diff --git a/browser/components/extensions/parent/ext-browser.js b/browser/components/extensions/parent/ext-browser.js
index aca5a23deda6b0f2316b0e108cff20ffd7feda67..a06c90937f97a4994b0807b54984089dbe627a71 100644
--- a/browser/components/extensions/parent/ext-browser.js
+++ b/browser/components/extensions/parent/ext-browser.js
@@ -352,6 +352,7 @@ class TabTracker extends TabTrackerBase {
   }
 
   getId(nativeTab) {
+    if (nativeTab.hasAttribute("zen-empty-tab")) return -1;
     let id = this._tabs.get(nativeTab);
     if (id) {
       return id;
@@ -386,6 +387,7 @@ class TabTracker extends TabTrackerBase {
     if (nativeTab.documentGlobal.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) {
@@ -1276,6 +1278,10 @@ 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.documentGlobal)) {
       return false;