diff --git a/src/drivers/webextension/js/lib/iframe.js b/src/drivers/webextension/js/lib/iframe.js
index 8a1b322fe..651e9e547 100644
--- a/src/drivers/webextension/js/lib/iframe.js
+++ b/src/drivers/webextension/js/lib/iframe.js
@@ -139,7 +139,7 @@
             } else {
               elseCallback();
             }
-          },
+          }
         );
       },
     };