Mozilla Firefox

Mozilla Firefox is a graphical web browser developed by the Mozilla Corporation, and a large community of external contributors. Firefox, officially abbreviated as Fx or fx and popularly abbreviated FF, started as a fork of the Navigator browser component of the Wikipedia:Wikipedia:Mozilla Application Suite. Firefox has replaced the Mozilla Suite as the flagship product of the Mozilla project, under the direction of the Mozilla Foundation.

Mozilla Firefox is a cross-platform browser, providing support for various versions of Microsoft Windows, Mac OS X, and Linux. However, the source code has been unofficially ported to other operating systems, including FreeBSD, OS/2, Solaris, RISC OS, SkyOS, BeOS and more recently, Windows XP Professional x64 Edition.

Firefox's source code is available under the terms of the Mozilla tri-license as free and open source software.