gh-15545: Rank exact and prefix URL bar action matches above fuzzy ones (gh-15546)

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

@@ -78,6 +78,7 @@ library-downloads-opening-in = { PLATFORM() ->
     [windows] Opening in File Explorer…
    *[other] Opening in file manager…
 }
+library-downloads-open-when-done = Opens when finished
 library-downloads-cancel-button =
     .title = Cancel download
 library-downloads-filter-title = Filter Downloads…

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

@@ -1,8 +1,8 @@
 diff --git a/browser/base/content/browser-init.js b/browser/base/content/browser-init.js
-index 0aa4baea8e5e6d742fc6cd3333068e7eb64b5bbc..057bb2386420edd31154979338e71d00a51a7266 100644
+index 2f3f46d8d82dc90ebca8d64ace9d6bf1ee127937..163eb027b8cca1d43af24fff762e951e6f1030fc 100644
 --- a/browser/base/content/browser-init.js
 +++ b/browser/base/content/browser-init.js
-@@ -307,6 +307,7 @@ var gBrowserInit = {
+@@ -279,6 +279,7 @@ var gBrowserInit = {
    },
  
    onLoad() {
@@ -10,11 +10,3 @@ index 0aa4baea8e5e6d742fc6cd3333068e7eb64b5bbc..057bb2386420edd31154979338e71d00
      gBrowser.addEventListener("DOMUpdateBlockedPopups", e =>
        PopupAndRedirectBlockerObserver.handleEvent(e)
      );
-@@ -501,6 +502,7 @@ var gBrowserInit = {
- 
-     this._handleURIToLoad();
- 
-+    gZenWorkspaces.selectStartPage();
-     Services.obs.addObserver(gIdentityHandler, "perm-changed");
-     Services.obs.addObserver(gRemoteControl, "devtools-socket");
-     Services.obs.addObserver(gRemoteControl, "marionette-listening");

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 52fc803050cd257d6de52b1e4a92f3211cbaba88..a9841832ddce540dc0f9b14c29e5eadac7510935 100644
+index 52fc803050cd257d6de52b1e4a92f3211cbaba88..ecfcef5dabb7056886972651cd35835564684a0e 100644
 --- a/browser/components/sessionstore/SessionStore.sys.mjs
 +++ b/browser/components/sessionstore/SessionStore.sys.mjs
 @@ -111,6 +111,11 @@ const TAB_EVENTS = [
@@ -308,20 +308,37 @@ index 52fc803050cd257d6de52b1e4a92f3211cbaba88..a9841832ddce540dc0f9b14c29e5eada
            tabbrowser.removeTab(tabbrowser.tabs[i]);
          }
        }
-@@ -5529,6 +5580,12 @@ class _SessionStore {
+@@ -5504,6 +5555,11 @@ class _SessionStore {
-         savedTabGroup => !openTabGroupIdsInWindow.has(savedTabGroup.id)
+       this.#prefBranch.getBoolPref("sessionstore.restore_tabs_lazily") &&
-       );
+       this.#restore_on_demand;
-     }
+ 
 +    if (winData.isZenUnsynced) {
 +      aWindow.document.documentElement.setAttribute("zen-unsynced-window", "true");
 +    }
-+    aWindow.gZenFolders?.restoreDataFromSessionStore(winData.folders);
 +    aWindow.gZenWorkspaces?.restoreWorkspacesFromSessionStore(winData);
++
+     this.#log.debug(
+       `restoreWindow, will restore ${winData.tabs.length} tabs and ${
+         winData.groups?.length ?? 0
+@@ -5529,6 +5585,8 @@ class _SessionStore {
+         savedTabGroup => !openTabGroupIdsInWindow.has(savedTabGroup.id)
+       );
+     }
++    aWindow.gZenFolders?.restoreDataFromSessionStore(winData.folders);
 +    aWindow.gZenViewSplitter?.restoreDataFromSessionStore(winData.splitViewData);
  
      // Move the originally open tabs to the end.
      if (initialTabs) {
-@@ -6098,6 +6155,25 @@ class _SessionStore {
+@@ -5630,6 +5688,8 @@ class _SessionStore {
+     // set smoothScroll back to the original value
+     arrowScrollbox.smoothScroll = smoothScroll;
+ 
++    aWindow.gZenWorkspaces?.onWindowRestored();
++
+     Glean.sessionRestore.restoreWindow.stopAndAccumulate(timerId);
+   }
+ 
+@@ -6098,6 +6158,25 @@ class _SessionStore {
  
      // Most of tabData has been restored, now continue with restoring
      // attributes that may trigger external events.
@@ -347,7 +364,7 @@ index 52fc803050cd257d6de52b1e4a92f3211cbaba88..a9841832ddce540dc0f9b14c29e5eada
  
      if (tabData.pinned) {
        tabbrowser.pinTab(tab);
-@@ -6272,6 +6348,9 @@ class _SessionStore {
+@@ -6272,6 +6351,9 @@ class _SessionStore {
          aWindow.gURLBar.readOnly = false;
        }
      }
@@ -357,7 +374,7 @@ index 52fc803050cd257d6de52b1e4a92f3211cbaba88..a9841832ddce540dc0f9b14c29e5eada
  
      let promiseParts = Promise.withResolvers();
      const wasMinimized = aWindow.windowState == aWindow.STATE_MINIMIZED;
-@@ -6774,6 +6853,7 @@ class _SessionStore {
+@@ -6774,6 +6856,7 @@ class _SessionStore {
     */
    #isCmdLineEmpty(aWindow, aState) {
      var pinnedOnly =
@@ -365,7 +382,7 @@ index 52fc803050cd257d6de52b1e4a92f3211cbaba88..a9841832ddce540dc0f9b14c29e5eada
        aState.windows &&
        aState.windows.every(win => win.tabs.every(tab => tab.pinned));
  
-@@ -7116,7 +7196,7 @@ class _SessionStore {
+@@ -7116,7 +7199,7 @@ class _SessionStore {
  
        let groupsToSave = new Map();
        for (let tIndex = 0; tIndex < window.tabs.length; ) {
@@ -374,7 +391,7 @@ index 52fc803050cd257d6de52b1e4a92f3211cbaba88..a9841832ddce540dc0f9b14c29e5eada
            // Adjust window.selected
            if (tIndex + 1 < window.selected) {
              window.selected -= 1;
-@@ -7131,7 +7211,7 @@ class _SessionStore {
+@@ -7131,7 +7214,7 @@ class _SessionStore {
            );
            // We don't want to increment tIndex here.
            continue;
@@ -383,7 +400,7 @@ index 52fc803050cd257d6de52b1e4a92f3211cbaba88..a9841832ddce540dc0f9b14c29e5eada
            // Convert any open groups into saved groups.
            let groupStateToSave = window.groups.find(
              groupState => groupState.id == window.tabs[tIndex].groupId
-@@ -7691,7 +7771,6 @@ class _SessionStore {
+@@ -7691,7 +7774,6 @@ class _SessionStore {
      timer.initWithCallback(
        () => {
          if (beats <= 0) {
@@ -391,7 +408,7 @@ index 52fc803050cd257d6de52b1e4a92f3211cbaba88..a9841832ddce540dc0f9b14c29e5eada
            Glean.sessionRestore.shutdownFlushAllOutcomes.timed_out.add(1);
            deferred.resolve();
          }
-@@ -8174,6 +8253,7 @@ class _SessionStore {
+@@ -8174,6 +8256,7 @@ class _SessionStore {
      if (
        !savedTabGroupState.tabs.length ||
        this.getSavedTabGroup(savedTabGroupState.id)

src/browser/components/tabbrowser/Tabbrowser-sys-mjs.patch

@@ -1,5 +1,5 @@
 diff --git a/browser/components/tabbrowser/Tabbrowser.sys.mjs b/browser/components/tabbrowser/Tabbrowser.sys.mjs
-index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089db94a6d3 100644
+index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..ddb15aeafab54a595b8f710b2234f21411d4e99a 100644
 --- a/browser/components/tabbrowser/Tabbrowser.sys.mjs
 +++ b/browser/components/tabbrowser/Tabbrowser.sys.mjs
 @@ -484,6 +484,7 @@ export class Tabbrowser {
@@ -504,7 +504,24 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
        });
      }
  
-@@ -4943,8 +5121,9 @@ export class Tabbrowser {
+@@ -4889,6 +5067,16 @@ export class Tabbrowser {
+   ) {
+     let tabs = [];
+     let tabsFragment = this.document.createDocumentFragment();
++    let zenWorkspaces = this.documentGlobal.gZenWorkspaces;
++    let zenCollectsFragments =
++      !!zenWorkspaces?.canCollectSessionRestoreFragments;
++    if (zenCollectsFragments) {
++      zenWorkspaces.beginSessionRestoreFragments();
++    }
++    let zenFragmentFor = tabData =>
++      zenCollectsFragments
++        ? zenWorkspaces.getSessionRestoreFragment(tabData)
++        : tabsFragment;
+     let tabToSelect = null;
+     let hiddenTabs = new Map();
+     /** @type {Map<TabGroupId, TabGroupWorkingData>} */
+@@ -4943,8 +5131,9 @@ export class Tabbrowser {
        }
  
        // Add a new tab if needed.
@@ -516,7 +533,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
  
          let url = "about:blank";
          if (tabData.entries?.length) {
-@@ -4977,8 +5156,10 @@ export class Tabbrowser {
+@@ -4977,8 +5166,10 @@ export class Tabbrowser {
            insertTab: false,
            skipLoad: true,
            preferredRemoteType,
@@ -528,7 +545,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
          if (select) {
            tabToSelect = tab;
          }
-@@ -5000,7 +5181,8 @@ export class Tabbrowser {
+@@ -5000,7 +5191,8 @@ export class Tabbrowser {
          this.pinTab(tab);
          // Then ensure all the tab open/pinning information is sent.
          this.#fireTabOpen(tab, {});
@@ -538,7 +555,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
          let { groupId } = tabData;
          const tabGroup = tabGroupWorkingData.get(groupId);
          // if a tab refers to a tab group we don't know, skip any group
-@@ -5020,7 +5202,10 @@ export class Tabbrowser {
+@@ -5020,9 +5212,19 @@ export class Tabbrowser {
                tabGroup.stateData.id,
                tabGroup.stateData.color,
                tabGroup.stateData.collapsed,
@@ -548,9 +565,55 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
 +              tabGroup.stateData.essential,
 +              tabGroup.stateData.splitView,
              );
-             tabsFragment.appendChild(tabGroup.node);
+-            tabsFragment.appendChild(tabGroup.node);
++            // A group lives in the space of the tabs it holds, but its own
++            // pinned and essential state is what decides its section.
++            zenFragmentFor({
++              zenWorkspace: tabData.zenWorkspace,
++              userContextId: tabData.userContextId,
++              pinned: tabGroup.stateData.pinned ?? tabData.pinned,
++              zenEssential: tabGroup.stateData.essential ?? tabData.zenEssential,
++            }).appendChild(tabGroup.node);
            }
-@@ -5080,9 +5265,18 @@ export class Tabbrowser {
+         }
+       } else {
+@@ -5032,14 +5234,14 @@ export class Tabbrowser {
+         }
+ 
+         if (!splitView) {
+-          tabsFragment.appendChild(tab);
++          zenFragmentFor(tabData).appendChild(tab);
+         } else if (splitView?.node) {
+           // Treat split views as a unit for hiding purposes -- both tabs and
+           // the split view wrapper itself should be hidden.
+           if (splitView.tabs.some(t => t.hidden)) {
+             splitView.node.toggleAttribute("hidden", true);
+           }
+-          tabsFragment.appendChild(splitView.node);
++          zenFragmentFor(tabData).appendChild(splitView.node);
+         }
+ 
+         if (tabWasReused) {
+@@ -5051,7 +5253,17 @@ export class Tabbrowser {
+     }
+ 
+     // inject the top-level tab and tab group DOM nodes
+-    this.tabContainer.appendChild(tabsFragment);
++    if (zenCollectsFragments) {
++      zenWorkspaces.flushSessionRestoreFragments();
++      // allTabs only reaches the active space, so #updateTabsAfterInsert below
++      // would leave every tab restored into another space without a position.
++      // Session order is what SessionStore indexes these tabs by anyway.
++      for (let index = 0; index < tabs.length; index++) {
++        tabs[index]._index = index;
++      }
++    } else {
++      this.tabContainer.appendChild(tabsFragment);
++    }
+ 
+     // inject tab DOM nodes into the now-connected tab group and split view DOM nodes
+     for (const tabGroup of tabGroupWorkingData.values()) {
+@@ -5080,9 +5292,18 @@ export class Tabbrowser {
      // to remove the old selected tab.
      if (tabToSelect) {
        let leftoverTab = this.selectedTab;
@@ -569,7 +632,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
  
      if (tabs.length > 1 || !tabs[0].selected) {
        this.#updateTabsAfterInsert();
-@@ -5313,11 +5507,17 @@ export class Tabbrowser {
+@@ -5313,11 +5534,17 @@ export class Tabbrowser {
      if (ownerTab) {
        tab.owner = ownerTab;
      }
@@ -588,7 +651,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
        let insertRelatedAfterCurrent = Services.prefs.getBoolPref(
          "browser.tabs.insertRelatedAfterCurrent"
        );
-@@ -5332,7 +5532,7 @@ export class Tabbrowser {
+@@ -5332,7 +5559,7 @@ export class Tabbrowser {
            (insertRelatedAfterCurrent && lastRelatedTab) ||
            openerTab ||
            this.selectedTab;
@@ -597,7 +660,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
            tabGroup = previousTab.group;
          }
          if (
-@@ -5348,7 +5548,7 @@ export class Tabbrowser {
+@@ -5348,7 +5575,7 @@ export class Tabbrowser {
                previousTab.splitview
              ) + 1;
          } else if (previousTab.visible) {
@@ -606,7 +669,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
          } else if (previousTab == this.documentGlobal.FirefoxViewHandler.tab) {
            elementIndex = 0;
          }
-@@ -5376,14 +5576,14 @@ export class Tabbrowser {
+@@ -5376,14 +5603,14 @@ export class Tabbrowser {
      }
      // Ensure index is within bounds.
      if (tab.pinned) {
@@ -625,7 +688,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
  
      if (pinned && !itemAfter?.pinned) {
        itemAfter = null;
-@@ -5400,7 +5600,7 @@ export class Tabbrowser {
+@@ -5400,7 +5627,7 @@ export class Tabbrowser {
  
      this.tabContainer._invalidateCachedTabs();
  
@@ -634,7 +697,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
        if (
          (this.isTab(itemAfter) && itemAfter.group == tabGroup) ||
          this.isSplitViewWrapper(itemAfter)
-@@ -5431,7 +5631,11 @@ export class Tabbrowser {
+@@ -5431,7 +5658,11 @@ export class Tabbrowser {
        const tabContainer = pinned
          ? this.tabContainer.pinnedTabsContainer
          : this.tabContainer;
@@ -646,7 +709,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      }
  
      if (tab.group?.collapsed) {
-@@ -5446,6 +5650,7 @@ export class Tabbrowser {
+@@ -5446,6 +5677,7 @@ export class Tabbrowser {
      if (pinned) {
        this.#updateTabBarForPinnedTabs();
      }
@@ -654,7 +717,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
  
      this.documentGlobal.TabBarVisibility.update();
    }
-@@ -6025,6 +6230,7 @@ export class Tabbrowser {
+@@ -6025,6 +6257,7 @@ export class Tabbrowser {
        metricsContext,
      } = {}
    ) {
@@ -662,7 +725,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      // When 'closeWindowWithLastTab' pref is enabled, closing all tabs
      // can be considered equivalent to closing the window.
      if (
-@@ -6135,6 +6341,7 @@ export class Tabbrowser {
+@@ -6135,6 +6368,7 @@ export class Tabbrowser {
            closedTabCount -= 1;
          }
        }
@@ -670,7 +733,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
  
        if (closedTabCount > 0) {
          this.recordTabMetrics(
-@@ -6236,6 +6443,14 @@ export class Tabbrowser {
+@@ -6236,6 +6470,14 @@ export class Tabbrowser {
        return;
      }
  
@@ -685,7 +748,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      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
-@@ -6244,6 +6459,9 @@ export class Tabbrowser {
+@@ -6244,6 +6486,9 @@ export class Tabbrowser {
      let tabWidth =
        this.documentGlobal.windowUtils.getBoundsWithoutFlushing(aTab).width;
      let isLastTab = this.#isLastTabInWindow(aTab);
@@ -695,7 +758,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      if (
        !this.#beginRemoveTab(aTab, {
          closeWindowFastpath: true,
-@@ -6254,13 +6472,14 @@ export class Tabbrowser {
+@@ -6254,13 +6499,14 @@ export class Tabbrowser {
          metricsContext,
        })
      ) {
@@ -711,7 +774,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      let lockTabSizing =
        !this.tabContainer.verticalMode &&
        !aTab.pinned &&
-@@ -6291,7 +6510,13 @@ export class Tabbrowser {
+@@ -6291,7 +6537,13 @@ export class Tabbrowser {
        // We're not animating, so we can cancel the animation stopwatch.
        Glean.browserTabclose.timeAnim.cancel(aTab._closeTimeAnimTimerId);
        aTab._closeTimeAnimTimerId = null;
@@ -726,7 +789,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
        return;
      }
  
-@@ -6331,7 +6556,9 @@ export class Tabbrowser {
+@@ -6331,7 +6583,9 @@ export class Tabbrowser {
    get #shouldCloseWindowWithLastTab() {
      return (
        !this.documentGlobal.toolbar.visible ||
@@ -737,7 +800,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      );
    }
  
-@@ -6347,7 +6574,7 @@ export class Tabbrowser {
+@@ -6347,7 +6601,7 @@ export class Tabbrowser {
     */
    #isLastTabInWindow(tab) {
      for (const otherTab of this.tabs) {
@@ -746,7 +809,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
          return false;
        }
      }
-@@ -6488,6 +6715,7 @@ export class Tabbrowser {
+@@ -6488,6 +6742,7 @@ export class Tabbrowser {
  
        newTab = true;
      }
@@ -754,7 +817,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      aTab._endRemoveArgs = [closeWindow, newTab];
  
      // swapBrowsersAndCloseOther will take care of closing the window without animation.
-@@ -6542,13 +6770,7 @@ export class Tabbrowser {
+@@ -6542,13 +6797,7 @@ export class Tabbrowser {
      }
  
      if (newTab) {
@@ -769,7 +832,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      } else {
        this.documentGlobal.TabBarVisibility.update();
      }
-@@ -6701,6 +6923,7 @@ export class Tabbrowser {
+@@ -6701,6 +6950,7 @@ export class Tabbrowser {
        this.tabs[i]._index = i;
      }
  
@@ -777,7 +840,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      if (!this.#windowIsClosing) {
        // update tab close buttons state
        this.tabContainer._updateCloseButtons();
-@@ -6891,6 +7114,7 @@ export class Tabbrowser {
+@@ -6891,6 +7141,7 @@ export class Tabbrowser {
        memory_after: await getTotalMemoryUsage(),
        time_to_unload_in_ms: timeElapsed,
      });
@@ -785,7 +848,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
    }
  
    /**
-@@ -6937,11 +7161,12 @@ export class Tabbrowser {
+@@ -6937,11 +7188,12 @@ export class Tabbrowser {
      }
  
      let excludeTabs = new Set(aExcludeTabs);
@@ -799,7 +862,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      }
  
      if (
-@@ -6949,13 +7174,13 @@ export class Tabbrowser {
+@@ -6949,13 +7201,13 @@ export class Tabbrowser {
        !excludeTabs.has(aTab.owner) &&
        Services.prefs.getBoolPref("browser.tabs.selectOwnerOnClose")
      ) {
@@ -815,7 +878,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      );
  
      if (Services.prefs.getBoolPref("browser.tabs.selectMRUOnClose", false)) {
-@@ -6970,6 +7195,13 @@ export class Tabbrowser {
+@@ -6970,6 +7222,13 @@ export class Tabbrowser {
        }
      }
  
@@ -829,7 +892,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      let tab = this.tabContainer.findNextTab(aTab, {
        direction: 1,
        filter: _tab => remainingTabs.includes(_tab),
-@@ -6983,7 +7215,7 @@ export class Tabbrowser {
+@@ -6983,7 +7242,7 @@ export class Tabbrowser {
      }
  
      if (tab) {
@@ -838,7 +901,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      }
  
      // If no qualifying visible tab was found, see if there is a tab in
-@@ -7004,7 +7236,7 @@ export class Tabbrowser {
+@@ -7004,7 +7263,7 @@ export class Tabbrowser {
        });
      }
  
@@ -847,7 +910,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
    }
  
    #blurTab(aTab) {
-@@ -7021,7 +7253,7 @@ export class Tabbrowser {
+@@ -7021,7 +7280,7 @@ export class Tabbrowser {
     * @returns {boolean}
     *   False if swapping isn't permitted, true otherwise.
     */
@@ -856,7 +919,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      // Do not allow transfering a private tab to a non-private window
      // and vice versa.
      if (
-@@ -7080,6 +7312,7 @@ export class Tabbrowser {
+@@ -7080,6 +7339,7 @@ export class Tabbrowser {
      // fire the beforeunload event in the process.  Close the other
      // window if this was its last tab.
      if (
@@ -864,7 +927,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
        !remoteBrowser.#beginRemoveTab(aOtherTab, {
          adoptedByTab: aOurTab,
          closeWindowWithLastTab: true,
-@@ -7091,7 +7324,7 @@ export class Tabbrowser {
+@@ -7091,7 +7351,7 @@ export class Tabbrowser {
      // 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.
@@ -873,7 +936,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      if (closeWindow) {
        let win = aOtherTab.documentGlobal;
        win.windowUtils.suppressAnimation(true);
-@@ -7231,11 +7464,13 @@ export class Tabbrowser {
+@@ -7231,11 +7491,13 @@ export class Tabbrowser {
      }
  
      // Finish tearing down the tab that's going away.
@@ -887,7 +950,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
  
      this.setTabTitle(aOurTab);
  
-@@ -7484,10 +7719,10 @@ export class Tabbrowser {
+@@ -7484,10 +7746,10 @@ export class Tabbrowser {
      }
    }
  
@@ -900,7 +963,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
        aTab.selected ||
        aTab.closing ||
        // Tabs that are sharing the screen, microphone or camera cannot be hidden.
-@@ -7576,7 +7811,8 @@ export class Tabbrowser {
+@@ -7576,7 +7838,8 @@ export class Tabbrowser {
     * @param {object} [aOptions={}]
     *   Key-value pairs that will be serialized into the features string.
     */
@@ -910,7 +973,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      if (this.tabs.length == 1) {
        return null;
      }
-@@ -7593,7 +7829,7 @@ export class Tabbrowser {
+@@ -7593,7 +7856,7 @@ export class Tabbrowser {
      // tell a new window to take the "dropped" tab
      let args = Cc["@mozilla.org/array;1"].createInstance(Ci.nsIMutableArray);
      args.appendElement(aTab.splitview ?? aTab);
@@ -919,7 +982,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
        private: lazy.PrivateBrowsingUtils.isWindowPrivate(this.documentGlobal),
        features: Object.entries(aOptions)
          .map(([key, value]) => `${key}=${value}`)
-@@ -7601,6 +7837,8 @@ export class Tabbrowser {
+@@ -7601,6 +7864,8 @@ export class Tabbrowser {
        openerWindow: this.documentGlobal,
        args,
      });
@@ -928,7 +991,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
    }
  
    /**
-@@ -7734,7 +7972,7 @@ export class Tabbrowser {
+@@ -7734,7 +7999,7 @@ export class Tabbrowser {
     * @returns {element is MozTabbrowserTabGroup}
     */
    isTabGroup(element) {
@@ -937,7 +1000,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
    }
  
    /**
-@@ -7807,8 +8045,8 @@ export class Tabbrowser {
+@@ -7807,8 +8072,8 @@ export class Tabbrowser {
      }
  
      // Don't allow mixing pinned and unpinned tabs.
@@ -948,7 +1011,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      } else {
        tabIndex = Math.max(tabIndex, this.pinnedTabCount);
      }
-@@ -7854,8 +8092,8 @@ export class Tabbrowser {
+@@ -7854,8 +8119,8 @@ export class Tabbrowser {
      this.#handleTabMove(
        element,
        () => {
@@ -959,7 +1022,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
            neighbor = neighbor.group;
          }
          if (neighbor?.splitview) {
-@@ -7866,6 +8104,12 @@ export class Tabbrowser {
+@@ -7866,6 +8131,12 @@ export class Tabbrowser {
              return;
            }
          }
@@ -972,7 +1035,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
  
          if (movingForwards && neighbor) {
            neighbor.after(element);
-@@ -7939,23 +8183,31 @@ export class Tabbrowser {
+@@ -7939,23 +8210,31 @@ export class Tabbrowser {
    ) {
      if (this.isTabGroupLabel(targetElement)) {
        targetElement = targetElement.group;
@@ -1010,7 +1073,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      } 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
-@@ -7968,12 +8220,35 @@ export class Tabbrowser {
+@@ -7968,12 +8247,35 @@ export class Tabbrowser {
        //    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.
@@ -1047,7 +1110,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
  
      // 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.
-@@ -7982,6 +8257,7 @@ export class Tabbrowser {
+@@ -7982,6 +8284,7 @@ export class Tabbrowser {
      }
  
      let getContainer = () =>
@@ -1055,7 +1118,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
        element.pinned
          ? this.tabContainer.pinnedTabsContainer
          : this.tabContainer;
-@@ -7990,11 +8266,15 @@ export class Tabbrowser {
+@@ -7990,11 +8293,15 @@ export class Tabbrowser {
        element,
        () => {
          if (moveBefore) {
@@ -1072,7 +1135,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
          }
        },
        { metricsContext }
-@@ -8070,11 +8350,15 @@ export class Tabbrowser {
+@@ -8070,11 +8377,15 @@ export class Tabbrowser {
     *   The context for the operation for telemetry purposes.
     */
    moveTabToExistingGroup(aTab, aGroup, { metricsContext } = {}) {
@@ -1091,7 +1154,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      }
      if (aTab.group && aTab.group.id === aGroup.id) {
        return;
-@@ -8153,6 +8437,7 @@ export class Tabbrowser {
+@@ -8153,6 +8464,7 @@ export class Tabbrowser {
  
      let state = {
        tabIndex: tab.index,
@@ -1099,7 +1162,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      };
      if (tab.visible) {
        state.elementIndex = tab.elementIndex;
-@@ -8190,7 +8475,7 @@ export class Tabbrowser {
+@@ -8190,7 +8502,7 @@ export class Tabbrowser {
      let changedSplitView =
        previousTabState.splitViewId != currentTabState.splitViewId;
  
@@ -1108,7 +1171,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
        tab.dispatchEvent(
          new this.documentGlobal.CustomEvent("TabMove", {
            bubbles: true,
-@@ -8248,6 +8533,10 @@ export class Tabbrowser {
+@@ -8248,6 +8560,10 @@ export class Tabbrowser {
  
      moveActionCallback();
  
@@ -1119,7 +1182,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      // Clear tabs cache after moving nodes because the order of tabs may have
      // changed.
      this.tabContainer._invalidateCachedTabs();
-@@ -8307,7 +8596,22 @@ export class Tabbrowser {
+@@ -8307,7 +8623,22 @@ export class Tabbrowser {
     * @returns {object}
     *    The new tab in the current window, null if the tab couldn't be adopted.
     */
@@ -1143,7 +1206,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      // 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
-@@ -8350,6 +8654,8 @@ export class Tabbrowser {
+@@ -8350,6 +8681,8 @@ export class Tabbrowser {
      }
      params.skipLoad = true;
      let newTab = this.addWebTab("about:blank", params);
@@ -1152,7 +1215,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
  
      aTab.container.tabDragAndDrop.finishAnimateTabMove();
  
-@@ -9189,7 +9495,7 @@ export class Tabbrowser {
+@@ -9189,7 +9522,7 @@ export class Tabbrowser {
        // preventDefault(). It will still raise the window if appropriate.
        return;
      }
@@ -1161,7 +1224,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      this.documentGlobal.focus();
      aEvent.preventDefault();
    }
-@@ -9206,7 +9512,6 @@ export class Tabbrowser {
+@@ -9206,7 +9539,6 @@ export class Tabbrowser {
  
    on_TabGroupCollapse(aEvent) {
      aEvent.target.tabs.forEach(tab => {
@@ -1169,7 +1232,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
      });
    }
  
-@@ -9554,7 +9859,9 @@ export class Tabbrowser {
+@@ -9554,7 +9886,9 @@ export class Tabbrowser {
  
        let filter = this.#tabFilters.get(tab);
        if (filter) {
@@ -1179,7 +1242,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
  
          let listener = this.#tabListeners.get(tab);
          if (listener) {
-@@ -10354,6 +10661,7 @@ class TabProgressListener {
+@@ -10354,6 +10688,7 @@ class TabProgressListener {
            aWebProgress.isTopLevel
          ) {
            this._tab.setAttribute("busy", "true");
@@ -1187,7 +1250,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
            this.#tabbrowser._tabAttrModified(this._tab, ["busy"]);
            this._tab._notselectedsinceload = !this._tab.selected;
          }
-@@ -10434,6 +10742,7 @@ class TabProgressListener {
+@@ -10434,6 +10769,7 @@ class TabProgressListener {
        // known defaults. Note we use the original URL since about:newtab
        // redirects to a prerendered page.
        const shouldRemoveFavicon =
@@ -1195,7 +1258,7 @@ index f68e37926001384d0c8e80a3c163dc89e9c4ee5c..a9a5dfbc38348f2c070f22af2954a089
          !this._browser.mIconURL &&
          !ignoreBlank &&
          !(originalLocation.spec in FAVICON_DEFAULTS);
-@@ -10610,13 +10919,6 @@ class TabProgressListener {
+@@ -10610,13 +10946,6 @@ class TabProgressListener {
            this._browser.originalURI = aRequest.originalURI;
          }
  

src/zen/common/emojis/ZenEmojiPicker.mjs

@@ -73,6 +73,10 @@ class nsZenEmojiPicker extends nsZenDOMOperatedFeature {
           this.#changePage(false);
         } else if (event.target.id === "PanelUI-zen-emojis-picker-change-svg") {
           this.#changePage(true);
+        } else if (event.target.classList.contains("zen-emojis-picker-emoji")) {
+          this.#selectEmoji(event.target.getAttribute("label"));
+        } else if (event.target.classList.contains("zen-emojis-picker-svg")) {
+          this.#selectEmoji(this.getSVGURL(event.target.getAttribute("icon")));
         }
         break;
       case "input":
@@ -176,19 +180,17 @@ class nsZenEmojiPicker extends nsZenDOMOperatedFeature {
     this.searchInput.value = "";
     const allowEmojis = !this.#panel.hasAttribute("only-svg-icons");
     if (allowEmojis) {
-      const emojiList = this.emojiList;
+      const emojis = document.createDocumentFragment();
       for (const emoji of this.#emojis) {
         const item = document.createXULElement("toolbarbutton");
         item.className = "toolbarbutton-1 zen-emojis-picker-emoji";
         item.setAttribute("label", emoji.emoji);
         item.setAttribute("tooltiptext", "");
-        item.addEventListener("command", () => {
+        emojis.appendChild(item);
-          this.#selectEmoji(emoji.emoji);
-        });
-        emojiList.appendChild(item);
       }
+      this.emojiList.replaceChildren(emojis);
     }
-    const svgList = this.svgList;
+    const icons = document.createDocumentFragment();
     for (const icon of SVG_ICONS) {
       const item = document.createXULElement("toolbarbutton");
       item.className = "toolbarbutton-1 zen-emojis-picker-svg";
@@ -196,11 +198,9 @@ class nsZenEmojiPicker extends nsZenDOMOperatedFeature {
       item.setAttribute("tooltiptext", "");
       item.style.listStyleImage = `url(${this.getSVGURL(icon)})`;
       item.setAttribute("icon", icon);
-      item.addEventListener("command", () => {
+      icons.appendChild(item);
-        this.#selectEmoji(this.getSVGURL(icon));
-      });
-      svgList.appendChild(item);
     }
+    this.svgList.replaceChildren(icons);
   }
 
   #onPopupShown(event) {
@@ -220,10 +220,8 @@ class nsZenEmojiPicker extends nsZenDOMOperatedFeature {
     }
     this.#clearEmojis();
 
-    const emojiList = this.emojiList;
+    this.emojiList.replaceChildren();
-    emojiList.innerHTML = "";
+    this.svgList.replaceChildren();
-
-    this.svgList.innerHTML = "";
 
     if (!this.#hasSelection) {
       this.#currentPromiseReject?.(

src/zen/common/styles/zen-browser-container.css

@@ -9,6 +9,7 @@
     overflow: clip;
 
     :root:not([zen-no-padding="true"]) &:not(.zen-glance-overlay) {
+      box-shadow: var(--zen-big-shadow);
       /* stylelint-disable-next-line property-no-unknown */
       corner-shape: round;
       border-radius: calc(var(--zen-native-inner-radius) / var(--zen-squircle-value));

src/zen/common/styles/zen-omnibox.css

@@ -657,6 +657,7 @@
   --urlbarview-row-padding-block: 12px;
   --urlbarView-row-gutter: 0px;
 
+  border-block: 2px solid transparent;
   color: light-dark(rgba(0, 0, 0, 0.7), rgba(255, 255, 255, 0.7)) !important;
 
   &:hover,
@@ -698,7 +699,7 @@
 }
 
 #urlbar-results {
-  max-height: 244px;
+  max-height: 259px;
   overflow-y: auto;
   scrollbar-width: none;
   margin-block-start: calc(var(--urlbarView-results-padding) - 2px);

src/zen/folders/ZenFolders.mjs

@@ -1597,6 +1597,54 @@ class nsZenFolders extends nsZenDOMOperatedFeature {
     return true;
   }
 
+  /**
+   * Stops the animation running on an element and pins the value it had
+   * reached as an inline style.
+   *
+   * @param {Element} item - The element to settle.
+   * @param {string} prop - The camel cased property to pin.
+   * @returns {string|undefined} The value the property was left at, or
+   *   undefined if nothing was animating it.
+   */
+  #settleAnimation(item, prop) {
+    const animation = this.#itemAnimations.get(item);
+    if (
+      animation?.playState !== "running" &&
+      animation?.playState !== "paused"
+    ) {
+      return undefined;
+    }
+    const value = window.getComputedStyle(item)[prop];
+    animation.cancel();
+    item.style[prop] = value;
+    return value;
+  }
+
+  /**
+   * Measures how far up the group container has to be shifted to be fully
+   * collapsed, ignoring any collapse offset already applied to it.
+   *
+   * @param {Element} tabsContainer - The container to measure.
+   * @param {Element} groupStart - The element carrying the collapse offset.
+   * @returns {number} The height to shift the container by.
+   */
+  #measureCollapsedShift(tabsContainer, groupStart) {
+    const currentMargin = groupStart.style.marginTop;
+    if (!parseFloat(currentMargin)) {
+      // The container is not shifted, it already measures its full height.
+      return this.#calculateHeightShift(tabsContainer, []);
+    }
+    groupStart.style.marginTop = "0px";
+    // Note that these have to flush, the margin has just been changed.
+    let heightShift = tabsContainer.getBoundingClientRect().height;
+    if (tabsContainer.separatorElement) {
+      heightShift -=
+        tabsContainer.separatorElement.getBoundingClientRect().height;
+    }
+    groupStart.style.marginTop = currentMargin;
+    return heightShift;
+  }
+
   #calculateHeightShift(tabsContainer, selectedTabs) {
     let heightShift = 0;
     if (selectedTabs.length) {
@@ -1641,10 +1689,10 @@ class nsZenFolders extends nsZenDOMOperatedFeature {
     if (selectedTabs.length) {
       tabsContainer.removeAttribute("hidden");
     }
-    const collapsedHeight = this.#calculateHeightShift(
+    const startMargin = this.#settleAnimation(groupStart, "marginTop");
-      tabsContainer,
+    const collapsedHeight = selectedTabs.length
-      selectedTabs
+      ? 0
-    );
+      : this.#measureCollapsedShift(tabsContainer, groupStart);
 
     if (selectedTabs.length) {
       for (let i = 0; i < groupItems.length; i++) {
@@ -1697,10 +1745,10 @@ class nsZenFolders extends nsZenDOMOperatedFeature {
       ...this.#createAnimation(
         groupStart,
         {
-          marginTop: -(
+          marginTop: [
-            collapsedHeight +
+            startMargin,
-            4 * (selectedTabs.length === 0 ? 1 : 0)
+            -(collapsedHeight + 4 * (selectedTabs.length === 0 ? 1 : 0)),
-          ),
+          ],
         },
         { duration, ease: "easeInOut" }
       )
@@ -1709,16 +1757,15 @@ class nsZenFolders extends nsZenDOMOperatedFeature {
     gBrowser.tabContainer._invalidateCachedVisibleTabs();
     this.#animationCount += 1;
     await Promise.all(animations);
-    if (this.#animationCount) {
     this.#animationCount -= 1;
+    if (this.#animationCount || !group.collapsed) {
       return;
     }
-    // Prevent hiding if we spam the group animations
+    if (!selectedTabs.length) {
-    if (!selectedTabs.length && !this.#animationCount) {
       tabsContainer.setAttribute("hidden", true);
-    }
-
       this.styleCleanup(itemsToHide);
+      this.#queueCollapsedRelayout(group);
+    }
   }
 
   async animateExpand(group) {

src/zen/library/ZenLibraryWidget.sys.mjs

@@ -235,7 +235,31 @@ class ZenLibraryDownloadStack {
       .finally(() => download.target.refresh());
   }
 
+  /**
+   * @param {object} download
+   * @returns {boolean} Whether it will be opened as soon as it is here
+   */
+  #opensWhenDone(download) {
+    return !download.stopped && !!download.launchWhenSucceeded;
+  }
+
+  /**
+   * Clicking a download that is still coming in asks for it to be opened as
+   * soon as it is here, the way the downloads panel does.
+   *
+   * @param {object} download
+   */
+  #toggleOpenWhenDone(download) {
+    download.launchWhenSucceeded = !download.launchWhenSucceeded;
+    download._launchedFromPanel = download.launchWhenSucceeded;
+    this.#updateList();
+  }
+
   #openDownload(download) {
+    if (!download.stopped) {
+      this.#toggleOpenWhenDone(download);
+      return;
+    }
     if (download.succeeded) {
       lazy.DownloadsCommon.openDownload(download).catch(console.error);
     } else if (download.source?.url) {
@@ -274,14 +298,29 @@ class ZenLibraryDownloadStack {
       );
       entry.querySelector(".zen-library-download-list-title").textContent =
         this.#fileName(download);
-      entry.querySelector(".zen-library-download-list-subtitle").textContent =
+      const subtitle = entry.querySelector(
-        this.#statusText(download);
+        ".zen-library-download-list-subtitle"
+      );
+      if (this.#opensWhenDone(download)) {
+        this.#window.document.l10n.setAttributes(
+          subtitle,
+          "library-downloads-open-when-done"
+        );
+      } else {
+        subtitle.removeAttribute("data-l10n-id");
+        subtitle.textContent = this.#statusText(download);
+      }
       entry.toggleAttribute("downloading", !download.stopped);
+      entry.toggleAttribute("open-when-done", this.#opensWhenDone(download));
     });
+    this.#window
+      .promiseDocumentFlushed(() => this.#list.getBoundingClientRect().height)
+      .then(height => {
         this.#tabs?.style.setProperty(
           "--zen-library-stack-height",
-      `${this.#list.getBoundingClientRect().height}px`
+          `${height}px`
         );
+      });
   }
 
   #updateBadge(badge, download) {

src/zen/library/sections/ZenLibraryDownloadsSection.mjs

@@ -326,7 +326,34 @@ export class ZenLibraryDownloadsSection extends ZenLibrarySearchSection {
     lazy.DownloadsCommon.showDownloadedFile(this.#file(download));
   }
 
+  /**
+   * Whether a download that is still coming in will be opened the moment it
+   * finishes.
+   *
+   * @param {object} download
+   * @returns {boolean}
+   */
+  #opensWhenDone(download) {
+    return !download.stopped && !!download.launchWhenSucceeded;
+  }
+
+  /**
+   * Clicking a download that is still coming in asks for it to be opened as
+   * soon as it is here, the way the downloads panel does.
+   *
+   * @param {object} download
+   */
+  #toggleOpenWhenDone(download) {
+    download.launchWhenSucceeded = !download.launchWhenSucceeded;
+    download._launchedFromPanel = download.launchWhenSucceeded;
+    this.requestUpdate();
+  }
+
   #onRowClick(download) {
+    if (!download.stopped) {
+      this.#toggleOpenWhenDone(download);
+      return;
+    }
     if (!this.#hasFile(download)) {
       return;
     }
@@ -516,15 +543,22 @@ export class ZenLibraryDownloadsSection extends ZenLibrarySearchSection {
   // Rendering
 
   #renderSubtitle(download) {
-    const statusNode =
+    let statusNode;
-      download === this.#openingDownload
+    if (download === this.#openingDownload) {
-        ? html`<span
+      statusNode = html`<span
         class="zen-library-download-status"
         data-l10n-id="library-downloads-opening-in"
-          ></span>`
+      ></span>`;
-        : html`<span class="zen-library-download-status"
+    } else if (this.#opensWhenDone(download)) {
+      statusNode = html`<span
+        class="zen-library-download-status"
+        data-l10n-id="library-downloads-open-when-done"
+      ></span>`;
+    } else {
+      statusNode = html`<span class="zen-library-download-status"
         >${this.#statusText(download)}</span
       >`;
+    }
     return html`
       <span class="zen-library-row-subtitle">
         ${statusNode}
@@ -584,6 +618,7 @@ export class ZenLibraryDownloadsSection extends ZenLibrarySearchSection {
         ?pending=${pending}
         ?indeterminate=${pending && !download.hasProgress}
         ?paused=${pending && download.stopped}
+        ?open-when-done=${this.#opensWhenDone(download)}
         ?opening=${download === this.#openingDownload}
         @click=${() => this.#onRowClick(download)}
         @contextmenu=${event => {

src/zen/library/zen-library.css

@@ -882,6 +882,11 @@ zen-library:not([open]) :is(.zen-library-search-header, .zen-library-filter-head
   display: none;
 }
 
+.zen-library-row[pending][open-when-done]:not(:hover)
+  .zen-library-download-status {
+  display: inline;
+}
+
 .zen-library-row[pending]:not(:hover) .zen-library-row-subtitle::before {
   content: "";
   display: block;

src/zen/sessionstore/ZenSessionManager.sys.mjs

@@ -1006,6 +1006,9 @@ export class nsZenSessionManager {
     aWindow.gZenWorkspaces.restoreWorkspacesFromSessionStore({
       spaces: this.#sidebarWithoutCloning.spaces || [],
     });
+    // There is no restore coming for this window, so nothing else is going to
+    // tell the spaces their tabs are in place.
+    aWindow.gZenWorkspaces.onWindowRestored();
   }
 
   /**

src/zen/spaces/ZenSpaceIcons.mjs

@@ -133,11 +133,11 @@ class nsZenWorkspaceIcons extends MozXULElement {
 
   async #updateIcons() {
     const workspaces = gZenWorkspaces.getWorkspaces();
-    this.innerHTML = "";
+    const icons = document.createDocumentFragment();
     for (const workspace of workspaces) {
-      const button = this.#createWorkspaceIcon(workspace);
+      icons.appendChild(this.#createWorkspaceIcon(workspace));
-      this.appendChild(button);
     }
+    this.replaceChildren(icons);
     if (workspaces.length <= 1) {
       this.setAttribute("dont-show", "true");
     } else {
@@ -169,7 +169,7 @@ class nsZenWorkspaceIcons extends MozXULElement {
     for (const button of buttons) {
       if (button.getAttribute("zen-workspace-id") == uuid) {
         selected = i;
-      } else {
+      } else if (button.hasAttribute("active")) {
         button.removeAttribute("active");
       }
       i++;

src/zen/spaces/ZenSpaceManager.mjs

@@ -76,16 +76,6 @@ class nsZenWorkspaces {
     this._resolveInitialized = resolve;
   });
 
-  async #waitForPromises() {
-    if (this.privateWindowOrDisabled) {
-      return;
-    }
-    await Promise.all([
-      this.promisePinnedInitialized,
-      SessionStore.promiseAllWindowsRestored,
-    ]);
-  }
-
   async init() {
     // Initialize workspace change mutex
     this._workspaceChangeInProgress = false;
@@ -152,8 +142,9 @@ class nsZenWorkspaces {
     this.addPopupListeners();
 
     if (this.privateWindowOrDisabled) {
-      await this.#waitForPromises();
+      await delayedStartupPromise;
-      await this.restoreWorkspacesFromSessionStore({});
+      this.restoreWorkspacesFromSessionStore({});
+      await this.onWindowRestored();
     }
 
     if (!this.privateWindowOrDisabled) {
@@ -300,6 +291,9 @@ class nsZenWorkspaces {
       inBackground: true,
       userContextId: 0,
       _forZenEmptyTab: true,
+      skipAnimation: true,
+      skipBackgroundNotify: true,
+      bulkOrderedOpen: true,
     });
   }
 
@@ -371,39 +365,27 @@ class nsZenWorkspaces {
       "tabbrowser-arrowscrollbox-periphery"
     );
     perifery.setAttribute("hidden", "true");
-    const tabs = gBrowser.tabContainer.allTabs;
+    const markupTabs = gBrowser.tabContainer.allTabs;
     const workspaces = this.getWorkspaces();
+    const spaceElements = document.createDocumentFragment();
     for (const workspace of workspaces) {
-      this.#createWorkspaceTabsSection(workspace, tabs);
+      spaceElements.appendChild(this.#createWorkspaceElement(workspace));
-    }
-    if (tabs.length) {
-      const defaultSelectedContainer = this.workspaceElement(
-        this.activeWorkspace
-      )?.querySelector(".zen-workspace-normal-tabs-section");
-      const pinnedContainer = this.workspaceElement(
-        this.activeWorkspace
-      )?.querySelector(".zen-workspace-pinned-tabs-section");
-      // New profile with no workspaces does not have a default selected container
-      if (defaultSelectedContainer) {
-        for (const tab of tabs) {
-          if (tab.hasAttribute("zen-essential")) {
-            this.getEssentialsSection(tab).appendChild(tab);
-            continue;
-          } else if (tab.pinned) {
-            pinnedContainer.insertBefore(tab, pinnedContainer.lastChild);
-            continue;
-          }
-          // before to the last child (perifery)
-          defaultSelectedContainer.insertBefore(
-            tab,
-            defaultSelectedContainer.lastChild
-          );
     }
+    document
+      .getElementById("tabbrowser-arrowscrollbox")
+      .appendChild(spaceElements);
+    this._hasInitializedTabsStrip = true;
+    for (const tab of markupTabs) {
+      // Routes into the active space's strip now that one exists.
+      gBrowser.tabContainer.appendChild(tab);
     }
+    if (markupTabs.length) {
       gBrowser.tabContainer._invalidateCachedTabs();
     }
+    for (const workspace of workspaces) {
+      this.workspaceElement(workspace.uuid)?.checkPinsExistence();
+    }
     perifery.setAttribute("hidden", "true");
-    this._hasInitializedTabsStrip = true;
     this._fixIndicatorsNames(workspaces);
   }
 
@@ -455,15 +437,20 @@ class nsZenWorkspaces {
     return this.getEssentialsSection(this.getCurrentSpaceContainerId());
   }
 
-  #createWorkspaceTabsSection(workspace, tabs = []) {
+  #createWorkspaceElement(workspace) {
     const workspaceWrapper = document.createXULElement("zen-workspace");
-    const container = document.getElementById("tabbrowser-arrowscrollbox");
     workspaceWrapper.id = workspace.uuid;
     if (this.activeWorkspace === workspace.uuid) {
       workspaceWrapper.active = true;
     }
+    return workspaceWrapper;
+  }
 
-    container.appendChild(workspaceWrapper);
+  #createWorkspaceTabsSection(workspace, tabs = []) {
+    const workspaceWrapper = this.#createWorkspaceElement(workspace);
+    document
+      .getElementById("tabbrowser-arrowscrollbox")
+      .appendChild(workspaceWrapper);
     this.#organizeTabsToWorkspaceSections(workspace, workspaceWrapper, tabs);
     workspaceWrapper.checkPinsExistence();
   }
@@ -512,6 +499,85 @@ class nsZenWorkspaces {
     }
   }
 
+  /** @type {Map<Element, DocumentFragment>|null} */
+  #sessionRestoreFragments = null;
+
+  get canCollectSessionRestoreFragments() {
+    return (
+      this._hasInitializedTabsStrip &&
+      !!this.activeWorkspaceElement?.tabsContainer
+    );
+  }
+
+  beginSessionRestoreFragments() {
+    this.#sessionRestoreFragments = new Map();
+  }
+
+  /**
+   * @param {object} aTabData
+   *        Session store data of the tab, or of the first tab of the folder,
+   *        that is about to be inserted.
+   * @returns {DocumentFragment} The fragment for the section it belongs to.
+   */
+  getSessionRestoreFragment(aTabData) {
+    const container = this.#sessionRestoreContainer(aTabData);
+    let fragment = this.#sessionRestoreFragments.get(container);
+    if (!fragment) {
+      fragment = document.createDocumentFragment();
+      this.#sessionRestoreFragments.set(container, fragment);
+    }
+    return fragment;
+  }
+
+  /**
+   * Inserts every collected fragment into its section, one insertion per
+   * section instead of one move per restored tab.
+   */
+  flushSessionRestoreFragments() {
+    if (!this.#sessionRestoreFragments) {
+      return;
+    }
+    const filledSpaces = new Set();
+    for (const [container, fragment] of this.#sessionRestoreFragments) {
+      container.insertBefore(fragment, this.#sessionRestoreAnchor(container));
+      const spaceElement = container.closest("zen-workspace");
+      if (spaceElement) {
+        filledSpaces.add(spaceElement);
+      }
+    }
+    this.#sessionRestoreFragments = null;
+    for (const spaceElement of filledSpaces) {
+      spaceElement.checkPinsExistence();
+    }
+    gBrowser.tabContainer._invalidateCachedTabs();
+  }
+
+  #sessionRestoreContainer(aTabData) {
+    if (aTabData.zenEssential) {
+      return this.getEssentialsSection(aTabData.userContextId);
+    }
+    let spaceElement = this.workspaceElement(aTabData.zenWorkspace);
+    if (!spaceElement?.tabsContainer) {
+      // The space is gone, or the tab never had one. Keep it in the active
+      // space, #clearAnyZombieTabs takes care of it later on if need be.
+      spaceElement = this.activeWorkspaceElement;
+    }
+    return aTabData.pinned
+      ? spaceElement.pinnedTabsContainer
+      : spaceElement.tabsContainer;
+  }
+
+  #sessionRestoreAnchor(aContainer) {
+    // Essentials are shared between spaces, so a restore only ever adds to
+    // what is already there. Every other section gets the restored tabs in
+    // front of whatever the window started with, which is the tab the startup
+    // page opened with and which belongs at the end.
+    if (aContainer.classList.contains("zen-essentials-container")) {
+      return null;
+    }
+    return aContainer.firstChild;
+  }
+
   initializeWorkspaceNavigation() {
     this.#setupAppCommandHandlers();
     this.#setupSidebarHandlers();
@@ -796,14 +862,33 @@ class nsZenWorkspaces {
       console.error("gZenWorkspaces: Error initializing theme picker", e);
     }
     this.#initializeTabsStripSections();
+    return this.promiseInitialized;
+  }
+
+  #hasFinishedInitialization = false;
+
+  async onWindowRestored() {
+    if (this.#hasFinishedInitialization || !this.workspaceEnabled) {
+      return;
+    }
+    this.#hasFinishedInitialization = true;
+    const activeWorkspace = this.getActiveWorkspace();
+    if (!this.privateWindowOrDisabled) {
+      await this.promisePinnedInitialized;
+    }
     this.#initializeEmptyTab();
-    return (async () => {
-      await this.#waitForPromises();
     this.#afterLoadInit();
     await this.#initializeWorkspaceBookmarks();
     await this.changeWorkspace(activeWorkspace, { onInit: true });
     this.#fixTabPositions();
     this.onWindowResize();
+    // The spaces hold their tabs now, so the tab the user is waiting for can
+    // be selected without waiting on anything else.
+    try {
+      await this.selectStartPage();
+    } catch (e) {
+      console.error("gZenWorkspaces: Error selecting the start page", e);
+    }
     this._resolveInitialized();
     this.#clearAnyZombieTabs(); // Dont call with await
     delete this._resolveInitialized;
@@ -823,14 +908,22 @@ class nsZenWorkspaces {
     );
 
     this.updateWorkspacesChangeContextMenu();
-    })();
   }
 
   async selectStartPage() {
-    if (!this.workspaceEnabled || gZenUIManager.testingEnabled) {
+    if (
+      !this.workspaceEnabled ||
+      gZenUIManager.testingEnabled ||
+      this.#hasSelectedStartPage
+    ) {
       return;
     }
-    await this.promiseInitialized;
+    // #hasInitialized only goes up once the whole init promise settles, so a
+    // second restore arriving before that would otherwise run this again.
+    this.#hasSelectedStartPage = true;
+    // _handleURIToLoad selects the tab it loads the startup URI into, so
+    // picking ours before delayed startup is done just gets overwritten.
+    await delayedStartupPromise;
     let resolveSelectPromise;
     let selectPromise = new Promise(resolve => {
       resolveSelectPromise = resolve;
@@ -921,8 +1014,12 @@ class nsZenWorkspaces {
 
     // Wait for the next event loop to ensure that the startup focus logic by
     // firefox has finished doing it's thing.
-    setTimeout(() => {
+    const focusTimer = setTimeout(() => {
-      if (document.documentElement.hasAttribute("zen-welcome-stage")) {
+      if (
+        window.closed ||
+        !window.docShell ||
+        document.documentElement.hasAttribute("zen-welcome-stage")
+      ) {
         return;
       }
       if (gZenVerticalTabsManager._canReplaceNewTab && shownEmptyTab) {
@@ -933,6 +1030,11 @@ class nsZenWorkspaces {
         gBrowser.selectedBrowser.focus();
       }
     });
+    // A window torn down before this runs would leave the focus work in
+    // flight against a destroyed urlbar.
+    window.addEventListener("unload", () => clearTimeout(focusTimer), {
+      once: true,
+    });
 
     if (
       !gZenVerticalTabsManager._canReplaceNewTab &&
@@ -961,6 +1063,8 @@ class nsZenWorkspaces {
     );
   }
 
+  #hasSelectedStartPage = false;
+
   handleInitialTab(tab, isEmpty) {
     if (gZenUIManager.testingEnabled || !this.workspaceEnabled) {
       return;
@@ -2552,7 +2656,9 @@ class nsZenWorkspaces {
   #createWorkspaceData(name, icon, containerTabId = 0) {
     if (!this.currentWindowIsSyncing) {
       containerTabId =
-        parseInt(gBrowser.selectedTab.getAttribute("usercontextid")) || 0;
+        parseInt(
+          globalThis.gBrowser?.selectedTab?.getAttribute("usercontextid")
+        ) || 0;
       let label =
         ContextualIdentityService.getUserContextLabel(containerTabId) ||
         "Default";

src/zen/tabs/ZenPinnedTabManager.mjs

@@ -145,10 +145,6 @@ class nsZenPinnedTabManager extends nsZenDOMOperatedFeature {
       return;
     }
     const tab = event.target;
-    if (this._ignoreNextTabPinnedEvent) {
-      delete this._ignoreNextTabPinnedEvent;
-      return;
-    }
     switch (action) {
       case "TabPinned":
         tab._zenClickEventListener = this._zenClickEventListener;
@@ -558,7 +554,6 @@ class nsZenPinnedTabManager extends nsZenDOMOperatedFeature {
         });
       } else {
         gBrowser.pinTab(tab);
-        this._ignoreNextTabPinnedEvent = true;
       }
       tab.setAttribute("zenDefaultUserContextId", true);
       if (tab.selected) {

src/zen/tests/folders/browser.toml

@@ -20,6 +20,8 @@ support-files = [
 
 ["browser_folder_issue_9981.js"]
 
+["browser_folder_issue_15522.js"]
+
 ["browser_folder_level_checks.js"]
 
 ["browser_folder_max_subfolders.js"]

src/zen/tests/folders/browser_folder_issue_15522.js

@@ -0,0 +1,64 @@
+/* Any copyright is dedicated to the Public Domain.
+   https://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TOGGLE_DELAY = 90;
+
+function folderHeight(folder) {
+  return folder.getBoundingClientRect().height;
+}
+
+async function waitForFolderSettled(folder, message) {
+  let previous = null;
+  await TestUtils.waitForCondition(() => {
+    const height = folderHeight(folder);
+    const settled = previous !== null && Math.abs(height - previous) < 1;
+    previous = height;
+    return settled;
+  }, message);
+}
+
+add_task(async function test_Issue_15522() {
+  const tab1 = BrowserTestUtils.addTab(gBrowser, "about:blank");
+  const tab2 = BrowserTestUtils.addTab(gBrowser, "about:blank");
+  const folder = await gZenFolders.createFolder([tab1, tab2], {
+    renameFolder: false,
+    label: "folder",
+  });
+  await waitForFolderSettled(folder, "Folder should be done opening");
+  const expandedHeight = folderHeight(folder);
+
+  folder.collapsed = true;
+  await waitForFolderSettled(folder, "Folder should be done collapsing");
+  const collapsedHeight = folderHeight(folder);
+  Assert.less(
+    collapsedHeight,
+    expandedHeight,
+    "Collapsing the folder should hide its tabs"
+  );
+
+  folder.collapsed = false;
+  await waitForFolderSettled(folder, "Folder should be done expanding");
+  Assert.lessOrEqual(
+    Math.abs(folderHeight(folder) - expandedHeight),
+    1,
+    "Expanding the folder should show its tabs again"
+  );
+
+  folder.collapsed = true;
+  await new Promise(resolve => setTimeout(resolve, TOGGLE_DELAY));
+  folder.collapsed = false;
+  await new Promise(resolve => setTimeout(resolve, TOGGLE_DELAY));
+  folder.collapsed = true;
+
+  await waitForFolderSettled(folder, "Folder should be done collapsing");
+  ok(folder.collapsed, "Folder should be collapsed after spamming toggles");
+  Assert.lessOrEqual(
+    Math.abs(folderHeight(folder) - collapsedHeight),
+    1,
+    "Folder should be fully collapsed instead of stuck half open"
+  );
+
+  await removeFolder(folder);
+});

src/zen/tests/ub-actions/browser_ub_actions_search.js

@@ -5,6 +5,8 @@
 
 ChromeUtils.defineESModuleGetters(this, {
   globalActions: "resource:///modules/ZenUBGlobalActions.sys.mjs",
+  SessionStore: "resource:///modules/sessionstore/SessionStore.sys.mjs",
+  TabStateFlusher: "resource:///modules/sessionstore/TabStateFlusher.sys.mjs",
   UrlbarTestUtils: "resource://testing-common/UrlbarTestUtils.sys.mjs",
 });
 
@@ -37,3 +39,29 @@ add_task(async function test_Ub_Actions_Search() {
     );
   }
 });
+
+add_task(async function test_Ub_Actions_Exact_Match_Ranks_First() {
+  // With a closed tab in history, "Reopen Closed Tab" is available too, and it
+  // contains "close tab". The exact label must still be the first action.
+  const tab = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    "https://example.com"
+  );
+  await TabStateFlusher.flush(tab.linkedBrowser);
+  BrowserTestUtils.removeTab(tab);
+  await TestUtils.waitForCondition(
+    () => SessionStore.getClosedTabCount(window) > 0,
+    "Waiting for the closed tab to be recorded"
+  );
+
+  const closeTab = globalActions.find(a => a.command === "cmd_close");
+  await UrlbarTestUtils.promiseAutocompleteResultPopup({
+    window,
+    waitForFocus,
+    value: closeTab.label,
+  });
+  let { result } = await UrlbarTestUtils.getRowAt(window, 1);
+  Assert.equal(result.providerName, "ZenUrlbarProviderGlobalActions");
+  Assert.equal(result.payload.title, closeTab.label);
+  SessionStore.forgetClosedTab(window, 0);
+});

src/zen/urlbar/ZenUBActionsProvider.sys.mjs

@@ -18,6 +18,13 @@ const MAX_RECENT_ACTIONS = 5;
 const MINIMUM_QUERY_SCORE = 92;
 const MINIMUM_PREFIXED_QUERY_SCORE = 30;
 
+// Exact and prefix matches must outrank any fuzzy match. The fuzzy score grows
+// quadratically with a run of consecutive matches, so a longer label that merely
+// contains the query ("Reopen Closed Tab" for "close tab") could beat the label
+// that is exactly the query.
+const EXACT_MATCH_SCORE = 1_000_000;
+const PREFIX_MATCH_SCORE = 100_000;
+
 ChromeUtils.defineESModuleGetters(lazy, {
   UrlbarResult: "chrome://browser/content/urlbar/UrlbarResult.mjs",
   BrowserWindowTracker: "resource:///modules/BrowserWindowTracker.sys.mjs",
@@ -298,11 +305,11 @@ export class ZenUrlbarProviderGlobalActions extends UrlbarProvider {
     }
     // 1. Exact match gets the highest score.
     if (targetLower === queryLower) {
-      return 200;
+      return EXACT_MATCH_SCORE;
     }
     // 2. Exact prefix matches are heavily prioritized.
     if (targetLower.startsWith(queryLower)) {
-      return 100 + queryLen;
+      return PREFIX_MATCH_SCORE + queryLen;
     }
     let score = 0;
     let queryIndex = 0;