Mozilla Firefox is a free, open source, cross-platform, graphical web browser developed by the Mozilla Corporation and hundreds of volunteers.
Beginning as a fork of the browser component (Navigator) of the Mozilla Application Suite, Firefox has since become the Mozilla Foundation's main development focus, replacing the Mozilla Suite. Firefox is officially abbreviated as Fx but the common abbreviation is FF.
Before the November 9, 2004 1.0 release, Firefox had already gained acclaim from numerous media outlets, including Forbes and the Wall Street Journal.
With over 25 million downloads in the 99 days after the initial 1.0 release, Firefox became one of the most downloaded free and open source applications, especially among home users.
The Wikipedia entry for GPU can be found here
Find out why you might want to consider Firefox or an alternative browser to Internet Explorer with this Videocast from Twisted Tech