add: element.setAttribute("updateStatus", getExtensionString("updatingMsg")); 
context:   onAddonUpdateStarted: function(addon) {    var element = document.getElementById(PREFIX_ITEM_URI + addon.id);    element.setAttribute("loading", "true");  },
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/e70cc1872d3fa7a9c82c261be41c9d7d67b9d270/extensions.js/clean/toolkit/mozapps/extensions/content/extensions.js