Thanks for the tip Rutilus
Mozilla has officially released the first public alpha build of Firefox 3.0.
Codenamed Gran Paradiso, Firefox 3 includes the new Gecko 1.9 rendering
engine which leverages the open-source Cairo rendering framework and
features heavily refactored reflow algorithms that improve Firefox layout
functionality and resolve some long-standing CSS bugs.

A First Look:
http://arstechnica.com/news.ars/post/20061212-8409.html

Download Link:
http://releases.mozilla.org/pub/mozilla.org/firefox/releases/granparadiso/alpha1/
http://releases.mozilla.org/pub/mozilla.org/firefox/releases/granparadiso/alpha1/win32/en-US/Gran%20Paradiso%20Setup%20Alpha%201.exe