Firefox in Firefox

Have anyone wondered if someone could run a browser within a browser? It can be done in firefox and it's a pretty good trick.
type "chrome://browser/content/browser.xul" in the address bar and hit ENTER.

See what you get!




Actually, what happens is that one instance of firefox in run within another and so on. Now, an infinite number of intances can be run within one browser. But it's cool trick but of no use to anyone.