diff --git a/browser/components/extensions/parent/ext-browser.js b/browser/components/extensions/parent/ext-browser.js
index 2488267f4be5142bcacf984635d9e9ecdb5f02e9..03127808b3cae28850cc276fac0f1acbca85d326 100644
--- a/browser/components/extensions/parent/ext-browser.js
+++ b/browser/components/extensions/parent/ext-browser.js
@@ -354,6 +354,7 @@ class TabTracker extends TabTrackerBase {
   }
 
   getId(nativeTab) {
+    if (nativeTab.hasAttribute("zen-empty-tab")) return -1;
     let id = this._tabs.get(nativeTab);
     if (id) {
       return id;
@@ -388,6 +389,7 @@ class TabTracker extends TabTrackerBase {
     if (nativeTab.ownerGlobal.closed) {
       throw new Error("Cannot attach ID to a tab in a closed window.");
     }
+    if (nativeTab.hasAttribute("zen-empty-tab")) return;
 
     this._tabs.set(nativeTab, id);
     if (nativeTab.linkedBrowser) {
@@ -1273,6 +1275,10 @@ class TabManager extends TabManagerBase {
   }
 
   canAccessTab(nativeTab) {
+    if (nativeTab.hasAttribute("zen-empty-tab")) {
+      return false
+    }
+
     // Check private browsing access at browser window level.
     if (!this.extension.canAccessWindow(nativeTab.ownerGlobal)) {
       return false;