diff --git a/src/content/notificationBar.js b/src/content/notificationBar.js
index f4711e3fe6..e4a71c6fb1 100644
--- a/src/content/notificationBar.js
+++ b/src/content/notificationBar.js
@@ -104,7 +104,7 @@
                 }
             });
 
-            observer.observe(bodies[0], { childList: true });
+            observer.observe(bodies[0], { childList: true, subtree: true });
         }
     }