--- a/toolkit/components/extensions/ExtensionCommon.jsm
+++ b/toolkit/components/extensions/ExtensionCommon.jsm
@@ -173,18 +173,18 @@ class BaseContext {
           this.contentWindow = null;
           this.active = false;
         }
       },
     };
 
     this.contentWindow = contentWindow;
     this.active = true;
-    contentWindow.addEventListener("pagehide", handler, {mozSystemGroup: true});
-    contentWindow.addEventListener("pageshow", handler, {mozSystemGroup: true});
+    contentWindow.addEventListener("pagehide", handler, {mozSystemGroup: true}, false);
+    contentWindow.addEventListener("pageshow", handler, {mozSystemGroup: true}, false);
     this.callOnClose({
       close: () => {
         if (isValidInnerWindow()) {
           contentWindow.removeEventListener("pagehide", handler, {mozSystemGroup: true});
           contentWindow.removeEventListener("pageshow", handler, {mozSystemGroup: true});
         }
         // Replace handler to release the original handleEvent closure.
         handler.handleEvent = function(event) {