rem: this.mPrefService.SetBoolPref(aPrefName, aPrefValue); 
add: this.mPrefService.setBoolPref(aPrefName, aPrefValue); 
context:   setBoolPref: function (aPrefName, aPrefValue)    {      try         {          this.mPrefService.SetBoolPref(aPrefName, aPrefValue);        }      catch(e)        {        }    },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/faf03ce445712b372523f881cc3144cfadc7a611/nsUserSettings.js/buggy/xpfe/global/resources/content/nsUserSettings.js