Firefox inside of Firefox

I heard about this crazy little trick for Firefox on Thursday's (04/12/07) episode of Buzz Out Loud.

It's Firefox inside of Firefox.
(The link will send you to a blog post with all of the details)

Basically a certain URL will open a new tab with firefox inside it... and you can keep going.

I'll try to get an insane screenshot up here when I get the chance!

Enjoy!