Thanks sttroopers for posting this on our forum.
The Mozilla Firebird project is a redesign of Mozilla's browser component, written using the XUL user interface language and designed to be cross-platform.
This release features a fresh new look designed by Arvid Axelsson, a redesigned preferences window, preliminary support for Mac OS X and much more.
News source: Firebird website
Download: Firebird 0.6 Windows
Download: Firebird 0.6 Linux
Download: Firebird 0.6 Mac
View: Release notes