Add to 
Cybernetnews write about 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!
From: SeeJay [via:Cybernetnews]
Written by 
wrote, on April 12th, 2007
This can be another great prank I agree. Your victim will never know what hit him.
wrote, on April 12th, 2007
I used it with my browser…it didnt worked for me ,can anyone help me
wrote, on April 13th, 2007
Vikram: Try opening a new Firefox Window and then fill the address bar
wrote, on April 13th, 2007
Hehe, found a lot of similar hacks and how to open them.
my god there’s a goldmine of super cool hacks
A simple example:
chrome://browser/content/pageInfo.xul
wrote, on April 13th, 2007
What is the point of this?
wrote, on April 13th, 2007
Hey! I tried this trick, but to another wonder lol, even the buttons on my Google Toolbar doubled (some tripled). Here’s a screenshot:
http://img251.imageshack.us/im.....absre2.png
wrote, on October 12th, 2007
tnx for this but wondering what is the point.. tnx for the screenshot