add:   if (this.mInitialized) return; this.mInitialized = true; 
context:   onProfileStartup: function(aProfileName)  {    debug("onProfileStartup");    // now wait for the first app window to open    var observerService = Components.      classes["@mozilla.org/observer-service;1"].      getService(Components.interfaces.nsIObserverService);    observerService.addObserver(this, "domwindowopened", false);  },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/6045670115869877847cbcfacf942753059dac1e/nsUpdateNotifier.js/clean/xpfe/components/updates/src/nsUpdateNotifier.js