Sample code for extension manager

extension_manager.js

/*
 * Kosei Moriyama <cou929@gmail.com>
 * 
 * Sample code for Firefox Extension.
 * Get installed extension data using extensionsManager.
 * List of attributes of extension data (returned value of getItemList()):
 * http://www.oxymoronical.com/experiments/apidocs/interface/nsIUpdateItem
 */

var extensionsManager = Components.classes["@mozilla.org/extensions/manager;1"]
  .getService(Components.interfaces.nsIExtensionManager);
var itemsList = extensionsManager.getItemList(2, {});
for (var i=0; i<itemsList.length; i++) {
  Application.console.log(itemsList[i].name);  // show name of installed extension
}