gh-14431: Fixed pinned tabs broken on latest twilight (gh-14446)

This PR syncs the upstream Firefox to version 152.0.4.

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 `152.0.3`! 🚀
-- [`Twilight`](https://zen-browser.app/download?twilight) - Is currently built using Firefox version `RC 152.0.3`!
+- [`Release`](https://zen-browser.app/download) - Is currently built using Firefox version `152.0.4`! 🚀
+- [`Twilight`](https://zen-browser.app/download?twilight) - Is currently built using Firefox version `RC 152.0.4`!
 
 ### Contributing
 

build/firefox-cache/l10n-last-commit-hash

@@ -1 +1 @@
-b223f3727a037a7b8a0f36f34bfe8c4622a7f387
+3985a970489e32fc751e1b80abf4d5534c905e45

locales/en-US/browser/browser/zen-folders.ftl

@@ -6,13 +6,13 @@ zen-folders-search-placeholder =
     .placeholder = Search { $folder-name }...
 
 zen-folders-panel-rename-folder =
-    .label = Rename Folder
+    .label = Rename Folder…
 
 zen-folders-panel-unpack-folder =
     .label = Unpack Folder
 
 zen-folders-new-subfolder =
-    .label = New Subfolder
+    .label = New Subfolder…
 
 zen-folders-panel-delete-folder =
     .label = Delete Folder
@@ -21,7 +21,7 @@ zen-folders-panel-convert-folder-to-space =
     .label = Convert folder to Space
 
 zen-folders-panel-change-folder-space =
-    .label = Change Space...
+    .label = Change Space
 
 zen-folders-unload-all-tooltip =
     .tooltiptext = Unload active in this folder

locales/en-US/browser/browser/zen-general.ftl

@@ -30,12 +30,12 @@ tab-context-zen-replace-pinned-url-with-current =
     .label = Replace with Current URL
     .accesskey = C
 tab-context-zen-edit-pinned-url =
-    .label = Edit...
+    .label = Edit…
     .accesskey = E
 tab-context-zen-edit-title =
-    .label = Change Label...
+    .label = Change Label…
 tab-context-zen-edit-icon =
-    .label = Change Icon...
+    .label = Change Icon…
 
 zen-themes-corrupted = Your { -brand-short-name } mods file is corrupted. They have been reset to the default theme.
 zen-shortcuts-corrupted = Your { -brand-short-name } shortcuts file is corrupted. They have been reset to the default shortcuts.

locales/en-US/browser/browser/zen-vertical-tabs.ftl

@@ -20,7 +20,7 @@ zen-toolbar-context-compact-mode-hide-both =
     .accesskey = H
 
 zen-toolbar-context-move-to-folder =
-    .label = Move to Folder...
+    .label = Move to Folder
     .accesskey = M
 
 zen-toolbar-context-new-folder =
@@ -31,7 +31,7 @@ sidebar-zen-expand =
   .label = Expand Sidebar
 
 sidebar-zen-create-new =
-  .label = Create New...
+  .label = Create New
 
 tabbrowser-unload-tab-button =
 .tooltiptext =

locales/en-US/browser/browser/zen-workspaces.ftl

@@ -24,10 +24,10 @@ zen-workspaces-panel-context-delete =
     .accesskey = D
 
 zen-workspaces-panel-change-name =
-    .label = Change Name
+    .label = Change Name…
 
 zen-workspaces-panel-change-icon =
-    .label = Change Icon
+    .label = Change Icon…
 
 zen-workspaces-panel-context-default-profile =
     .label = Set Profile
@@ -42,7 +42,7 @@ zen-workspaces-how-to-reorder-title = How to reorder spaces
 zen-workspaces-how-to-reorder-desc = Drag the space icons at the bottom of the sidebar to reorder them
 
 zen-workspaces-change-theme =
-    .label = Edit Theme
+    .label = Edit Theme…
 
 zen-workspaces-panel-context-open =
     .label = Open Workspace
@@ -72,7 +72,7 @@ zen-workspace-creation-name =
     .placeholder = Space Name
 
 zen-move-tab-to-workspace-button =
-    .label = Move To...
+    .label = Move To
     .tooltiptext = Move all tabs in this window to a Space
 
 zen-workspaces-panel-context-reorder =

prefs/firefox/ai.yaml

@@ -23,3 +23,6 @@
 
 - name: browser.ml.linkPreview.enabled
   value: false
+
+- name: browser.preferences.aiControls
+  value: false

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

@@ -10,7 +10,7 @@ index 57add34d876fb885275f1147209c6fbeee367a7c..be0ab43b299317c0022a5e719f47a070
        ],
        resizeCallback: async ({ title, frame }) => {
          // Search within main document and highlight matched keyword.
-@@ -437,6 +438,8 @@ const CONFIG_PANES = Object.freeze({
+@@ -437,6 +437,8 @@ const CONFIG_PANES = Object.freeze({
    tabsBrowsing: {
      l10nId: "tabs-browsing-section",
      groupIds: [

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..87f41c8583c26f364530def5bd5d83330c265dfc 100644
+index 08b5b56e069d038d72c87355920c4ce8a55ed805..209c0ddc0297adb8340180c58de07ae107790751 100644
 --- a/browser/components/tabbrowser/content/tabbrowser.js
 +++ b/browser/components/tabbrowser/content/tabbrowser.js
 @@ -511,6 +511,7 @@
@@ -109,7 +109,13 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        tab.linkedPanel = uniqueId;
        this._selectedTab = tab;
        this._selectedBrowser = browser;
-@@ -1131,13 +1192,18 @@
+@@ -1126,18 +1187,24 @@
+       aTab,
+       { telemetrySource = this.TabMetrics.METRIC_SOURCE.UNKNOWN } = {}
+     ) {
++      aTab = gZenGlanceManager.getTabOrGlanceParent(aTab);
+       if (aTab.pinned || aTab == FirefoxViewHandler.tab) {
+         return;
        }
  
        this.showTab(aTab);
@@ -129,7 +135,13 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
  
        aTab.setAttribute("pinned", "true");
        this._updateTabBarForPinnedTabs();
-@@ -1150,11 +1216,19 @@
+@@ -1145,16 +1212,25 @@
+     }
+ 
+     unpinTab(aTab) {
++      aTab = gZenGlanceManager.getTabOrGlanceParent(aTab);
+       if (!aTab.pinned) {
+         return;
        }
  
        this.#handleTabMove(aTab, () => {
@@ -150,7 +162,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        });
  
        aTab.style.marginInlineStart = "";
-@@ -1369,6 +1443,9 @@
+@@ -1369,6 +1445,9 @@
  
        let LOCAL_PROTOCOLS = ["chrome:", "about:", "resource:", "data:"];
  
@@ -160,7 +172,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        if (
          aIconURL &&
          !LOCAL_PROTOCOLS.some(protocol => aIconURL.startsWith(protocol))
-@@ -1378,6 +1455,9 @@
+@@ -1378,6 +1457,9 @@
          );
          return;
        }
@@ -170,7 +182,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
  
        let browser = this.getBrowserForTab(aTab);
        browser.mIconURL = aIconURL;
-@@ -1700,7 +1780,6 @@
+@@ -1700,7 +1782,6 @@
  
        // Preview mode should not reset the owner
        if (!this._previewMode && !oldTab.selected) {
@@ -178,7 +190,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        }
  
        let lastRelatedTab = this._lastRelatedTabMap.get(oldTab);
-@@ -1791,6 +1870,7 @@
+@@ -1791,6 +1872,7 @@
        if (!this._previewMode) {
          newTab.recordTimeFromUnloadToReload();
          newTab.updateLastAccessed();
@@ -186,7 +198,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
          oldTab.updateLastAccessed();
          // if this is the foreground window, update the last-seen timestamps.
          if (this.documentGlobal == BrowserWindowTracker.getTopWindow()) {
-@@ -2005,6 +2085,9 @@
+@@ -2005,6 +2087,9 @@
        }
  
        let activeEl = document.activeElement;
@@ -196,7 +208,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        // If focus is on the old tab, move it to the new tab.
        if (activeEl == oldTab) {
          newTab.focus();
-@@ -2043,7 +2126,7 @@
+@@ -2043,7 +2128,7 @@
        // Focus the location bar if it was previously focused for that tab.
        // In full screen mode, only bother making the location bar visible
        // if the tab is a blank one.
@@ -205,7 +217,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
          let selectURL = () => {
            if (this._asyncTabSwitching) {
              // Set _awaitingSetURI flag to suppress popup notification
-@@ -2331,7 +2414,12 @@
+@@ -2331,7 +2416,12 @@
        return this._setTabLabel(aTab, aLabel);
      }
  
@@ -219,7 +231,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        if (!aLabel || (isURL && /^about:reader\?url=/.test(aLabel))) {
          return false;
        }
-@@ -2457,7 +2545,7 @@
+@@ -2457,7 +2547,7 @@
          newIndex = this.selectedTab._tPos + 1;
        }
  
@@ -228,7 +240,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
          if (this.isTabGroupLabel(targetTab)) {
            throw new Error(
              "Replacing a tab group label with a tab is not supported"
-@@ -2737,6 +2825,7 @@
+@@ -2737,6 +2827,7 @@
        uriIsAboutBlank,
        userContextId,
        skipLoad,
@@ -236,7 +248,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
      } = {}) {
        let b = document.createXULElement("browser");
        // Use the JSM global to create the permanentKey, so that if the
-@@ -2810,8 +2899,7 @@
+@@ -2810,8 +2901,7 @@
          // we use a different attribute name for this?
          b.setAttribute("name", name);
        }
@@ -246,7 +258,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
          b.setAttribute("transparent", "true");
        }
  
-@@ -2981,7 +3069,7 @@
+@@ -2981,7 +3071,7 @@
  
        let panel = this.getPanel(browser);
        let uniqueId = this._generateUniquePanelID();
@@ -255,7 +267,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        aTab.linkedPanel = uniqueId;
  
        // Inject the <browser> into the DOM if necessary.
-@@ -3041,8 +3129,8 @@
+@@ -3041,8 +3131,8 @@
        // If we transitioned from one browser to two browsers, we need to set
        // hasSiblings=false on both the existing browser and the new browser.
        if (this.tabs.length == 2) {
@@ -266,7 +278,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        } else {
          aTab.linkedBrowser.browsingContext.hasSiblings = this.tabs.length > 1;
        }
-@@ -3227,7 +3315,6 @@
+@@ -3227,7 +3317,6 @@
              this.selectedTab = this.addTrustedTab(BROWSER_NEW_TAB_URL, {
                tabIndex: tab._tPos + 1,
                userContextId: tab.userContextId,
@@ -274,7 +286,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
                focusUrlBar: true,
              });
              resolve(this.selectedBrowser);
-@@ -3337,6 +3424,10 @@
+@@ -3337,6 +3426,10 @@
          schemelessInput,
          hasValidUserGestureActivation = false,
          textDirectiveUserActivation = false,
@@ -285,7 +297,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        } = {}
      ) {
        // all callers of addTab that pass a params object need to pass
-@@ -3347,10 +3438,25 @@
+@@ -3347,10 +3440,25 @@
          );
        }
  
@@ -311,7 +323,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        // If we're opening a foreground tab, set the owner by default.
        ownerTab ??= inBackground ? null : this.selectedTab;
  
-@@ -3358,6 +3464,7 @@
+@@ -3358,6 +3466,7 @@
        if (this.selectedTab.owner) {
          this.selectedTab.owner = null;
        }
@@ -319,7 +331,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
  
        // 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 +3519,22 @@
            noInitialLabel,
            skipBackgroundNotify,
          });
@@ -342,7 +354,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
          if (insertTab) {
            // Insert the tab into the tab container in the correct position.
            this.#insertTabAtIndex(t, {
-@@ -3418,6 +3541,7 @@
+@@ -3418,6 +3543,7 @@
              ownerTab,
              openerTab,
              pinned,
@@ -350,7 +362,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
              bulkOrderedOpen,
              tabGroup: tabGroup ?? openerTab?.group,
            });
-@@ -3436,6 +3560,7 @@
+@@ -3436,6 +3562,7 @@
            openWindowInfo,
            skipLoad,
            triggeringRemoteType,
@@ -358,7 +370,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
          }));
  
          if (focusUrlBar) {
-@@ -3560,6 +3685,12 @@
+@@ -3560,6 +3687,12 @@
          }
        }
  
@@ -371,7 +383,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        // Additionally send pinned tab events
        if (pinned) {
          this.#notifyPinnedStatus(t);
-@@ -3570,6 +3701,15 @@
+@@ -3570,6 +3703,15 @@
        if (!inBackground) {
          this.selectedTab = t;
        }
@@ -387,7 +399,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        return t;
      }
  
-@@ -3802,6 +3942,7 @@
+@@ -3802,6 +3944,7 @@
          isAdoptingGroup = false,
          isUserTriggered = false,
          telemetryUserCreateSource = "unknown",
@@ -395,7 +407,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        } = {}
      ) {
        if (
-@@ -3812,9 +3953,6 @@
+@@ -3812,9 +3955,6 @@
              !this.isSplitViewWrapper(tabOrSplitView)
          )
        ) {
@@ -405,7 +417,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        }
  
        if (!color) {
-@@ -3835,9 +3973,14 @@
+@@ -3835,9 +3975,14 @@
          label,
          isAdoptingGroup
        );
@@ -422,7 +434,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        );
        group.addTabs(tabsAndSplitViews);
  
-@@ -3958,7 +4101,7 @@
+@@ -3958,7 +4103,7 @@
        }
  
        this.#handleTabMove(tab, () =>
@@ -431,7 +443,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        );
      }
  
-@@ -4044,6 +4187,7 @@
+@@ -4044,6 +4189,7 @@
          color: group.color,
          insertBefore: newTabs[0],
          isAdoptingGroup: true,
@@ -439,7 +451,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        });
      }
  
-@@ -4254,6 +4398,7 @@
+@@ -4254,6 +4400,7 @@
          openWindowInfo,
          skipLoad,
          triggeringRemoteType,
@@ -447,7 +459,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        }
      ) {
        // If we don't have a preferred remote type (or it is `NOT_REMOTE`), and
-@@ -4323,6 +4468,7 @@
+@@ -4323,6 +4470,7 @@
            openWindowInfo,
            name,
            skipLoad,
@@ -455,7 +467,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
          });
        }
  
-@@ -4536,9 +4682,9 @@
+@@ -4536,9 +4684,9 @@
          }
  
          // Add a new tab if needed.
@@ -467,7 +479,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
  
            let url = "about:blank";
            if (tabData.entries?.length) {
-@@ -4575,8 +4721,10 @@
+@@ -4575,8 +4723,10 @@
              insertTab: false,
              skipLoad: true,
              preferredRemoteType,
@@ -479,7 +491,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
            if (select) {
              tabToSelect = tab;
            }
-@@ -4598,7 +4746,8 @@
+@@ -4598,7 +4748,8 @@
            this.pinTab(tab);
            // Then ensure all the tab open/pinning information is sent.
            this._fireTabOpen(tab, {});
@@ -489,7 +501,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
            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 +4769,10 @@
                  tabGroup.stateData.id,
                  tabGroup.stateData.color,
                  tabGroup.stateData.collapsed,
@@ -501,7 +513,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
                );
                tabsFragment.appendChild(tabGroup.node);
              }
-@@ -4673,9 +4825,21 @@
+@@ -4673,9 +4827,21 @@
        // to remove the old selected tab.
        if (tabToSelect) {
          let leftoverTab = this.selectedTab;
@@ -523,7 +535,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
  
        if (tabs.length > 1 || !tabs[0].selected) {
          this._updateTabsAfterInsert();
-@@ -4866,11 +5030,17 @@
+@@ -4866,11 +5032,17 @@
        if (ownerTab) {
          tab.owner = ownerTab;
        }
@@ -542,7 +554,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
          if (
            !bulkOrderedOpen &&
            ((openerTab &&
-@@ -4882,7 +5052,7 @@
+@@ -4882,7 +5054,7 @@
            let lastRelatedTab =
              openerTab && this._lastRelatedTabMap.get(openerTab);
            let previousTab = lastRelatedTab || openerTab || this.selectedTab;
@@ -551,7 +563,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
              tabGroup = previousTab.group;
            }
            if (
-@@ -4898,7 +5068,7 @@
+@@ -4898,7 +5070,7 @@
                  previousTab.splitview
                ) + 1;
            } else if (previousTab.visible) {
@@ -560,7 +572,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
            } else if (previousTab == FirefoxViewHandler.tab) {
              elementIndex = 0;
            }
-@@ -4926,14 +5096,14 @@
+@@ -4926,14 +5098,14 @@
        }
        // Ensure index is within bounds.
        if (tab.pinned) {
@@ -579,7 +591,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
  
        if (pinned && !itemAfter?.pinned) {
          itemAfter = null;
-@@ -4950,7 +5120,7 @@
+@@ -4950,7 +5122,7 @@
  
        this.tabContainer._invalidateCachedTabs();
  
@@ -588,7 +600,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
          if (
            (this.isTab(itemAfter) && itemAfter.group == tabGroup) ||
            this.isSplitViewWrapper(itemAfter)
-@@ -4981,7 +5151,11 @@
+@@ -4981,7 +5153,11 @@
          const tabContainer = pinned
            ? this.tabContainer.pinnedTabsContainer
            : this.tabContainer;
@@ -600,7 +612,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        }
  
        if (tab.group?.collapsed) {
-@@ -4996,6 +5170,7 @@
+@@ -4996,6 +5172,7 @@
        if (pinned) {
          this._updateTabBarForPinnedTabs();
        }
@@ -608,7 +620,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
  
        TabBarVisibility.update();
      }
-@@ -5544,6 +5719,7 @@
+@@ -5544,6 +5721,7 @@
          telemetrySource,
        } = {}
      ) {
@@ -616,7 +628,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        // When 'closeWindowWithLastTab' pref is enabled, closing all tabs
        // can be considered equivalent to closing the window.
        if (
-@@ -5633,6 +5809,7 @@
+@@ -5633,6 +5811,7 @@
          if (lastToClose) {
            this.removeTab(lastToClose, aParams);
          }
@@ -624,7 +636,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        } catch (e) {
          console.error(e);
        }
-@@ -5678,6 +5855,14 @@
+@@ -5678,6 +5857,14 @@
          return;
        }
  
@@ -639,7 +651,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        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 +5870,9 @@
+@@ -5685,6 +5872,9 @@
        // state).
        let tabWidth = window.windowUtils.getBoundsWithoutFlushing(aTab).width;
        let isLastTab = this.#isLastTabInWindow(aTab);
@@ -649,7 +661,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        if (
          !this._beginRemoveTab(aTab, {
            closeWindowFastpath: true,
-@@ -5696,13 +5884,14 @@
+@@ -5696,13 +5886,14 @@
            telemetrySource,
          })
        ) {
@@ -665,7 +677,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        let lockTabSizing =
          !this.tabContainer.verticalMode &&
          !aTab.pinned &&
-@@ -5733,7 +5922,13 @@
+@@ -5733,7 +5924,13 @@
          // We're not animating, so we can cancel the animation stopwatch.
          Glean.browserTabclose.timeAnim.cancel(aTab._closeTimeAnimTimerId);
          aTab._closeTimeAnimTimerId = null;
@@ -680,7 +692,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
          return;
        }
  
-@@ -5867,7 +6062,7 @@
+@@ -5867,7 +6064,7 @@
            closeWindowWithLastTab != null
              ? closeWindowWithLastTab
              : !window.toolbar.visible ||
@@ -689,7 +701,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
  
          if (closeWindow) {
            // We've already called beforeunload on all the relevant tabs if we get here,
-@@ -5891,6 +6086,7 @@
+@@ -5891,6 +6088,7 @@
  
          newTab = true;
        }
@@ -697,7 +709,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        aTab._endRemoveArgs = [closeWindow, newTab];
  
        // swapBrowsersAndCloseOther will take care of closing the window without animation.
-@@ -5931,13 +6127,7 @@
+@@ -5931,13 +6129,7 @@
        aTab._mouseleave();
  
        if (newTab) {
@@ -712,7 +724,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        } else {
          TabBarVisibility.update();
        }
-@@ -6070,6 +6260,7 @@
+@@ -6070,6 +6262,7 @@
          this.tabs[i]._tPos = i;
        }
  
@@ -720,7 +732,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        if (!this._windowIsClosing) {
          // update tab close buttons state
          this.tabContainer._updateCloseButtons();
-@@ -6255,6 +6446,7 @@
+@@ -6255,6 +6448,7 @@
          memory_after: await getTotalMemoryUsage(),
          time_to_unload_in_ms: timeElapsed,
        });
@@ -728,7 +740,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
      }
  
      /**
-@@ -6300,6 +6492,7 @@
+@@ -6300,6 +6494,7 @@
        }
  
        let excludeTabs = new Set(aExcludeTabs);
@@ -736,7 +748,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
  
        // If this tab has a successor, it should be selectable, since
        // hiding or closing a tab removes that tab as a successor.
-@@ -6312,15 +6505,22 @@
+@@ -6312,15 +6507,22 @@
          !excludeTabs.has(aTab.owner) &&
          Services.prefs.getBoolPref("browser.tabs.selectOwnerOnClose")
        ) {
@@ -761,7 +773,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        let tab = this.tabContainer.findNextTab(aTab, {
          direction: 1,
          filter: _tab => remainingTabs.includes(_tab),
-@@ -6334,7 +6534,7 @@
+@@ -6334,7 +6536,7 @@
        }
  
        if (tab) {
@@ -770,7 +782,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        }
  
        // If no qualifying visible tab was found, see if there is a tab in
-@@ -6355,7 +6555,7 @@
+@@ -6355,7 +6557,7 @@
          });
        }
  
@@ -779,7 +791,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
      }
  
      _blurTab(aTab) {
-@@ -6366,7 +6566,7 @@
+@@ -6366,7 +6568,7 @@
       * @returns {boolean}
       *   False if swapping isn't permitted, true otherwise.
       */
@@ -788,7 +800,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        // Do not allow transfering a private tab to a non-private window
        // and vice versa.
        if (
-@@ -6420,6 +6620,7 @@
+@@ -6420,6 +6622,7 @@
        // fire the beforeunload event in the process.  Close the other
        // window if this was its last tab.
        if (
@@ -796,7 +808,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
          !remoteBrowser._beginRemoveTab(aOtherTab, {
            adoptedByTab: aOurTab,
            closeWindowWithLastTab: true,
-@@ -6431,7 +6632,7 @@
+@@ -6431,7 +6634,7 @@
        // 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.
@@ -805,7 +817,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        if (closeWindow) {
          let win = aOtherTab.documentGlobal;
          win.windowUtils.suppressAnimation(true);
-@@ -6565,11 +6766,13 @@
+@@ -6565,11 +6768,13 @@
        }
  
        // Finish tearing down the tab that's going away.
@@ -819,7 +831,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
  
        this.setTabTitle(aOurTab);
  
-@@ -6771,10 +6974,10 @@
+@@ -6771,10 +6976,10 @@
        SessionStore.deleteCustomTabValue(aTab, "hiddenBy");
      }
  
@@ -832,7 +844,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
          aTab.selected ||
          aTab.closing ||
          // Tabs that are sharing the screen, microphone or camera cannot be hidden.
-@@ -6834,7 +7037,8 @@
+@@ -6834,7 +7039,8 @@
       * @param {object} [aOptions={}]
       *   Key-value pairs that will be serialized into the features string.
       */
@@ -842,7 +854,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        if (this.tabs.length == 1) {
          return null;
        }
-@@ -6851,7 +7055,7 @@
+@@ -6851,7 +7057,7 @@
        // tell a new window to take the "dropped" tab
        let args = Cc["@mozilla.org/array;1"].createInstance(Ci.nsIMutableArray);
        args.appendElement(aTab.splitview ?? aTab);
@@ -851,7 +863,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
          private: PrivateBrowsingUtils.isWindowPrivate(window),
          features: Object.entries(aOptions)
            .map(([key, value]) => `${key}=${value}`)
-@@ -6859,6 +7063,8 @@
+@@ -6859,6 +7065,8 @@
          openerWindow: window,
          args,
        });
@@ -860,7 +872,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
      }
  
      /**
-@@ -6971,7 +7177,7 @@
+@@ -6971,7 +7179,7 @@
       *   `true` if element is a `<tab-group>`
       */
      isTabGroup(element) {
@@ -869,7 +881,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
      }
  
      /**
-@@ -7056,8 +7262,8 @@
+@@ -7056,8 +7264,8 @@
        }
  
        // Don't allow mixing pinned and unpinned tabs.
@@ -880,7 +892,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        } else {
          tabIndex = Math.max(tabIndex, this.pinnedTabCount);
        }
-@@ -7103,8 +7309,8 @@
+@@ -7103,8 +7311,8 @@
        this.#handleTabMove(
          element,
          () => {
@@ -891,7 +903,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
              neighbor = neighbor.group;
            }
            if (neighbor?.splitview) {
-@@ -7115,6 +7321,12 @@
+@@ -7115,6 +7323,12 @@
                return;
              }
            }
@@ -904,7 +916,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
  
            if (movingForwards && neighbor) {
              neighbor.after(element);
-@@ -7173,23 +7385,31 @@
+@@ -7173,23 +7387,31 @@
      #moveTabNextTo(element, targetElement, moveBefore = false, metricsContext) {
        if (this.isTabGroupLabel(targetElement)) {
          targetElement = targetElement.group;
@@ -942,7 +954,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        } 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 +7422,35 @@
+@@ -7202,12 +7424,35 @@
          //    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.
@@ -979,7 +991,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
  
        // 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 +7459,7 @@
+@@ -7216,6 +7461,7 @@
        }
  
        let getContainer = () =>
@@ -987,7 +999,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
          element.pinned
            ? this.tabContainer.pinnedTabsContainer
            : this.tabContainer;
-@@ -7224,11 +7468,15 @@
+@@ -7224,11 +7470,15 @@
          element,
          () => {
            if (moveBefore) {
@@ -1004,7 +1016,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
            }
          },
          metricsContext
-@@ -7302,11 +7550,15 @@
+@@ -7302,11 +7552,15 @@
       * @param {TabMetricsContext} [metricsContext]
       */
      moveTabToExistingGroup(aTab, aGroup, metricsContext) {
@@ -1023,7 +1035,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        }
        if (aTab.group && aTab.group.id === aGroup.id) {
          return;
-@@ -7378,6 +7630,7 @@
+@@ -7378,6 +7632,7 @@
  
        let state = {
          tabIndex: tab._tPos,
@@ -1031,7 +1043,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        };
        if (tab.visible) {
          state.elementIndex = tab.elementIndex;
-@@ -7409,7 +7662,7 @@
+@@ -7409,7 +7664,7 @@
        let changedSplitView =
          previousTabState.splitViewId != currentTabState.splitViewId;
  
@@ -1040,7 +1052,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
          tab.dispatchEvent(
            new CustomEvent("TabMove", {
              bubbles: true,
-@@ -7456,6 +7709,10 @@
+@@ -7456,6 +7711,10 @@
  
        moveActionCallback();
  
@@ -1051,7 +1063,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        // Clear tabs cache after moving nodes because the order of tabs may have
        // changed.
        this.tabContainer._invalidateCachedTabs();
-@@ -7506,7 +7763,22 @@
+@@ -7506,7 +7765,22 @@
       * @returns {object}
       *    The new tab in the current window, null if the tab couldn't be adopted.
       */
@@ -1075,7 +1087,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        // 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 +7821,8 @@
+@@ -7549,6 +7823,8 @@
        }
        params.skipLoad = true;
        let newTab = this.addWebTab("about:blank", params);
@@ -1084,7 +1096,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
  
        aTab.container.tabDragAndDrop.finishAnimateTabMove();
  
-@@ -8259,7 +8533,7 @@
+@@ -8259,7 +8535,7 @@
          // preventDefault(). It will still raise the window if appropriate.
          return;
        }
@@ -1093,7 +1105,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        window.focus();
        aEvent.preventDefault();
      }
-@@ -8276,7 +8550,6 @@
+@@ -8276,7 +8552,6 @@
  
      on_TabGroupCollapse(aEvent) {
        aEvent.target.tabs.forEach(tab => {
@@ -1101,7 +1113,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
        });
      }
  
-@@ -8630,7 +8903,9 @@
+@@ -8630,7 +8905,9 @@
  
          let filter = this._tabFilters.get(tab);
          if (filter) {
@@ -1111,7 +1123,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
  
            let listener = this._tabListeners.get(tab);
            if (listener) {
-@@ -9435,6 +9710,7 @@
+@@ -9435,6 +9712,7 @@
              aWebProgress.isTopLevel
            ) {
              this.mTab.setAttribute("busy", "true");
@@ -1119,7 +1131,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
              gBrowser._tabAttrModified(this.mTab, ["busy"]);
              this.mTab._notselectedsinceload = !this.mTab.selected;
            }
-@@ -9515,6 +9791,7 @@
+@@ -9515,6 +9793,7 @@
          // known defaults. Note we use the original URL since about:newtab
          // redirects to a prerendered page.
          const shouldRemoveFavicon =
@@ -1127,7 +1139,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
            !this.mBrowser.mIconURL &&
            !ignoreBlank &&
            !(originalLocation.spec in FAVICON_DEFAULTS);
-@@ -9689,13 +9966,6 @@
+@@ -9689,13 +9968,6 @@
              this.mBrowser.originalURI = aRequest.originalURI;
            }
  
@@ -1141,7 +1153,7 @@ index 08b5b56e069d038d72c87355920c4ce8a55ed805..87f41c8583c26f364530def5bd5d8333
          }
  
          let userContextId = this.mBrowser.getAttribute("usercontextid") || 0;
-@@ -10587,7 +10857,8 @@ var TabContextMenu = {
+@@ -10587,7 +10859,8 @@ var TabContextMenu = {
      );
      contextUnpinSelectedTabs.hidden =
        !this.contextTab.pinned || !this.multiselected;

src/browser/components/urlbar/UrlbarUtils-sys-mjs.patch

@@ -1,9 +1,9 @@
 diff --git a/browser/components/urlbar/UrlbarUtils.sys.mjs b/browser/components/urlbar/UrlbarUtils.sys.mjs
-index 2f03bdf632c6ca15c728df2801162da5159682da..6834daede8cb11854f137602100183d85a930686 100644
+index aa7c67f2bfaa3f15d592a14b527a8721dfc9bc6f..d2fe012796ea3a5be05090a732011b3cf92b78be 100644
 --- a/browser/components/urlbar/UrlbarUtils.sys.mjs
 +++ b/browser/components/urlbar/UrlbarUtils.sys.mjs
-@@ -109,6 +109,8 @@ export var UrlbarUtils = {
-     RESTRICT_SEARCH_KEYWORD: "restrictSearchKeyword",
+@@ -110,6 +110,8 @@ export var UrlbarUtils = {
+     SEMANTIC_HISTORY: "semanticHistory",
      SUGGESTED_INDEX: "suggestedIndex",
      TAIL_SUGGESTION: "tailSuggestion",
 +    ZEN_ACTION: "zenAction",
@@ -11,7 +11,7 @@ index 2f03bdf632c6ca15c728df2801162da5159682da..6834daede8cb11854f137602100183d8
    }),
  
    // Defines provider types.
-@@ -170,6 +172,8 @@ export var UrlbarUtils = {
+@@ -171,6 +173,8 @@ export var UrlbarUtils = {
      OTHER_NETWORK: 6,
      ADDON: 7,
      ACTIONS: 8,
@@ -20,7 +20,7 @@ index 2f03bdf632c6ca15c728df2801162da5159682da..6834daede8cb11854f137602100183d8
    }),
  
    // Per-result exposure telemetry.
-@@ -319,6 +323,14 @@ export var UrlbarUtils = {
+@@ -320,6 +324,14 @@ export var UrlbarUtils = {
          telemetryLabel: "actions",
          uiLabel: "urlbar-searchmode-actions2",
        },
@@ -35,7 +35,7 @@ index 2f03bdf632c6ca15c728df2801162da5159682da..6834daede8cb11854f137602100183d8
      ]);
    },
  
-@@ -611,6 +623,12 @@ export var UrlbarUtils = {
+@@ -612,6 +624,12 @@ export var UrlbarUtils = {
            return this.RESULT_GROUP.HEURISTIC_FALLBACK;
          case "UrlbarProviderHistoryUrlHeuristic":
            return this.RESULT_GROUP.HEURISTIC_HISTORY_URL;

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

@@ -486,8 +486,6 @@ groupbox h2 {
 #tabGroupSuggestions,
 #web-appearance-manage-themes-link,
 #setting-control-sidebarChatbotFieldset,
-#aiControlsDescription,
-#category-ai-features,
 #setting-control-supportFirefox,
 .mission-message,
 html|setting-group:is([data-subcategory="layout"], [groupid="support"]) {

src/zen/common/modules/ZenUIManager.mjs

@@ -1579,6 +1579,7 @@ window.gZenVerticalTabsManager = {
           overflowElements.appendChild(child);
         } else {
           const element = document.getElementById("page-action-buttons");
+          child.setAttribute("context", "toolbar-context-menu");
           element.before(child);
         }
         return;
@@ -1612,7 +1613,9 @@ window.gZenVerticalTabsManager = {
         // it will reset to the original name anyway
         if (hasChanged || (this._tabEdited.zenStaticLabel && newName)) {
           this._tabEdited.zenStaticLabel = newName;
-          gBrowser._setTabLabel(this._tabEdited, newName);
+          gBrowser._setTabLabel(this._tabEdited, newName, {
+            _zenChangeLabelFlag: true,
+          });
           gZenUIManager.showToast("zen-tabs-renamed");
         } else {
           delete this._tabEdited.zenStaticLabel;
@@ -1708,7 +1711,8 @@ window.gZenVerticalTabsManager = {
       this._tabEdited.after(input);
     }
     input.focus();
-    input.select();
+    input.setSelectionRange(0, input.value.length, "backward");
+    input.scrollLeft = 0;
 
     input.addEventListener("blur", this._renameTabHalt);
   },

src/zen/common/zen-sets.js

@@ -115,7 +115,9 @@ document.addEventListener(
             });
             break;
           case "cmd_zenTogglePinTab": {
-            const currentTab = gBrowser.selectedTab;
+            const currentTab = gZenGlanceManager.getTabOrGlanceParent(
+              gBrowser.selectedTab
+            );
             if (currentTab && !currentTab.hasAttribute("zen-empty-tab")) {
               if (currentTab.pinned) {
                 gBrowser.unpinTab(currentTab);

src/zen/compact-mode/sidebar.inc.css

@@ -51,6 +51,10 @@
     --zen-toolbox-max-width: 74px !important;
     --zen-compact-float: var(--zen-element-separation);
 
+    @media (-moz-mac-tahoe-theme) {
+      --zen-compact-mode-no-padding-radius-fix: -2px;
+    }
+
     :root[zen-no-padding='true'] & {
       --zen-compact-float: 10px;
       --zen-compact-top-toolbar-hidden-fix: var(--zen-compact-float);

src/zen/glance/ZenGlanceManager.mjs

@@ -85,8 +85,7 @@ class nsZenGlanceManager extends nsZenDOMOperatedFeature {
     menuitem.addEventListener("command", () =>
       this.openGlance({
         url: gContextMenu.linkURL,
-        triggeringPrincipal:
-          Services.scriptSecurityManager.getSystemPrincipal(),
+        triggeringPrincipal: gContextMenu.principal,
       })
     );
 
@@ -354,6 +353,28 @@ class nsZenGlanceManager extends nsZenDOMOperatedFeature {
     return this.#lastLinkClickData;
   }
 
+  /**
+   * Check whether a glance load is permitted for its triggering principal.
+   *
+   * @param {object} data - Glance data including URL and triggeringPrincipal
+   * @returns {boolean} Whether the load is allowed
+   */
+  #isGlanceLoadAllowed(data) {
+    const { url, triggeringPrincipal } = data ?? {};
+    if (typeof url !== "string" || !url.length || !triggeringPrincipal) {
+      return false;
+    }
+    try {
+      Services.scriptSecurityManager.checkLoadURIStrWithPrincipal(
+        triggeringPrincipal,
+        url
+      );
+    } catch {
+      return false;
+    }
+    return true;
+  }
+
   /**
    * Open a glance overlay with the specified data
    *
@@ -371,6 +392,13 @@ class nsZenGlanceManager extends nsZenDOMOperatedFeature {
       return Promise.resolve(this.#currentTab);
     }
 
+    // Existing-tab glances perform no navigation and are exempt; for fresh
+    // loads, refuse any URL the triggering principal isn't allowed to load
+    // (e.g. a web page linking to file://).
+    if (!existingTab && !this.#isGlanceLoadAllowed(data)) {
+      return Promise.resolve(null);
+    }
+
     if (!data.height || !data.width) {
       data = {
         ...data,

src/zen/space-routing/ZenSpaceRoutingManager.sys.mjs

@@ -245,10 +245,6 @@ class nsZenSpaceRoutingManager {
           if (targetWorkspace) {
             workspaces.moveTabToWorkspace(newTab, targetWorkspace.uuid);
 
-            if (inBackground) {
-              return;
-            }
-
             const mostRecentWindow =
               Services.wm.getMostRecentWindow("navigator:browser");
             const isOriginatingWindow = win === mostRecentWindow;
@@ -256,7 +252,10 @@ class nsZenSpaceRoutingManager {
               win.gZenWorkspaces.lastSelectedWorkspaceTabs[
                 targetWorkspace.uuid
               ] = newTab;
-              await win.gZenWorkspaces.changeWorkspace(targetWorkspace);
+
+              if (!inBackground) {
+                await win.gZenWorkspaces.changeWorkspace(targetWorkspace);
+              }
             }
           }
         }

src/zen/spaces/ZenSpaceCreation.mjs

@@ -182,8 +182,8 @@ class nsZenWorkspaceCreation extends MozXULElement {
         this.onProfileCommand.bind(this)
       );
       this.profilesPopup.addEventListener(
-        "popupshown",
-        this.onProfilePopupShown.bind(this)
+        "popupshowing",
+        this.onProfilePopupShowing.bind(this)
       );
       this.profilesPopup.addEventListener(
         "command",
@@ -296,7 +296,7 @@ class nsZenWorkspaceCreation extends MozXULElement {
     this.profilesPopup.openPopup(event.target, "after_start");
   }
 
-  onProfilePopupShown(event) {
+  onProfilePopupShowing(event) {
     return window.createUserContextMenu(event, {
       isContextMenu: true,
       showDefaultTab: true,

src/zen/split-view/ZenViewSplitter.mjs

@@ -1229,7 +1229,11 @@ class nsZenViewSplitter extends nsZenDOMOperatedFeature {
     const newTab = this.openAndSwitchToTab(url, {
       skipRoute: true,
       inBackground: false,
+      triggeringPrincipal: window.gContextMenu.principal,
     });
+    if (!newTab) {
+      return;
+    }
     this.splitTabs([currentTab, newTab], undefined, 1);
   }
 
@@ -1979,9 +1983,24 @@ class nsZenViewSplitter extends nsZenDOMOperatedFeature {
    * @returns {tab} The tab that was opened
    */
   openAndSwitchToTab(url, options) {
+    const triggeringPrincipal = options?.triggeringPrincipal;
+    if (!triggeringPrincipal) {
+      return null;
+    }
+    try {
+      Services.scriptSecurityManager.checkLoadURIStrWithPrincipal(
+        triggeringPrincipal,
+        url
+      );
+    } catch {
+      return null;
+    }
     const parentWindow = window.parent;
     const targetWindow = parentWindow || window;
-    const tab = targetWindow.gBrowser.addTrustedTab(url, options);
+    const tab = targetWindow.gBrowser.addTab(url, {
+      ...options,
+      triggeringPrincipal,
+    });
     targetWindow.gBrowser.selectedTab = tab;
     return tab;
   }

surfer.json

@@ -5,8 +5,8 @@
   "binaryName": "zen",
   "version": {
     "product": "firefox",
-    "version": "152.0.3",
-    "candidate": "152.0.3",
+    "version": "152.0.4",
+    "candidate": "152.0.4",
     "candidateBuild": 1
   },
   "buildOptions": {
@@ -20,7 +20,7 @@
       "brandShortName": "Zen",
       "brandFullName": "Zen Browser",
       "release": {
-        "displayVersion": "1.21.4b",
+        "displayVersion": "1.21.5b",
         "github": {
           "repo": "zen-browser/desktop"
         },