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Mozilla Firefox v2.0.0.11

Mozilla Firefox v3.5(beta 4)

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Original author(s)	Mozilla Corporation
Developer(s)	Mozilla Corporation Mozilla Foundation
Initial release	9 November 2004 (2004-11-09)
Stable release	3.6.9  (7 September 2010; 4 days ago (2010-09-07)) [+/−]
Preview release	4.0 Beta 5  (7 September 2010; 4 days ago (2010-09-07))[2] [+/−]
Written in	C++, JavaScript,[3] CSS,[4][5] XUL, XBL
Operating system	Windows Mac OS X Linux BSD Solaris OpenSolaris GNU AmigaOS 4
Engine	Gecko
Available in	75 languages
Development status	Active
Type	Web browser FTP client Gopher client
License	Since version 3.0.6: MPL/GNU GPL/GNU LGPL, version 3.0.5 and Earlier executable code version Mozilla Firefox EULA 1.0/1.1, version 3.0.5 and Earlier source code version of certain Firefox functionality: MPL[6][7]
Website	www.firefox.com

Mozilla Firefox is a free and open source web browser descended from the Mozilla Application Suite and managed by Mozilla Corporation. As of August 2010^[update], Firefox was the second most widely used browser, with 22.93% of worldwide usage share of web browsers, according to Net Applications.^[8] Other sources put Firefox's usage share between 20% and 32%.^[9][10][11]

To display web pages, Firefox uses the Gecko layout engine, which implements most current web standards in addition to several features which are intended to anticipate likely additions to the standards.^[12]

The latest Firefox features^[13] include tabbed browsing, spell checking, incremental find, live bookmarking, a download manager, private browsing, location-aware browsing (also known as "geolocation") based exclusively on a Google service^[14] and an integrated search system that uses Google by default in most localizations. Functions can be added through extensions, created by third-party developers,^[15] of which there is a wide selection, a feature that has attracted many of Firefox's users.

Firefox runs on various versions of GNU/Linux, Mac OS X, Microsoft Windows and many other Unix-like operating systems. Its current stable release is version 3.6.9, released on September 7, 2010^[update].^[16] Firefox's source code is free software, released under a tri-license GNU GPL/GNU LGPL/MPL.^[17]