diff --git a/src/zen/drag-and-drop/ZenDragAndDrop.js b/src/zen/drag-and-drop/ZenDragAndDrop.js
index 94b90cdd0..cda496779 100644
--- a/src/zen/drag-and-drop/ZenDragAndDrop.js
+++ b/src/zen/drag-and-drop/ZenDragAndDrop.js
@@ -678,6 +678,7 @@
         clientX < 0 || clientX > innerWidth || clientY < 0 || clientY > innerHeight;
       if (isOutOfWindow && !this.#isOutOfWindow) {
         this.#isOutOfWindow = true;
+        gZenViewSplitter.onBrowserDragEndToSplit(event, true);
         this.#maybeClearVerticalPinnedGridDragOver();
         this.clearSpaceSwitchTimer();
         this.clearDragOverVisuals();
@@ -716,20 +717,22 @@
       const dt = event.dataTransfer;
       const activeWorkspace = gZenWorkspaces.activeWorkspace;
       let draggedTab = dt.mozGetDataAt(TAB_DROP_TYPE, 0);
-      if (
-        isTab(draggedTab) &&
-        !draggedTab.hasAttribute("zen-essential") &&
-        draggedTab.getAttribute("zen-workspace-id") != activeWorkspace
-      ) {
-        const movingTabs = draggedTab._dragData?.movingTabs || [draggedTab];
-        for (let tab of movingTabs) {
-          tab.setAttribute("zen-workspace-id", activeWorkspace);
+      if (draggedTab.ownerGlobal === window) {
+        if (
+          isTab(draggedTab) &&
+          !draggedTab.hasAttribute("zen-essential") &&
+          draggedTab.getAttribute("zen-workspace-id") != activeWorkspace
+        ) {
+          const movingTabs = draggedTab._dragData?.movingTabs || [draggedTab];
+          for (let tab of movingTabs) {
+            tab.setAttribute("zen-workspace-id", activeWorkspace);
+          }
+          gBrowser.selectedTab = draggedTab;
+        }
+        if (isTabGroupLabel(draggedTab)) {
+          draggedTab = draggedTab.group;
+          gZenFolders.changeFolderToSpace(draggedTab, activeWorkspace, { hasDndSwitch: true });
         }
-        gBrowser.selectedTab = draggedTab;
-      }
-      if (isTabGroupLabel(draggedTab)) {
-        draggedTab = draggedTab.group;
-        gZenFolders.changeFolderToSpace(draggedTab, activeWorkspace, { hasDndSwitch: true });
       }
       gZenWorkspaces.updateTabsContainers();
     }
diff --git a/src/zen/sessionstore/ZenSessionManager.sys.mjs b/src/zen/sessionstore/ZenSessionManager.sys.mjs
index 15e410856..323b5872a 100644
--- a/src/zen/sessionstore/ZenSessionManager.sys.mjs
+++ b/src/zen/sessionstore/ZenSessionManager.sys.mjs
@@ -151,6 +151,19 @@ export class nsZenSessionManager {
         folderIcon: row.getResultByName("folder_icon"),
         isFolderCollapsed: Boolean(row.getResultByName("is_folder_collapsed")),
       }));
+      try {
+        data.recoveryData = await IOUtils.readJSON(
+          PathUtils.join(
+            Services.dirsvc.get("ProfD", Ci.nsIFile).path,
+            "sessionstore-backups",
+            "recovery.jsonlz4"
+          ),
+          { decompress: true }
+        );
+        this.log("Recovered recovery data from sessionstore-backups");
+      } catch {
+        /* ignore errors reading recovery data */
+      }
       this._migrationData = data;
     } catch {
       /* ignore errors during migration */
@@ -298,6 +311,11 @@ export class nsZenSessionManager {
       initialState?.lastSessionState,
       this._migrationData
     );
+    if (!initialState?.windows?.length && this._migrationData?.recoveryData) {
+      this.log("Using recovery data for migration");
+      initialState = this._migrationData.recoveryData;
+    }
+    delete this._migrationData?.recoveryData;
     // Restore spaces into the sidebar object if we don't
     // have any yet.
     if (!this.#sidebar.spaces?.length) {
diff --git a/surfer.json b/surfer.json
index f9e77fd9c..5f1d833d3 100644
--- a/surfer.json
+++ b/surfer.json
@@ -20,7 +20,7 @@
       "brandShortName": "Zen",
       "brandFullName": "Zen Browser",
       "release": {
-        "displayVersion": "1.18.2b",
+        "displayVersion": "1.18.3b",
         "github": {
           "repo": "zen-browser/desktop"
         },