rem: return nsJSComponentManager.getService("component: 
add: return nsJSComponentManager.getService("@mozilla.org/preferences;1", "nsIPref"); 
context:   get mPrefService()    {      return nsJSComponentManager.getService("component://netscape/preferences", "nsIPref");    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/6cc70ebd6c97bd0b2fe48c31f579e855387ced9d/nsUserSettings.js/clean/xpfe/global/resources/content/nsUserSettings.js