rem: this.Sanitizer.onShutdown(); 
add:   const appStartup = Components.classes['@mozilla.org/toolkit/app-startup;1'] .getService(Components.interfaces.nsIAppStartup); try { appStartup.enterLastWindowClosingSurvivalArea();  this.Sanitizer.onShutdown();  } catch(ex) { } finally { appStartup.exitLastWindowClosingSurvivalArea(); } 
context:   _onProfileShutdown: function()   {    this.Sanitizer.onShutdown();  },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/8528195ece87f700aa1ec91454074a0234655ac5/nsBrowserGlue.js/clean/browser/components/nsBrowserGlue.js