Issue 4580 - Replace ext.getURL with extension.getURL

lib/notificationHelper.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 171 matching lines @@
 {
   if (activeNotification && activeNotification.id == notification.id)
     return;
 
   activeNotification = notification;
   if (shouldDisplay("notification", activeNotification.type))
   {
     let texts = NotificationStorage.getLocalizedTexts(notification);
     let title = texts.title || "";
     let message = (texts.message || "").replace(/<\/?(a|strong)>/g, "");
-    let iconUrl = ext.getURL("icons/detailed/abp-128.png");
+    let iconUrl = chrome.extension.getURL("icons/detailed/abp-128.png");
     let linkCount = (activeNotification.links || []).length;
 
     if ("notifications" in chrome)
     {
       activeButtons = getNotificationButtons(activeNotification.type,
                                              texts.message);
       chrome.notifications.create("", {
         type: "basic",
         title,
         iconUrl,
@@ skipping 72 matching lines @@
   let methods = displayMethods[notificationType] || defaultDisplayMethods;
   return methods.includes(method);
 };
 
 ext.pages.onLoading.addListener(page =>
 {
   NotificationStorage.showNext(stringifyURL(page.url));
 });
 
 NotificationStorage.addShowListener(showNotification);