feat: Fixed folders on new windows not expanding at startup, b=no-bug, c=common, folders, tabs, workspaces

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

@@ -1,5 +1,5 @@
 diff --git a/browser/components/sessionstore/SessionStore.sys.mjs b/browser/components/sessionstore/SessionStore.sys.mjs
-index 2c2f43bf743ef458b378e85e9ed44a971711e1d9..4a229300d837ffead46a966ea23b37cd1ef01db2 100644
+index 2c2f43bf743ef458b378e85e9ed44a971711e1d9..33f630dea72da70352e131144c87549060ccd78d 100644
 --- a/browser/components/sessionstore/SessionStore.sys.mjs
 +++ b/browser/components/sessionstore/SessionStore.sys.mjs
 @@ -127,6 +127,8 @@ const TAB_EVENTS = [
@@ -221,8 +221,8 @@ index 2c2f43bf743ef458b378e85e9ed44a971711e1d9..4a229300d837ffead46a966ea23b37cd
 +    if (tabData.zenIsEmpty) {
 +      tab.setAttribute("zen-empty-tab", "true");
 +    }
-+    if (tabData.zenHasStaticLabel) {
-+      tab.setAttribute("zen-has-static-label", "true");
++    if (tabData.zenStaticLabel) {
++      tab.zenStaticLabel = tabData.zenStaticLabel;
 +    }
 +    if (tabData.zenHasStaticIcon) {
 +      tab.setAttribute("zen-has-static-icon", "true");

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

@@ -1,5 +1,5 @@
 diff --git a/browser/components/sessionstore/TabState.sys.mjs b/browser/components/sessionstore/TabState.sys.mjs
-index 82721356d191055bec0d4b0ca49e481221988801..7b3ba1b3a6df2b5031d3d96579e564d9de38ba9c 100644
+index 82721356d191055bec0d4b0ca49e481221988801..e0fde4fc475471d170ce46c1207e6e7b67fcaf1d 100644
 --- a/browser/components/sessionstore/TabState.sys.mjs
 +++ b/browser/components/sessionstore/TabState.sys.mjs
 @@ -85,7 +85,25 @@ class _TabState {
@@ -14,7 +14,7 @@ index 82721356d191055bec0d4b0ca49e481221988801..7b3ba1b3a6df2b5031d3d96579e564d9
 +    tabData.zenPinnedEntry = tab.getAttribute("zen-pinned-entry");
 +    tabData.zenPinnedIcon = tab.getAttribute("zen-pinned-icon");
 +    tabData.zenIsEmpty = tab.hasAttribute("zen-empty-tab");
-+    tabData.zenHasStaticLabel = tab.hasAttribute("zen-has-static-label");
++    tabData.zenStaticLabel = tab.zenStaticLabel;
 +    tabData.zenHasStaticIcon = tab.hasAttribute("zen-has-static-icon");
 +    tabData.zenGlanceId = tab.getAttribute("glance-id");
 +    tabData.zenIsGlance = tab.hasAttribute("zen-glance-tab");

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 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44c9fe0117 100644
+index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..a87bcaf4e9b92a9f63e025409efabca90aa52900 100644
 --- a/browser/components/tabbrowser/content/tabbrowser.js
 +++ b/browser/components/tabbrowser/content/tabbrowser.js
 @@ -386,6 +386,7 @@
@@ -171,20 +171,19 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        // If focus is on the old tab, move it to the new tab.
        if (activeEl == oldTab) {
          newTab.focus();
-@@ -1945,7 +2017,11 @@
+@@ -1945,6 +2017,11 @@
      }
  
      _setTabLabel(aTab, aLabel, { beforeTabOpen, isContentTitle, isURL } = {}) {
--      if (!aLabel || aLabel.includes("about:reader?")) {
 +      if (!aTab._zenContentsVisible && !aTab._zenChangeLabelFlag && !aTab._labelIsInitialTitle && !gZenWorkspaces.privateWindowOrDisabled) {
 +        return false;
 +      }
++      aLabel = aTab.zenStaticLabel || aLabel;
 +      gZenPinnedTabManager.onTabLabelChanged(aTab);
-+      if (!aLabel || aLabel.includes("about:reader?") || (aTab.hasAttribute("zen-has-static-label") && !aTab._zenChangeLabelFlag)) {
+       if (!aLabel || aLabel.includes("about:reader?")) {
          return false;
        }
- 
-@@ -2053,7 +2129,7 @@
+@@ -2053,7 +2130,7 @@
          newIndex = this.selectedTab._tPos + 1;
        }
  
@@ -193,7 +192,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
          if (this.isTabGroupLabel(targetTab)) {
            throw new Error(
              "Replacing a tab group label with a tab is not supported"
-@@ -2328,6 +2404,7 @@
+@@ -2328,6 +2405,7 @@
        uriIsAboutBlank,
        userContextId,
        skipLoad,
@@ -201,7 +200,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
      } = {}) {
        let b = document.createXULElement("browser");
        // Use the JSM global to create the permanentKey, so that if the
-@@ -2401,8 +2478,7 @@
+@@ -2401,8 +2479,7 @@
          // we use a different attribute name for this?
          b.setAttribute("name", name);
        }
@@ -211,7 +210,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
          b.setAttribute("transparent", "true");
        }
  
-@@ -2567,7 +2643,7 @@
+@@ -2567,7 +2644,7 @@
  
        let panel = this.getPanel(browser);
        let uniqueId = this._generateUniquePanelID();
@@ -220,7 +219,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        aTab.linkedPanel = uniqueId;
  
        // Inject the <browser> into the DOM if necessary.
-@@ -2626,8 +2702,8 @@
+@@ -2626,8 +2703,8 @@
        // 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) {
@@ -231,7 +230,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        } else {
          aTab.linkedBrowser.browsingContext.hasSiblings = this.tabs.length > 1;
        }
-@@ -2814,7 +2890,6 @@
+@@ -2814,7 +2891,6 @@
              this.selectedTab = this.addTrustedTab(BROWSER_NEW_TAB_URL, {
                tabIndex: tab._tPos + 1,
                userContextId: tab.userContextId,
@@ -239,7 +238,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
                focusUrlBar: true,
              });
              resolve(this.selectedBrowser);
-@@ -2923,6 +2998,9 @@
+@@ -2923,6 +2999,9 @@
          schemelessInput,
          hasValidUserGestureActivation = false,
          textDirectiveUserActivation = false,
@@ -249,7 +248,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        } = {}
      ) {
        // all callers of addTab that pass a params object need to pass
-@@ -2933,10 +3011,17 @@
+@@ -2933,10 +3012,17 @@
          );
        }
  
@@ -267,7 +266,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        // If we're opening a foreground tab, set the owner by default.
        ownerTab ??= inBackground ? null : this.selectedTab;
  
-@@ -2944,6 +3029,7 @@
+@@ -2944,6 +3030,7 @@
        if (this.selectedTab.owner) {
          this.selectedTab.owner = null;
        }
@@ -275,7 +274,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
  
        // Find the tab that opened this one, if any. This is used for
        // determining positioning, and inherited attributes such as the
-@@ -2996,6 +3082,21 @@
+@@ -2996,6 +3083,21 @@
            noInitialLabel,
            skipBackgroundNotify,
          });
@@ -297,7 +296,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
          if (insertTab) {
            // Insert the tab into the tab container in the correct position.
            this.#insertTabAtIndex(t, {
-@@ -3004,6 +3105,7 @@
+@@ -3004,6 +3106,7 @@
              ownerTab,
              openerTab,
              pinned,
@@ -305,7 +304,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
              bulkOrderedOpen,
              tabGroup: tabGroup ?? openerTab?.group,
            });
-@@ -3022,6 +3124,7 @@
+@@ -3022,6 +3125,7 @@
            openWindowInfo,
            skipLoad,
            triggeringRemoteType,
@@ -313,7 +312,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
          }));
  
          if (focusUrlBar) {
-@@ -3146,6 +3249,12 @@
+@@ -3146,6 +3250,12 @@
          }
        }
  
@@ -326,7 +325,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        // Additionally send pinned tab events
        if (pinned) {
          this.#notifyPinnedStatus(t);
-@@ -3349,10 +3458,10 @@
+@@ -3349,10 +3459,10 @@
          isAdoptingGroup = false,
          isUserTriggered = false,
          telemetryUserCreateSource = "unknown",
@@ -338,7 +337,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        }
  
        if (!color) {
-@@ -3373,9 +3482,14 @@
+@@ -3373,9 +3483,14 @@
          label,
          isAdoptingGroup
        );
@@ -355,7 +354,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        );
        group.addTabs(tabs);
  
-@@ -3496,7 +3610,7 @@
+@@ -3496,7 +3611,7 @@
        }
  
        this.#handleTabMove(tab, () =>
@@ -364,7 +363,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        );
      }
  
-@@ -3698,6 +3812,7 @@
+@@ -3698,6 +3813,7 @@
          openWindowInfo,
          skipLoad,
          triggeringRemoteType,
@@ -372,7 +371,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        }
      ) {
        // If we don't have a preferred remote type (or it is `NOT_REMOTE`), and
-@@ -3767,6 +3882,7 @@
+@@ -3767,6 +3883,7 @@
            openWindowInfo,
            name,
            skipLoad,
@@ -380,7 +379,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
          });
        }
  
-@@ -3955,7 +4071,7 @@
+@@ -3955,7 +4072,7 @@
          // Add a new tab if needed.
          if (!tab) {
            let createLazyBrowser =
@@ -389,7 +388,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
  
            let url = "about:blank";
            if (tabData.entries?.length) {
-@@ -3992,8 +4108,10 @@
+@@ -3992,8 +4109,10 @@
              insertTab: false,
              skipLoad: true,
              preferredRemoteType,
@@ -401,7 +400,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
            if (select) {
              tabToSelect = tab;
            }
-@@ -4005,7 +4123,8 @@
+@@ -4005,7 +4124,8 @@
            this.pinTab(tab);
            // Then ensure all the tab open/pinning information is sent.
            this._fireTabOpen(tab, {});
@@ -411,7 +410,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
            let { groupId } = tabData;
            const tabGroup = tabGroupWorkingData.get(groupId);
            // if a tab refers to a tab group we don't know, skip any group
-@@ -4019,7 +4138,10 @@
+@@ -4019,7 +4139,10 @@
                  tabGroup.stateData.id,
                  tabGroup.stateData.color,
                  tabGroup.stateData.collapsed,
@@ -423,7 +422,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
                );
                tabsFragment.appendChild(tabGroup.node);
              }
-@@ -4064,9 +4186,23 @@
+@@ -4064,9 +4187,23 @@
        // to remove the old selected tab.
        if (tabToSelect) {
          let leftoverTab = this.selectedTab;
@@ -447,7 +446,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
  
        if (tabs.length > 1 || !tabs[0].selected) {
          this._updateTabsAfterInsert();
-@@ -4257,11 +4393,14 @@
+@@ -4257,11 +4394,14 @@
        if (ownerTab) {
          tab.owner = ownerTab;
        }
@@ -463,7 +462,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
          if (
            !bulkOrderedOpen &&
            ((openerTab &&
-@@ -4273,7 +4412,7 @@
+@@ -4273,7 +4413,7 @@
            let lastRelatedTab =
              openerTab && this._lastRelatedTabMap.get(openerTab);
            let previousTab = lastRelatedTab || openerTab || this.selectedTab;
@@ -472,7 +471,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
              tabGroup = previousTab.group;
            }
            if (
-@@ -4284,7 +4423,7 @@
+@@ -4284,7 +4424,7 @@
            ) {
              elementIndex = Infinity;
            } else if (previousTab.visible) {
@@ -481,7 +480,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
            } else if (previousTab == FirefoxViewHandler.tab) {
              elementIndex = 0;
            }
-@@ -4312,14 +4451,14 @@
+@@ -4312,14 +4452,14 @@
        }
        // Ensure index is within bounds.
        if (tab.pinned) {
@@ -500,7 +499,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
  
        if (pinned && !itemAfter?.pinned) {
          itemAfter = null;
-@@ -4330,7 +4469,7 @@
+@@ -4330,7 +4470,7 @@
  
        this.tabContainer._invalidateCachedTabs();
  
@@ -509,7 +508,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
          if (this.isTab(itemAfter) && itemAfter.group == tabGroup) {
            // Place at the front of, or between tabs in, the same tab group
            this.tabContainer.insertBefore(tab, itemAfter);
-@@ -4358,7 +4497,11 @@
+@@ -4358,7 +4498,11 @@
          const tabContainer = pinned
            ? this.tabContainer.pinnedTabsContainer
            : this.tabContainer;
@@ -521,7 +520,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        }
  
        this._updateTabsAfterInsert();
-@@ -4366,6 +4509,7 @@
+@@ -4366,6 +4510,7 @@
        if (pinned) {
          this._updateTabBarForPinnedTabs();
        }
@@ -529,7 +528,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
  
        TabBarVisibility.update();
      }
-@@ -4916,6 +5060,7 @@
+@@ -4916,6 +5061,7 @@
          telemetrySource,
        } = {}
      ) {
@@ -537,7 +536,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        // When 'closeWindowWithLastTab' pref is enabled, closing all tabs
        // can be considered equivalent to closing the window.
        if (
-@@ -5005,6 +5150,7 @@
+@@ -5005,6 +5151,7 @@
          if (lastToClose) {
            this.removeTab(lastToClose, aParams);
          }
@@ -545,7 +544,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        } catch (e) {
          console.error(e);
        }
-@@ -5043,6 +5189,12 @@
+@@ -5043,6 +5190,12 @@
          aTab._closeTimeNoAnimTimerId = Glean.browserTabclose.timeNoAnim.start();
        }
  
@@ -558,7 +557,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        // Handle requests for synchronously removing an already
        // asynchronously closing tab.
        if (!animate && aTab.closing) {
-@@ -5057,6 +5209,9 @@
+@@ -5057,6 +5210,9 @@
        // state).
        let tabWidth = window.windowUtils.getBoundsWithoutFlushing(aTab).width;
        let isLastTab = this.#isLastTabInWindow(aTab);
@@ -568,7 +567,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        if (
          !this._beginRemoveTab(aTab, {
            closeWindowFastpath: true,
-@@ -5105,7 +5260,13 @@
+@@ -5105,7 +5261,13 @@
          // We're not animating, so we can cancel the animation stopwatch.
          Glean.browserTabclose.timeAnim.cancel(aTab._closeTimeAnimTimerId);
          aTab._closeTimeAnimTimerId = null;
@@ -583,7 +582,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
          return;
        }
  
-@@ -5239,7 +5400,7 @@
+@@ -5239,7 +5401,7 @@
            closeWindowWithLastTab != null
              ? closeWindowWithLastTab
              : !window.toolbar.visible ||
@@ -592,7 +591,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
  
          if (closeWindow) {
            // We've already called beforeunload on all the relevant tabs if we get here,
-@@ -5263,6 +5424,7 @@
+@@ -5263,6 +5425,7 @@
  
          newTab = true;
        }
@@ -600,7 +599,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        aTab._endRemoveArgs = [closeWindow, newTab];
  
        // swapBrowsersAndCloseOther will take care of closing the window without animation.
-@@ -5303,13 +5465,7 @@
+@@ -5303,13 +5466,7 @@
        aTab._mouseleave();
  
        if (newTab) {
@@ -615,7 +614,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        } else {
          TabBarVisibility.update();
        }
-@@ -5442,6 +5598,7 @@
+@@ -5442,6 +5599,7 @@
          this.tabs[i]._tPos = i;
        }
  
@@ -623,7 +622,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        if (!this._windowIsClosing) {
          // update tab close buttons state
          this.tabContainer._updateCloseButtons();
-@@ -5663,6 +5820,7 @@
+@@ -5663,6 +5821,7 @@
        }
  
        let excludeTabs = new Set(aExcludeTabs);
@@ -631,7 +630,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
  
        // If this tab has a successor, it should be selectable, since
        // hiding or closing a tab removes that tab as a successor.
-@@ -5675,13 +5833,13 @@
+@@ -5675,13 +5834,13 @@
          !excludeTabs.has(aTab.owner) &&
          Services.prefs.getBoolPref("browser.tabs.selectOwnerOnClose")
        ) {
@@ -647,7 +646,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        );
  
        let tab = this.tabContainer.findNextTab(aTab, {
-@@ -5697,7 +5855,7 @@
+@@ -5697,7 +5856,7 @@
        }
  
        if (tab) {
@@ -656,7 +655,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        }
  
        // If no qualifying visible tab was found, see if there is a tab in
-@@ -5718,7 +5876,7 @@
+@@ -5718,7 +5877,7 @@
          });
        }
  
@@ -665,7 +664,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
      }
  
      _blurTab(aTab) {
-@@ -5729,7 +5887,7 @@
+@@ -5729,7 +5888,7 @@
       * @returns {boolean}
       *   False if swapping isn't permitted, true otherwise.
       */
@@ -674,7 +673,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        // Do not allow transfering a private tab to a non-private window
        // and vice versa.
        if (
-@@ -5783,6 +5941,7 @@
+@@ -5783,6 +5942,7 @@
        // fire the beforeunload event in the process.  Close the other
        // window if this was its last tab.
        if (
@@ -682,7 +681,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
          !remoteBrowser._beginRemoveTab(aOtherTab, {
            adoptedByTab: aOurTab,
            closeWindowWithLastTab: true,
-@@ -5794,7 +5953,7 @@
+@@ -5794,7 +5954,7 @@
        // 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.
@@ -691,7 +690,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        if (closeWindow) {
          let win = aOtherTab.ownerGlobal;
          win.windowUtils.suppressAnimation(true);
-@@ -5918,11 +6077,13 @@
+@@ -5918,11 +6078,13 @@
        }
  
        // Finish tearing down the tab that's going away.
@@ -705,7 +704,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
  
        this.setTabTitle(aOurTab);
  
-@@ -6124,10 +6285,10 @@
+@@ -6124,10 +6286,10 @@
        SessionStore.deleteCustomTabValue(aTab, "hiddenBy");
      }
  
@@ -718,7 +717,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
          aTab.selected ||
          aTab.closing ||
          // Tabs that are sharing the screen, microphone or camera cannot be hidden.
-@@ -6185,7 +6346,8 @@
+@@ -6185,7 +6347,8 @@
       *
       * @param {MozTabbrowserTab|MozTabbrowserTabGroup|MozTabbrowserTabGroup.labelElement} aTab
       */
@@ -728,7 +727,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        if (this.tabs.length == 1) {
          return null;
        }
-@@ -6209,12 +6371,14 @@
+@@ -6209,12 +6372,14 @@
        }
  
        // tell a new window to take the "dropped" tab
@@ -744,7 +743,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
      }
  
      /**
-@@ -6319,7 +6483,7 @@
+@@ -6319,7 +6484,7 @@
       *   `true` if element is a `<tab-group>`
       */
      isTabGroup(element) {
@@ -753,7 +752,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
      }
  
      /**
-@@ -6404,8 +6568,8 @@
+@@ -6404,8 +6569,8 @@
        }
  
        // Don't allow mixing pinned and unpinned tabs.
@@ -764,7 +763,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        } else {
          tabIndex = Math.max(tabIndex, this.pinnedTabCount);
        }
-@@ -6431,10 +6595,16 @@
+@@ -6431,10 +6596,16 @@
        this.#handleTabMove(
          element,
          () => {
@@ -783,7 +782,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
            if (neighbor && this.isTab(element) && tabIndex > element._tPos) {
              neighbor.after(element);
            } else {
-@@ -6492,23 +6662,28 @@
+@@ -6492,23 +6663,28 @@
      #moveTabNextTo(element, targetElement, moveBefore = false, metricsContext) {
        if (this.isTabGroupLabel(targetElement)) {
          targetElement = targetElement.group;
@@ -818,7 +817,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        } 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
-@@ -6521,14 +6696,34 @@
+@@ -6521,14 +6697,34 @@
          //    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.
@@ -854,7 +853,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
          element.pinned
            ? this.tabContainer.pinnedTabsContainer
            : this.tabContainer;
-@@ -6537,7 +6732,7 @@
+@@ -6537,7 +6733,7 @@
          element,
          () => {
            if (moveBefore) {
@@ -863,7 +862,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
            } else if (targetElement) {
              targetElement.after(element);
            } else {
-@@ -6607,10 +6802,10 @@
+@@ -6607,10 +6803,10 @@
       * @param {TabMetricsContext} [metricsContext]
       */
      moveTabToGroup(aTab, aGroup, metricsContext) {
@@ -876,7 +875,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
          return;
        }
        if (aTab.group && aTab.group.id === aGroup.id) {
-@@ -6656,6 +6851,7 @@
+@@ -6656,6 +6852,7 @@
  
        let state = {
          tabIndex: tab._tPos,
@@ -884,7 +883,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        };
        if (tab.visible) {
          state.elementIndex = tab.elementIndex;
-@@ -6682,7 +6878,7 @@
+@@ -6682,7 +6879,7 @@
        let changedTabGroup =
          previousTabState.tabGroupId != currentTabState.tabGroupId;
  
@@ -893,7 +892,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
          tab.dispatchEvent(
            new CustomEvent("TabMove", {
              bubbles: true,
-@@ -6723,6 +6919,10 @@
+@@ -6723,6 +6920,10 @@
  
        moveActionCallback();
  
@@ -904,15 +903,16 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
        // Clear tabs cache after moving nodes because the order of tabs may have
        // changed.
        this.tabContainer._invalidateCachedTabs();
-@@ -6815,6 +7015,7 @@
+@@ -6815,6 +7016,8 @@
          params.userContextId = aTab.getAttribute("usercontextid");
        }
        let newTab = this.addWebTab("about:blank", params);
 +      newTab._zenContentsVisible = true;
++      newTab.zenStaticLabel = aTab.zenStaticLabel;
        let newBrowser = this.getBrowserForTab(newTab);
  
        aTab.container.tabDragAndDrop.finishAnimateTabMove();
-@@ -7623,7 +7824,7 @@
+@@ -7623,7 +7826,7 @@
              // preventDefault(). It will still raise the window if appropriate.
              break;
            }
@@ -921,7 +921,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
            window.focus();
            aEvent.preventDefault();
            break;
-@@ -7640,7 +7841,6 @@
+@@ -7640,7 +7843,6 @@
          }
          case "TabGroupCollapse":
            aEvent.target.tabs.forEach(tab => {
@@ -929,7 +929,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
            });
            break;
          case "TabGroupCreateByUser":
-@@ -8589,6 +8789,7 @@
+@@ -8589,6 +8791,7 @@
              aWebProgress.isTopLevel
            ) {
              this.mTab.setAttribute("busy", "true");
@@ -937,7 +937,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
              gBrowser._tabAttrModified(this.mTab, ["busy"]);
              this.mTab._notselectedsinceload = !this.mTab.selected;
            }
-@@ -8670,6 +8871,7 @@
+@@ -8670,6 +8873,7 @@
          // known defaults. Note we use the original URL since about:newtab
          // redirects to a prerendered page.
          const shouldRemoveFavicon =
@@ -945,7 +945,7 @@ index 42027bfa55eab8ea9298a7d425f2ded45188f7f3..8916896fae6807fb4c033022f1f50e44
            !this.mBrowser.mIconURL &&
            !ignoreBlank &&
            !(originalLocation.spec in FAVICON_DEFAULTS);
-@@ -9623,7 +9825,7 @@ var TabContextMenu = {
+@@ -9623,7 +9827,7 @@ var TabContextMenu = {
      );
      contextUnpinSelectedTabs.hidden =
        !this.contextTab.pinned || !this.multiselected;

src/zen/common/modules/ZenSessionStore.mjs

@@ -21,8 +21,8 @@ class ZenSessionStore extends nsZenPreloadedFeature {
     if (tabData.zenSyncId || tabData.zenPinnedId) {
       tab.setAttribute('id', tabData.zenSyncId || tabData.zenPinnedId);
     }
-    if (tabData.zenHasStaticLabel) {
-      tab.setAttribute('zen-has-static-label', 'true');
+    if (tabData.zenStaticLabel) {
+      tab.zenStaticLabel = tabData.zenStaticLabel;
     }
     if (tabData.zenHasStaticIcon) {
       tab.setAttribute('zen-has-static-icon', 'true');

src/zen/common/modules/ZenUIManager.mjs

@@ -1306,12 +1306,12 @@ window.gZenVerticalTabsManager = {
         // Check if name is blank, reset if so
         // Always remove, so we can always rename and if it's empty,
         // it will reset to the original name anyway
-        this._tabEdited.removeAttribute('zen-has-static-label');
         if (hasChanged) {
+          this._tabEdited.zenStaticLabel = newName;
           gBrowser._setTabLabel(this._tabEdited, newName);
-          this._tabEdited.setAttribute('zen-has-static-label', 'true');
           gZenUIManager.showToast('zen-tabs-renamed');
         } else {
+          delete this._tabEdited.zenStaticLabel;
           gBrowser.setTabTitle(this._tabEdited);
         }
 

src/zen/folders/ZenFolders.mjs

@@ -544,9 +544,7 @@ class nsZenFolders extends nsZenDOMOperatedFeature {
     //   that we want it to initially be collapsed.
     setTimeout(
       (folder) => {
-        gZenPinnedTabManager.promiseInitializedPinned.then(() => {
-          folder.collapsed = !!options.collapsed;
-        });
+        folder.collapsed = !!options.collapsed;
       },
       0,
       folder

src/zen/sessionstore/ZenWindowSync.sys.mjs

@@ -109,6 +109,9 @@ class nsZenWindowSync {
     for (let topic of OBSERVING) {
       Services.obs.addObserver(this, topic);
     }
+    lazy.SessionStore.promiseAllWindowsRestored.then(() => {
+      this.#onSessionStoreInitialized();
+    });
   }
 
   uninit() {
@@ -162,6 +165,27 @@ class nsZenWindowSync {
     }
   }
 
+  /**
+   * Called when the session store has finished initializing for a window.
+   *
+   * @param {Window} aWindow - The browser window that has initialized session store.
+   */
+  #onSessionStoreInitialized() {
+    // For every tab we have in where there's no sync ID, we need to
+    // assign one and sync it to other windows.
+    // This should only happen really when updating from an older version
+    // that didn't have this feature.
+    this.#runOnAllWindows(null, (aWindow) => {
+      const { gBrowser } = aWindow;
+      for (let tab of gBrowser.tabs) {
+        if (!tab.id) {
+          tab.id = this.#newTabSyncId;
+          lazy.TabStateFlusher.flush(tab.linkedBrowser);
+        }
+      }
+    });
+  }
+
   /**
    * @returns {string} A unique tab ID.
    */
@@ -279,6 +303,9 @@ class nsZenWindowSync {
    * @returns {MozTabbrowserTab|MozTabbrowserTabGroup|null} The item element if found, otherwise null.
    */
   #getItemFromWindow(aWindow, aItemId) {
+    if (!aItemId) {
+      return null;
+    }
     return aWindow.document.getElementById(aItemId);
   }
 
@@ -325,9 +352,9 @@ class nsZenWindowSync {
     if (flags & SYNC_FLAG_LABEL) {
       if (gBrowser.isTab(aOriginalItem)) {
         aTargetItem._zenChangeLabelFlag = true;
+        aTargetItem.zenStaticLabel = aOriginalItem.zenStaticLabel;
         gBrowser._setTabLabel(aTargetItem, aOriginalItem.label);
         delete aTargetItem._zenChangeLabelFlag;
-        this.#maybeSyncAttributeChange(aOriginalItem, aTargetItem, 'zen-has-static-label');
       } else if (gBrowser.isTabGroup(aOriginalItem)) {
         aTargetItem.label = aOriginalItem.label;
       }
@@ -493,7 +520,7 @@ class nsZenWindowSync {
     }
 
     // Restore the listeners for the swapped in tab.
-    if (!onClose) {
+    if (!onClose && filter) {
       tabListener = new otherTabBrowser.zenTabProgressListener(aTab, otherBrowser, true, false);
       otherTabBrowser._tabListeners.set(aTab, tabListener);
 
@@ -753,18 +780,21 @@ class nsZenWindowSync {
    * Sets the initial pinned state for a tab across all windows.
    *
    * @param {Object} aTab - The tab to set the pinned state for.
+   * @returns {Promise} A promise that resolves when the operation is complete.
    */
   setPinnedTabState(aTab) {
-    const state = this.#getTabState(aTab);
-    const initialState = {
-      entry: state.entries[state.index - 1],
-      image: state.image,
-    };
-    this.#runOnAllWindows(null, (win) => {
-      const targetTab = this.#getItemFromWindow(win, aTab.id);
-      if (targetTab) {
-        targetTab._zenPinnedInitialState = initialState;
-      }
+    return lazy.TabStateFlusher.flush(aTab.linkedBrowser).finally(() => {
+      const state = this.#getTabState(aTab);
+      const initialState = {
+        entry: state.entries[state.index - 1],
+        image: state.image,
+      };
+      this.#runOnAllWindows(null, (win) => {
+        const targetTab = this.#getItemFromWindow(win, aTab.id);
+        if (targetTab) {
+          targetTab._zenPinnedInitialState = initialState;
+        }
+      });
     });
   }
 

src/zen/tabs/ZenPinnedTabManager.mjs

@@ -61,10 +61,6 @@ class ZenPinnedTabsObserver {
 }
 
 class nsZenPinnedTabManager extends nsZenDOMOperatedFeature {
-  promiseInitializedPinned = new Promise((resolve) => {
-    this._resolvePinnedInitializedInternal = resolve;
-  });
-
   init() {
     if (!this.enabled) {
       return;
@@ -797,16 +793,6 @@ class nsZenPinnedTabManager extends nsZenDOMOperatedFeature {
     return document.documentElement.getAttribute('zen-sidebar-expanded') === 'true';
   }
 
-  async updatePinTitle(tab, newTitle, isEdited = true) {
-    tab.removeAttribute('zen-has-static-label');
-    if (isEdited) {
-      gBrowser._setTabLabel(tab, newTitle);
-      tab.setAttribute('zen-has-static-label', 'true');
-    } else {
-      gBrowser.setTabTitle(tab);
-    }
-  }
-
   canEssentialBeAdded(tab) {
     return (
       !(

src/zen/workspaces/ZenWorkspaces.mjs

@@ -1248,7 +1248,7 @@ class nsZenWorkspaces {
     if (this.privateWindowOrDisabled) {
       return;
     }
-    const workspacesData = this.getWorkspaces();
+    const workspacesData = this._workspaceCache;
     const index = workspacesData.findIndex((ws) => ws.uuid === workspaceData.uuid);
     if (index !== -1) {
       workspacesData[index] = workspaceData;