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Firefox

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"Firefox" redirects here. For other uses, see Firefox (disambiguation).
Mozilla Firefox
Original author(s)Mozilla Corporation
Developer(s)Mozilla Corporation
Mozilla Foundation
Initial releaseNovember 9, 2004 (2004-11-09)
Stable release
Standard134.0[1] Edit this on Wikidata / January 7, 2025; 1 day ago (January 7, 2025)
Extended support release 1128.6.0esr[2] Edit this on Wikidata / January 7, 2025; 1 day ago (January 7, 2025)
Extended support release 2115.19.0esr[3] / January 7, 2025; 1 day ago (2025-01-07)
Preview release
Beta & developer edition135.0b1[4] Edit this on Wikidata / January 7, 2025; 1 day ago (January 7, 2025)
Nightly136.0a1[5] Edit this on Wikidata / January 6, 2025; 2 days ago (January 6, 2025)
Repository
Written inC++, XUL, XBL, JavaScript,[6] CSS[7][8]
Engine
  • Gecko
  • Quantum
  • SpiderMonkey
Edit this at Wikidata
Operating systemCross-platform
Size7.2 MB (Windows)
17.2 MB (Mac OS X)
8.7 MB (Linux)
(all archived)
Available inOver 45 languages
TypeWeb browser
FTP client
gopher client
LicenseMPL/GNU GPL/GNU LGPL/Mozilla EULA (for binary redistribution)
Websitehttp://www.firefox.com/
http://www.mozilla.com/firefox

Mozilla Firefox is a web browser descended from the Mozilla Application Suite and managed by Mozilla Corporation. Official versions are distributed[9] under the terms of the proprietary EULA[10]. Firefox had 21.73% of the recorded usage share of web browsers as of February 2009, making it the second-most popular browser in current use worldwide, after Internet Explorer.[11]

To display web pages, Firefox uses the Gecko layout engine, which implements some current web standards plus a few features which are intended to anticipate likely additions to the standards.[12]

Firefox includes tabbed browsing, a spell checker, incremental find, live bookmarking, a download manager, and an integrated search system that uses the user's desired search engine (Google by default in most localizations). Functions can be added through add-ons created by third-party developers,[13] the most popular of which include the NoScript JavaScript disabling utility, Tab Mix Plus customizer, FoxyTunes media player control toolbar, Adblock Plus ad blocking utility, StumbleUpon (website discovery), Foxmarks Bookmark Synchronizer (bookmark synchronizer), WOT: Web of Trust security site advisor, DownThemAll! download enhancer, and Web Developer toolbar.<ref>[https://addo

  1. ^ "Firefox 134.0, See All New Features, Updates and Fixes". 7 January 2025. Retrieved 7 January 2025.
  2. ^ "Firefox ESR 128.6.0, See All New Features, Updates and Fixes". 7 January 2025. Retrieved 7 January 2025.
  3. ^ "Firefox ESR 115.19.0, See All New Features, Updates and Fixes". mozilla.org. 7 January 2025. Retrieved 7 January 2025.
  4. ^ "Firefox Beta 135.0beta, See All New Features, Updates and Fixes". 7 January 2025. Retrieved 7 January 2025.
  5. ^ "Firefox Nightly 136.0a1, See All New Features, Updates and Fixes". 6 January 2025. Retrieved 7 January 2025.
  6. ^ Firefox's addons are written in JavaScript.
  7. ^ Firefox uses an "html.css" stylesheet for default rendering styles.
  8. ^ The Firefox addon, Stylish takes advantage of Firefox's CSS rendering to change the appearance of Firefox.
  9. ^ "Mozilla Licensing Policies". mozilla.org. Retrieved 2009-03-08.
  10. ^ Cite error: The named reference mozeula was invoked but never defined (see the help page).
  11. ^ "Top Browser Market Share for November, 2008". Net Applications. Retrieved 2009-03-02.
  12. ^ "Gecko Layout Engine". 2009. Retrieved 2009-16-02. {{cite web}}: Check date values in: |accessdate= (help)
  13. ^ addons.mozilla.org Browse all Extensions page
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