Stun your friends using Firefox

This is a cool Firefox cheat which would possibly stun your friends by embedding a Firefox window within a Firefox Window. Just enter this code into your Firefox address bar and hit Enter:

chrome://browser/content/browser.xul

I tried it on my browser, it looked awesome, but the performance of the browser was not upto the mark. Anyways, who cares? You could try sneaking into your friend’s browser and setting the above address as his homepage, it will surely drive him nuts!