diff --git a/browser/components/extensions/parent/ext-tabs.js b/browser/components/extensions/parent/ext-tabs.js
index 636e0f8cd1d489658833cf101152576e9fdb52af..e7578a059504b89a852061be037c323a107fe5ce 100644
--- a/browser/components/extensions/parent/ext-tabs.js
+++ b/browser/components/extensions/parent/ext-tabs.js
@@ -514,6 +514,7 @@ this.tabs = class extends ExtensionAPIPersistent {
         }
 
         let tab = tabManager.getWrapper(updatedTab);
+        if (!tab) return;
 
         let changeInfo = {};
         for (let prop of needed) {
@@ -883,6 +884,7 @@ this.tabs = class extends ExtensionAPIPersistent {
               });
             }
 
+            window.gZenCompactModeManager._nextTimeWillBeActive = active;
             let nativeTab = window.gBrowser.addTab(url, options);
 
             if (active) {