rem:  this.toggleAutoFillInURLBar(); 
add:  this.toggleAutoHideTabbar(); 
context:   observe: function (aSubject, aTopic, aPrefName)  {    if (aTopic != "nsPref:changed" || aPrefName != this.domain)      return;          this.toggleAutoFillInURLBar();  },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/08dbdb9883d79870ca27d68a45982e01dc8d8725/browser.js/clean/browser/base/content/browser.js