rem: return false; 
add: return false; 
context:     shouldShowSeparator : function ( aSeparatorID )    {      var separator = document.getElementById(aSeparatorID);      if (separator) {        var sibling = separator.previousSibling;        while (sibling && sibling.localName != "menuseparator") {          if (sibling.getAttribute("hidden") != "true")            return true;          sibling = sibling.previousSibling;        }      }      return false;      }
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/2fb9feaadc992e3ccd442db789244b253d0427f8/browser.js/buggy/browser/base/content/browser.js