabs();
-@@ -7506,7 +7760,22 @@
+@@ -7506,7 +7755,22 @@
      * @returns {object}
      *    The new tab in the current window, null if the tab couldn't be adopted.
      */
@@ -1072,7 +1067,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       // Swap the dropped tab with a new one we create and then close
       // it in the other window (making it seem to have moved between
       // windows). We also ensure that the tab we create to swap into has
-@@ -7549,6 +7818,8 @@
+@@ -7549,6 +7813,8 @@
       }
       params.skipLoad = true;
       let newTab = this.addWebTab("about:blank", params);
@@ -1081,7 +1076,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
 
       aTab.container.tabDragAndDrop.finishAnimateTabMove();
 
-@@ -8259,7 +8530,7 @@
+@@ -8259,7 +8525,7 @@
         // preventDefault(). It will still raise the window if appropriate.
         return;
       }
@@ -1090,7 +1085,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       window.focus();
       aEvent.preventDefault();
     }
-@@ -8276,7 +8547,6 @@
+@@ -8276,7 +8542,6 @@
 
     on_TabGroupCollapse(aEvent) {
       aEvent.target.tabs.forEach(tab => {
@@ -1098,7 +1093,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
       });
     }
 
-@@ -8630,7 +8900,9 @@
+@@ -8630,7 +8895,9 @@
 
         let filter = this._tabFilters.get(tab);
         if (filter) {
@@ -1108,7 +1103,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
 
           let listener = this._tabListeners.get(tab);
           if (listener) {
-@@ -9435,6 +9707,7 @@
+@@ -9435,6 +9702,7 @@
             aWebProgress.isTopLevel
           ) {
             this.mTab.setAttribute("busy", "true");
@@ -1116,7 +1111,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
             gBrowser._tabAttrModified(this.mTab, ["busy"]);
             this.mTab._notselectedsinceload = !this.mTab.selected;
           }
-@@ -9515,6 +9788,7 @@
+@@ -9515,6 +9783,7 @@
         // known defaults. Note we use the original URL since about:newtab
         // redirects to a prerendered page.
         const shouldRemoveFavicon =
@@ -1124,7 +1119,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
           !this.mBrowser.mIconURL &&
           !ignoreBlank &&
           !(originalLocation.spec in FAVICON_DEFAULTS);
-@@ -9689,13 +9963,6 @@
+@@ -9689,13 +9958,6 @@
             this.mBrowser.originalURI = aRequest.originalURI;
           }
 
@@ -1138,7 +1133,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..555ffd4772d9d4903491fdff9f368285
         }
 
         let userContextId = this.mBrowser.getAttribute("usercontextid") || 0;
-@@ -10587,7 +10854,8 @@ var TabContextMenu = {
+@@ -10587,7 +10849,8 @@ var TabContextMenu = {
     );
     contextUnpinSelectedTabs.hidden =
       !this.contextTab.pinned || !this.multiselected;
--- a/src/browser/components/tabbrowser/content/tabs-js.patch
+++ b/src/browser/components/tabbrowser/content/tabs-js.patch
@@ -1,8 +1,23 @@
 diff --git a/browser/components/tabbrowser/content/tabs.js b/browser/components/tabbrowser/content/tabs.js
-index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9ea21b6f6 100644
+index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..b9a1cfe3a4a5035d9b06b0b3826a97c52cfcb39e 100644
 --- a/browser/components/tabbrowser/content/tabs.js
 +++ b/browser/components/tabbrowser/content/tabs.js
-@@ -220,7 +220,7 @@
+@@ -197,8 +197,12 @@
+       XPCOMUtils.defineLazyPreferenceGetter(
+         this,
+         "_sidebarPositionStart",
+-        "sidebar.position_start",
+-        true
+        "zen.tabs.vertical.right-side",
+        true,
+        null,
+        newValue => {
+          return !newValue;
+        }
+       );
+ 
+       if (gMultiProcessBrowser) {
+@@ -220,7 +224,7 @@
 
       this.tooltip = "tabbrowser-tab-tooltip";
 
@@ -11,7 +26,7 @@ index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9
       this.tabDragAndDrop.init();
     }
 
-@@ -444,7 +444,7 @@
+@@ -444,7 +448,7 @@
       // and we're not hitting the scroll buttons.
       if (
         event.button != 0 ||
@@ -20,7 +35,7 @@ index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9
         event.composedTarget.localName == "toolbarbutton"
       ) {
         return;
-@@ -525,7 +525,6 @@
+@@ -525,7 +529,6 @@
             });
           }
         } else if (isTabGroupLabel(event.target)) {
@@ -28,7 +43,7 @@ index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9
         } else if (
           event.originalTarget.closest("scrollbox") &&
           !Services.prefs.getBoolPref(
-@@ -561,6 +560,9 @@
+@@ -561,6 +564,9 @@
     }
 
     on_keydown(event) {
@@ -38,7 +53,7 @@ index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9
       let { altKey, shiftKey } = event;
       let [accel, nonAccel] =
         AppConstants.platform == "macosx"
-@@ -755,7 +757,6 @@
+@@ -755,7 +761,6 @@
       this._updateCloseButtons();
 
       if (!this.#animatingGroups.size) {
@@ -46,7 +61,7 @@ index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9
       }
 
       document
-@@ -822,7 +823,7 @@
+@@ -822,7 +827,7 @@
     }
 
     get newTabButton() {
@@ -55,7 +70,7 @@ index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9
     }
 
     get verticalMode() {
-@@ -838,6 +839,7 @@
+@@ -838,6 +843,7 @@
     }
 
     get overflowing() {
@@ -63,7 +78,7 @@ index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9
       return this.hasAttribute("overflow");
     }
 
-@@ -851,29 +853,56 @@
+@@ -851,29 +857,56 @@
       if (pinnedChildren?.at(-1)?.id == "pinned-tabs-container-periphery") {
         pinnedChildren.pop();
       }
@@ -93,7 +108,7 @@ index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9
 +          } else if (!isTab(tab)) {
 +            tabs.splice(i, 1);
 +          }
-         }
+        }
 +      };
 +      expandTabs(pinnedTabs);
 +      expandTabs(unpinnedChildren);
@@ -114,7 +129,7 @@ index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9
 +          // remove the separator from the list
 +          allTabs.splice(i, 1);
 +          i--;
-+        }
+         }
 +        i++;
       }
 -
@@ -130,7 +145,7 @@ index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9
     }
 
     get allSplitViews() {
-@@ -958,29 +987,28 @@
+@@ -958,29 +991,28 @@
         return this.#focusableItems;
       }
 
@@ -170,7 +185,7 @@ index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9
       this.#focusableItems = focusableItems;
 
       return this.#focusableItems;
-@@ -993,6 +1021,7 @@
+@@ -993,6 +1025,7 @@
      * focusable (ex, we don't want the splitview container to be focusable, only its children).
      */
     get dragAndDropElements() {
@@ -178,7 +193,7 @@ index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9
       if (this.#dragAndDropElements) {
         return this.#dragAndDropElements;
       }
-@@ -1063,6 +1092,7 @@
+@@ -1063,6 +1096,7 @@
     _invalidateCachedTabs() {
       this.#allTabs = null;
       this._invalidateCachedVisibleTabs();
@@ -186,7 +201,7 @@ index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9
     }
 
     _invalidateCachedVisibleTabs() {
-@@ -1082,7 +1112,8 @@
+@@ -1082,7 +1116,8 @@
 
     isContainerVerticalPinnedGrid(tab) {
       return (
@@ -196,7 +211,7 @@ index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9
         this.verticalMode &&
         this.hasAttribute("expanded") &&
         !this.expandOnHover
-@@ -1176,7 +1207,7 @@
+@@ -1176,7 +1211,7 @@
 
       if (node == null) {
         // We have a container for non-tab elements at the end of the scrollbox.
@@ -205,7 +220,7 @@ index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9
       }
 
       node.before(tab);
-@@ -1271,7 +1302,7 @@
+@@ -1271,7 +1306,7 @@
           // There are separate "new tab" buttons for horizontal tabs toolbar, vertical tabs and
           // for when the tab strip is overflowed (which is shared by vertical and horizontal tabs);
           // Attach the long click popup to all of them.
@@ -214,7 +229,7 @@ index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9
           const newTab2 = this.newTabButton;
           const newTabVertical = document.getElementById(
             "vertical-tabs-newtab-button"
-@@ -1376,8 +1407,10 @@
+@@ -1376,8 +1411,10 @@
      */
     _handleTabSelect(aInstant) {
       let selectedTab = this.selectedItem;
@@ -225,7 +240,7 @@ index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9
       selectedTab._notselectedsinceload = false;
     }
 
-@@ -1386,7 +1419,7 @@
+@@ -1386,7 +1423,7 @@
      * @param {boolean} [shouldScrollInstantly=false]
      */
     #ensureTabIsVisible(tab, shouldScrollInstantly = false) {
@@ -234,7 +249,7 @@ index 568f3a7cc7051ff8cb569f6bcb8018a5212f7072..3036768b8911b4fbc28df7528f7189d9
       if (arrowScrollbox?.overflowing) {
         arrowScrollbox.ensureElementIsVisible(tab, shouldScrollInstantly);
       }
-@@ -1513,7 +1546,7 @@
+@@ -1513,7 +1550,7 @@
     }
 
     _notifyBackgroundTab(aTab) {
--- a/src/zen/common/emojis/ZenEmojiPicker.mjs
+++ b/src/zen/common/emojis/ZenEmojiPicker.mjs
@@ -6,29 +6,29 @@ import { nsZenDOMOperatedFeature } from "chrome://browser/content/zen-components

 // prettier-ignore
 const SVG_ICONS = [
-    "airplane.svg", "american-football.svg", "baseball.svg", "basket.svg", 
-    "bed.svg", "bell.svg", "bookmark.svg", "book.svg", 
-    "briefcase.svg", "brush.svg", "bug.svg", "build.svg", 
-    "cafe.svg", "call.svg", "card.svg", "chat.svg", 
-    "checkbox.svg", "circle.svg", "cloud.svg", "code.svg", 
-    "coins.svg", "construct.svg", "cutlery.svg", "egg.svg", 
-    "extension-puzzle.svg", "eye.svg", "fast-food.svg", "fish.svg", 
-    "flag.svg", "flame.svg", "flask.svg", "folder.svg", 
-    "game-controller.svg", "globe-1.svg", "globe.svg", "grid-2x2.svg", 
-    "grid-3x3.svg", "heart.svg", "ice-cream.svg", "image.svg", 
-    "inbox.svg", "key.svg", "layers.svg", "leaf.svg", 
-    "lightning.svg", "location.svg", "lock-closed.svg", "logo-rss.svg", 
-    "logo-usd.svg", "mail.svg", "map.svg", "megaphone.svg", 
-    "moon.svg", "music.svg", "navigate.svg", "nuclear.svg", 
-    "page.svg", "palette.svg", "paw.svg", "people.svg", 
-    "pizza.svg", "planet.svg", "present.svg", "rocket.svg", 
-    "school.svg", "shapes.svg", "shirt.svg", "skull.svg", 
-    "squares.svg", "square.svg", "star-1.svg", "star.svg", 
-    "stats-chart.svg", "sun.svg", "tada.svg", "terminal.svg", 
-    "ticket.svg", "time.svg", "trash.svg", "triangle.svg", 
-    "video.svg", "volume-high.svg", "wallet.svg", "warning.svg", 
-    "water.svg", "weight.svg", 
-  ];
+  "airplane.svg", "american-football.svg", "baseball.svg", "basket.svg",
+  "bed.svg", "bell.svg", "bookmark.svg", "book.svg",
+  "briefcase.svg", "brush.svg", "bug.svg", "build.svg",
+  "cafe.svg", "call.svg", "card.svg", "chat.svg",
+  "checkbox.svg", "circle.svg", "cloud.svg", "code.svg",
+  "coins.svg", "construct.svg", "cutlery.svg", "egg.svg",
+  "extension-puzzle.svg", "eye.svg", "fast-food.svg", "fish.svg",
+  "flag.svg", "flame.svg", "flask.svg", "folder.svg",
+  "game-controller.svg", "globe-1.svg", "globe.svg", "grid-2x2.svg",
+  "grid-3x3.svg", "heart.svg", "ice-cream.svg", "image.svg",
+  "inbox.svg", "key.svg", "layers.svg", "leaf.svg",
+  "lightning.svg", "location.svg", "lock-closed.svg", "logo-rss.svg",
+  "logo-usd.svg", "mail.svg", "map.svg", "megaphone.svg",
+  "moon.svg", "music.svg", "navigate.svg", "nuclear.svg",
+  "page.svg", "palette.svg", "paw.svg", "people.svg",
+  "pizza.svg", "planet.svg", "present.svg", "rocket.svg",
+  "school.svg", "shapes.svg", "shirt.svg", "skull.svg",
+  "squares.svg", "square.svg", "star-1.svg", "star.svg",
+  "stats-chart.svg", "sun.svg", "tada.svg", "terminal.svg",
+  "ticket.svg", "time.svg", "trash.svg", "triangle.svg",
+  "video.svg", "volume-high.svg", "wallet.svg", "warning.svg",
+  "water.svg", "weight.svg",
+];

 class nsZenEmojiPicker extends nsZenDOMOperatedFeature {
  #panel;
@@ -47,6 +47,7 @@ class nsZenEmojiPicker extends nsZenDOMOperatedFeature {
  init() {
    this.#panel = document.getElementById("PanelUI-zen-emojis-picker");
    this.#panel.addEventListener("popupshowing", this);
+    this.#panel.addEventListener("popupshown", this);
    this.#panel.addEventListener("popuphidden", this);
    this.#panel.addEventListener("command", this);
    this.searchInput.addEventListener("input", this);
@@ -57,6 +58,9 @@ class nsZenEmojiPicker extends nsZenDOMOperatedFeature {
      case "popupshowing":
        this.#onPopupShowing(event);
        break;
+      case "popupshown":
+        this.#onPopupShown(event);
+        break;
      case "popuphidden":
        this.#onPopupHidden(event);
        break;
@@ -103,17 +107,20 @@ class nsZenEmojiPicker extends nsZenDOMOperatedFeature {
    return document.getElementById("PanelUI-zen-emojis-picker-search");
  }

-  #changePage(toSvg = false) {
+  #changePage(toSvg = false, { animate = true } = {}) {
+    const pages = document.getElementById("PanelUI-zen-emojis-picker-pages");
    const itemToScroll = toSvg
      ? this.svgList
-      : document
-          .getElementById("PanelUI-zen-emojis-picker-pages")
-          .querySelector('[emojis="true"]');
-    itemToScroll.scrollIntoView({
-      behavior: "smooth",
-      block: "nearest",
-      inline: "start",
-    });
+      : pages.querySelector('[emojis="true"]');
+    if (animate) {
+      itemToScroll.scrollIntoView({
+        behavior: "smooth",
+        block: "nearest",
+        inline: "start",
+      });
+    } else {
+      pages.scrollLeft = toSvg ? itemToScroll.offsetLeft : 0;
+    }
    const button = document.getElementById(
      `PanelUI-zen-emojis-picker-change-${toSvg ? "svg" : "emojis"}`
    );
@@ -180,9 +187,6 @@ class nsZenEmojiPicker extends nsZenDOMOperatedFeature {
        });
        emojiList.appendChild(item);
      }
-      setTimeout(() => {
-        this.searchInput.focus();
-      }, 500);
    }
    const svgList = this.svgList;
    for (const icon of SVG_ICONS) {
@@ -199,14 +203,23 @@ class nsZenEmojiPicker extends nsZenDOMOperatedFeature {
    }
  }

+  #onPopupShown(event) {
+    if (event.target !== this.#panel) {
+      return;
+    }
+    const allowEmojis = !this.#panel.hasAttribute("only-svg-icons");
+    if (allowEmojis) {
+      this.searchInput.focus({ preventScroll: true });
+    }
+    this.#changePage(false, { animate: false });
+  }
+
  #onPopupHidden(event) {
    if (event.target !== this.#panel) {
      return;
    }
    this.#clearEmojis();

-    this.#changePage(false);
-
    const emojiList = this.emojiList;
    emojiList.innerHTML = "";

--- a/src/zen/drag-and-drop/ZenDragAndDrop.js
+++ b/src/zen/drag-and-drop/ZenDragAndDrop.js
@@ -723,8 +723,11 @@
      const { isNearLeftEdge, isNearRightEdge } =
        this.#shouldSwitchSpace(event);
      if (isNearLeftEdge || isNearRightEdge) {
-        if (!this.#changeSpaceTimer) {
+        if (!this.#changeSpaceTimer && !this.#isOutOfWindow) {
          this.#changeSpaceTimer = setTimeout(() => {
+            if (this.#isOutOfWindow) {
+              return;
+            }
            this.clearDragOverVisuals();
            gZenWorkspaces
              .changeWorkspaceShortcut(
@@ -956,8 +959,10 @@
      if (ownerGlobal?.gZenCompactModeManager) {
        // Sometimes, dragend doesn't always get called when dragging
        // to different windows, see gh-8643.
-        delete ownerGlobal.gZenCompactModeManager._isTabBeingDragged;
-        ownerGlobal.gZenCompactModeManager._clearAllHoverStates();
+        requestAnimationFrame(() => {
+          delete ownerGlobal.gZenCompactModeManager._isTabBeingDragged;
+          ownerGlobal.gZenCompactModeManager._clearAllHoverStates();
+        });
      }
      this.clearSpaceSwitchTimer();
      gZenFolders.highlightGroupOnDragOver(null);
--- a/src/zen/glance/ZenGlanceManager.mjs
+++ b/src/zen/glance/ZenGlanceManager.mjs
@@ -53,6 +53,10 @@ class nsZenGlanceManager extends nsZenDOMOperatedFeature {
  #setupEventListeners() {
    window.addEventListener("TabClose", this.onTabClose.bind(this));
    window.addEventListener("TabSelect", this.onLocationChange.bind(this));
+    window.addEventListener(
+      "MozDOMFullscreen:Entered",
+      this.onFullscreenEntered.bind(this)
+    );

    document
      .getElementById("tabbrowser-tabpanels")
@@ -1414,6 +1418,23 @@ class nsZenGlanceManager extends nsZenDOMOperatedFeature {
    }
  }

+  /**
+   * Handle DOM Fullscreen request while inside glance
+   *
+   * @param {Event} event - The MozDOMFullscreen:Entered event
+   */
+  onFullscreenEntered(event) {
+    const browser = this.#currentBrowser;
+
+    if (!browser) {
+      return;
+    }
+
+    if (event.target === browser) {
+      this.fullyOpenGlance();
+    }
+  }
+
  /**
   * Manage tab close for glance tabs
   *
--- a/src/zen/space-routing/ZenSpaceRoutingManager.sys.mjs
+++ b/src/zen/space-routing/ZenSpaceRoutingManager.sys.mjs
@@ -3,6 +3,16 @@
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

 import { JSONFile } from "resource://gre/modules/JSONFile.sys.mjs";
+import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
+
+const lazy = {};
+
+XPCOMUtils.defineLazyPreferenceGetter(
+  lazy,
+  "shouldForceContainerTabsToWorkspace",
+  "zen.workspaces.force-container-workspace",
+  false
+);

 class nsZenSpaceRoutingManager {
  #file = null;
@@ -62,6 +72,37 @@ class nsZenSpaceRoutingManager {
      }
    }

+    if (!isRouteFound) {
+      let tabSpaceId = options.zenWorkspaceId;
+      let spaceManager = win.gZenWorkspaces;
+      if (lazy.shouldForceContainerTabsToWorkspace) {
+        // In case its undefined, to make it into an integer.
+        const tabContainerId = options.userContextId || 0;
+        const currentSpace = spaceManager.getActiveWorkspaceFromCache();
+          console.log("[ZenSpaceRouting] Tab is opening with userContextId", tabContainerId, "and active space has containerTabId", currentSpace.containerTabId);
+        if (tabContainerId !== currentSpace.containerTabId) {
+          const targetWorkspace = spaceManager.getWorkspaces().find(
+            workspace => workspace.containerTabId === tabContainerId
+          );
+          if (targetWorkspace) {
+            tabSpaceId = targetWorkspace.uuid;
+          }
+        }
+      }
+      // Add support for zen.workspaces.force-container-workspace in SR,
+      // instead of using the old implementation. Lets create a temporary route
+      // for this tab, so that it will be routed to the correct space.
+      if (tabSpaceId && tabSpaceId !== spaceManager.activeWorkspace) {
+        const targetWorkspace = spaceManager.getWorkspaceFromId(tabSpaceId);
+        if (targetWorkspace) {
+          userContextId = targetWorkspace.containerTabId;
+          isRouteFound = true;
+          targetWorkspaceName = targetWorkspace.name;
+          targetRoute = tabSpaceId;
+        }
+      }
+    }
+
    return {
      shouldEarlyExit: false,
      userContextId,
@@ -167,8 +208,8 @@ class nsZenSpaceRoutingManager {
          break;

        default: {
-          const workspaces = win?.gZenWorkspaces;
-          const targetWorkspace = workspaces?.getWorkspaceFromId?.(targetRoute);
+          const workspaces = win.gZenWorkspaces;
+          const targetWorkspace = workspaces.getWorkspaceFromId(targetRoute);

          if (targetWorkspace) {
            workspaces.moveTabToWorkspace(newTab, targetWorkspace.uuid);
--- a/src/zen/spaces/ZenSpaceManager.mjs
+++ b/src/zen/spaces/ZenSpaceManager.mjs
@@ -106,12 +106,6 @@ class nsZenWorkspaces {
      "zen.workspaces.wrap-around-navigation",
      true
    );
-    XPCOMUtils.defineLazyPreferenceGetter(
-      this,
-      "shouldForceContainerTabsToWorkspace",
-      "zen.workspaces.force-container-workspace",
-      true
-    );
    XPCOMUtils.defineLazyPreferenceGetter(
      this,
      "shouldOpenNewTabIfLastUnpinnedTabIsClosed",
@@ -788,11 +782,6 @@ class nsZenWorkspaces {
      window.addEventListener("TabUnpinned", tabUpdateListener);
      window.addEventListener("aftercustomization", tabUpdateListener);
      window.addEventListener("TabSelect", this.onLocationChange.bind(this));
-      window.addEventListener(
-        "TabBrowserInserted",
-        this.onTabBrowserInserted.bind(this)
-      );
-
      this.updateWorkspacesChangeContextMenu();
    })();
  }
@@ -1506,19 +1495,27 @@ class nsZenWorkspaces {
        continue;
      }

+      const newtabPlacement = Services.prefs.getBoolPref(
+        "zen.view.show-newtab-button-top",
+        false
+      );
+      const insertElement = newtabPlacement
+        ? container.firstChild
+        : container.lastChild;
+
      if (container) {
        if (tab.group?.hasAttribute("split-view-group")) {
          gBrowser.zenHandleTabMove(tab.group, () => {
            for (const subTab of tab.group.tabs) {
              subTab.setAttribute("zen-workspace-id", workspaceID);
            }
-            container.insertBefore(tab.group, container.lastChild);
+            container.insertBefore(tab.group, insertElement);
          });
          continue;
        }
        gBrowser.zenHandleTabMove(tab, () => {
          tab.setAttribute("zen-workspace-id", workspaceID);
-          container.insertBefore(tab, container.lastChild);
+          container.insertBefore(tab, insertElement);
        });
      }
      // also change glance tab if it's the same tab
@@ -2786,44 +2783,6 @@ class nsZenWorkspaces {
    }
  }

-  async onTabBrowserInserted(event) {
-    let tab = event.originalTarget;
-    const isEssential = tab.getAttribute("zen-essential") === "true";
-    const workspaceID = tab.getAttribute("zen-workspace-id");
-
-    if (!this.workspaceEnabled || isEssential) {
-      return;
-    }
-
-    if (workspaceID) {
-      if (
-        tab.hasAttribute("change-workspace") &&
-        this.moveTabToWorkspace(tab, workspaceID)
-      ) {
-        this.lastSelectedWorkspaceTabs[workspaceID] =
-          gZenGlanceManager.getTabOrGlanceParent(tab);
-        tab.removeAttribute("change-workspace");
-        const workspace = this.getWorkspaceFromId(workspaceID);
-        setTimeout(() => {
-          this.changeWorkspace(workspace);
-        }, 0);
-      }
-      return;
-    }
-
-    let activeWorkspace = this.getActiveWorkspace();
-    if (!activeWorkspace) {
-      return;
-    }
-    if (tab.hasAttribute("zen-workspace-id")) {
-      const tabWorkspaceId = tab.getAttribute("zen-workspace-id");
-      this.moveTabToWorkspace(tab, tabWorkspaceId);
-      await this.changeWorkspaceWithID(tabWorkspaceId);
-    } else {
-      tab.setAttribute("zen-workspace-id", activeWorkspace.uuid);
-    }
-  }
-
  #changeToEmptyTab() {
    const isEmpty = gBrowser.selectedTab.hasAttribute("zen-empty-tab");
    gZenCompactModeManager.sidebar.toggleAttribute(
@@ -3009,7 +2968,7 @@ class nsZenWorkspaces {

  getContextIdIfNeeded(userContextId, fromExternal, triggeringPrincipal) {
    if (!this.workspaceEnabled) {
-      return [userContextId, false, undefined];
+      return [userContextId, false];
    }

    if (
@@ -3017,27 +2976,7 @@ class nsZenWorkspaces {
      triggeringPrincipal.isAddonOrExpandedAddonPrincipal &&
      typeof userContextId === "undefined"
    ) {
-      return [userContextId, false, undefined];
-    }
-
-    if (
-      this.shouldForceContainerTabsToWorkspace &&
-      typeof userContextId !== "undefined" &&
-      this._workspaceCache &&
-      !fromExternal
-    ) {
-      // Find all workspaces that match the given userContextId
-      const matchingWorkspaces = this._workspaceCache.filter(
-        workspace => workspace.containerTabId === userContextId
-      );
-
-      // Check if exactly one workspace matches
-      if (matchingWorkspaces.length === 1) {
-        const workspace = matchingWorkspaces[0];
-        if (workspace.uuid !== this.getActiveWorkspaceFromCache().uuid) {
-          return [userContextId, true, workspace.uuid];
-        }
-      }
+      return [userContextId, false];
    }

    const activeWorkspace = this.getActiveWorkspaceFromCache();
@@ -3048,9 +2987,9 @@ class nsZenWorkspaces {
      typeof userContextId !== "undefined" &&
      userContextId !== activeWorkspaceUserContextId
    ) {
-      return [userContextId, false, undefined];
+      return [userContextId, false];
    }
-    return [activeWorkspaceUserContextId, true, undefined];
+    return [activeWorkspaceUserContextId, true];
  }

  getTabsToExclude(aTab) {
--- a/surfer.json
+++ b/surfer.json
@@ -5,8 +5,8 @@
  "binaryName": "zen",
  "version": {
    "product": "firefox",
-    "version": "152.0",
-    "candidate": "152.0",
+    "version": "152.0.1",
+    "candidate": "152.0.1",
    "candidateBuild": 1
  },
  "buildOptions": {
@@ -20,7 +20,7 @@
      "brandShortName": "Zen",
      "brandFullName": "Zen Browser",
      "release": {
-        "displayVersion": "1.21.2b",
+        "displayVersion": "1.21.3b",
        "github": {
          "repo": "zen-browser/desktop"
        },
Author	SHA1	Message	Date
mr. m	0541ac2ad0	closes #14331 : Refactor SR to support container tab forcing	2026-06-22 12:13:52 +02:00
Bernhard	183c583841	gh-14320: fix workspace change icon picker state when opening (gh-14321) The picker reset its page with a smooth scrollIntoView while the popup was hiding, and positioned the page before the popup was laid out, so it could animate/jump on open. Reset instantly on popupshown (after layout) instead, and drop the on-hide scroll so there's no visible animation.	2026-06-21 21:43:44 +02:00
fen4flo	40080a25dc	gh-11245: Fix tab placement with Move Tab / Space Routing (gh-14324) Fixes #11245	2026-06-21 15:18:02 +02:00
Connor Griffin	733061fbe3	gh-11766: Fixed video fullscreen not working while in glance (gh-14272) Co-authored-by: mr. m <91018726+mr-cheffy@users.noreply.github.com> Signed-off-by: mr. m <91018726+mr-cheffy@users.noreply.github.com>	2026-06-21 11:20:37 +02:00
Andrey Bochkarev	61e631902c	gh-14131: Prevent sidebar from flickering when moving a tab (gh-14293) Co-authored-by: mr. m <mr.m@tuta.com>	2026-06-20 17:18:41 +02:00
mr. m	0cd67f882a	gh-14266: Sync upstream Firefox to version `152.0.1` (gh-14265) Signed-off-by: mr. m <91018726+mr-cheffy@users.noreply.github.com>	2026-06-18 10:36:03 +02:00
mr. m	bc6e4676f4	gh-14208: Set default prefs category to tabs&browsing (gh-14264)	2026-06-18 09:15:50 +02:00
mr. m	e331f07265	gh-14259: Fixed transparency not working after update (gh-14262)	2026-06-18 09:04:09 +02:00