rem: prefs.SetBoolPref("browser.download.progressDnldDialog.keepAlive", keepProgressWindowUpBox.checked); 
add: prefs.setBoolPref("browser.download.progressDnldDialog.keepAlive", keepProgressWindowUpBox.checked); 
context: function onUnload(){  // remember the user's decision for the checkbox.  var prefs = Components.classes[prefContractID].getService(Components.interfaces.nsIPref);  if (prefs)    prefs.SetBoolPref("browser.download.progressDnldDialog.keepAlive", keepProgressWindowUpBox.checked);   // Cancel app launcher.   if (helperAppLoader)   {     try     {       helperAppLoader.closeProgressWindow();       helperAppLoader = null;     }     catch( exception ) {}   }}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/faf03ce445712b372523f881cc3144cfadc7a611/helperAppDldProgress.js/buggy/xpfe/components/ucth/resources/helperAppDldProgress.js