Index: ext/content.js
===================================================================
--- a/ext/content.js
+++ b/ext/content.js
@@ -10,17 +10,16 @@
 {
   // Listen for messages from the background page.
   browser.runtime.onMessage.addListener((message, sender, sendResponse) =>
   {
     return ext.onMessage._dispatch(message, {}, sendResponse).includes(true);
   });
 }
 
-(function()
 {
   let port = null;
 
   ext.onExtensionUnloaded = {
     addListener(listener)
     {
       if (!port)
         port = browser.runtime.connect();
@@ -38,9 +37,9 @@
         if (!port.onDisconnect.hasListeners())
         {
           port.disconnect();
           port = null;
         }
       }
     }
   };
-}());
+}