Issue 4580 - Replace ext.i18n with i18n

lib/filterComposer.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 149 matching lines @@
       // Add an element hiding filter for each generated CSS selector
       for (let selector of selectors)
         filters.push(docDomain.replace(/^www\./, "") + "##" + selector);
     }
   }
 
   return {filters, selectors};
 }
 
 let contextMenuItem = {
-  title: ext.i18n.getMessage("block_element"),
+  title: chrome.i18n.getMessage("block_element"),
   contexts: ["image", "video", "audio"],
   onclick(page)
   {
     page.sendMessage({type: "composer.content.contextMenuClicked"});
   }
 };
 
 function updateContextMenu(page, filter)
 {
   page.contextMenus.remove(contextMenuItem);
@@ skipping 82 matching lines @@
 
 port.on("composer.quoteCSS", (message, sender) =>
 {
   return quoteCSS(message.CSS);
 });
 
 ext.pages.onLoading.addListener(page =>
 {
   page.sendMessage({type: "composer.content.finished"});
 });