rem:  var button = aEvent.target._menubuttonParent; if (!button.disabled) gClickAndHoldTimer = setTimeout(ClickAndHoldMouseDownCallback, 500, button); 
add: gClickAndHoldTimer = setTimeout(ClickAndHoldMouseDownCallback, 500, aEvent.currentTarget); 
context: function ClickAndHoldMouseDown(aEvent){ if (aEvent.button != 0 || aEvent.target.getAttribute("anonid") != "button")   return; // relying on button.xml#menu-button-base internals for improved theme compatibility var button = aEvent.target._menubuttonParent; if (!button.disabled)   gClickAndHoldTimer = setTimeout(ClickAndHoldMouseDownCallback, 500, button);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/b6abc0241cc67d42af49c52160ba4c6af920cc36/browser.js/buggy/browser/base/content/browser.js