text: messenger.WindowListener.registerChromeUrl([ 
      ["content", "emoji",           "chrome/content/"],
      ["locale",  "emoji", "en-US",  "chrome/locale/en-US/"],
      ["locale",  "emoji", "de-DE",     "chrome/locale/de-DE/"]
  ]);
  messenger.WindowListener.registerWindow(
      "chrome://messenger/content/messenger.xhtml", 
      "chrome://emoji/content/messenger.js");
  messenger.WindowListener.registerWindow(
      "chrome://messenger/content/messengercompose/messengercompose.xhtml", 
      "chrome://emoji/content/messengercompose.js");
  messenger.WindowListener.registerWindow(
      "chrome://messenger/content/customizeToolbar.xhtml",
      "chrome://emoji/content/customizeToolbar.js");
  messenger.WindowListener.registerShutdownScript("chrome://emoji/content/shutdown.js");
  messenger.WindowListener.startListening();
  