Firefox release history

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This is the release history of Mozilla Firefox.

Mozilla Firefox timeline[edit]


Current and future releases[edit]

Current supported official releases[edit]

  • Firefox 31.3.0 ESR
  • Firefox 34.0.5/34.0

Current supported test releases[edit]

  • Firefox 35.0 Beta
  • Firefox 36.0 Developer Edition
  • Firefox 37.0 Nightly

Future official releases[edit]

  • Firefox 35.0
  • Firefox 36.0
  • Firefox 37.0
  • Firefox 38.0
  • Firefox 39.0
  • Firefox 40.0
  • Firefox 41.0

Future test releases[edit]

  • Firefox 36.0 Beta
  • Firefox 37.0 Developer Edition
  • Firefox 37.0 Beta
  • Firefox 38.0 Developer Edition
  • Firefox 38.0 Beta
  • Firefox 39.0 Nightly
  • Firefox 39.0 Developer Edition
  • Firefox 39.0 Beta
  • Firefox 40.0 Nightly
  • Firefox 40.0 Developer Edition
  • Firefox 40.0 Beta
  • Firefox 41.0 Nightly
  • Firefox 41.0 Developer Edition
  • Firefox 41.0 Beta
  • Firefox 42.0 Nightly
  • Firefox 42.0 Developer Edition
  • Firefox 42.0 Beta
  • Firefox 43.0 Nightly
  • Firefox 43.0 Developer Edition
  • Firefox 43.0 Beta
  • Firefox 44.0 Nightly
  • Firefox 44.0 Developer Edition
  • Firefox 45.0 Nightly

Release history[edit]

Note: Dates in the future indicate a scheduled release date; they are subject to change in the event of unanticipated complications.

Color Meaning
Green Current supported official release
Blue Future official release
Gold Former release; still supported
Red Former release; no longer supported
Yellow Current supported test release
Purple Future test release
Pink Former test release; no longer supported

Release history
Browser name Gecko version Version Codename Release date[1] Significant changes
Phoenix 1.2 0.1 Pescadero September 23, 2002 First release. Customizable toolbar, quicksearch.[2]
0.2 Santa Cruz October 1, 2002 Sidebar, extension management.[3]
0.3 Lucia October 14, 2002 Image blocking, pop-up blocking whitelist, tabbed browsing.[4]
1.3 0.4 Oceano October 19, 2002 Themes, pop-up blocking improvements, toolbar customization.[5]
0.5 Naples December 7, 2002 Multiple homepages, sidebar and accessibility improvements.[6]
Firebird 1.5 0.6 Glendale May 17, 2003 New default theme (Qute), bookmark and privacy improvements, smooth scrolling, automatic image resizing.[7]
0.6.1 July 28, 2003 Bugfix release.[8]
0.7 Indio October 15, 2003 Automatic scrolling, password manager, preferences panel improvements.[9]
0.7.1 Three Kings October 26, 2003 Bugfix release (Mac OS X only).[10]
Firefox 1.6 0.8 Royal Oak February 9, 2004 Windows installer, offline working, bookmarks and download manager improvements, rebranded with new logo.[11]
1.7 0.9 One Tree Hill June 15, 2004 New default theme (Winstripe), comprehensive data migration, new extension/theme manager, reduced download size, new help system, Linux installer, mail icon (Windows only).[12]
0.9.1 June 28, 2004 Bugfix release, updated default theme.[13]
0.9.2 July 8, 2004 Vulnerability patch (Windows only).[13]
0.9.3 August 4, 2004 Vulnerability patch.[14]
0.10 Firefox 1.0
Preview Release
"Greenlane"
September 14, 2004 Bugs with higher complexity/risk, localization impact, RSS/Atom feed support, find toolbar, plugin finder.[15]
0.10.1 October 1, 2004 Vulnerability patch.[16]
Firefox 1 1.0 RC1 Firefox 1.0
Release Candidate 1
"Mission Bay"
October 27, 2004 First Firefox release candidate.
1.0 RC2 Firefox 1.0
Release Candidate 2
"Whangamata"
November 3, 2004 Second Firefox release candidate.
1.0 Firefox 1.0
"Phoenix"
November 9, 2004 Official version 1.0 release. Official localized builds.[17]
1.0.1 Rose & Crown February 24, 2005 Regular security and stability update.[18]
1.0.2 March 23, 2005 Regular security and stability update.[19]
1.0.3 April 15, 2005 Regular security and stability update. Installer improvements.[20]
1.0.4 May 11, 2005 Regular security and stability update. Fix to DHTML errors encountered at some web sites.[21]
1.0.5 July 12, 2005 Regular security and stability update.[22]
1.0.6 July 19, 2005 Off-cycle stability update. Restored API compatibility for extensions and web applications that did not work in Firefox 1.0.5.[23]
1.0.7 September 20, 2005 Regular security and stability update.[24]
1.0.8 April 13, 2006 Regular security and stability update.[25]

End-of-life 1.0.x product line

Firefox 1.5 1.8 1.1a1 Deer Park Alpha 1
"Strippenkaart"
May 31, 2005 First Firefox 1.1 alpha release. Support for SVG and canvas. "Sanitize" privacy feature. Improvements in JavaScript 1.5 and CSS 2/3. Broken website reporter tool.[26]
1.1a2 Deer Park Alpha 2 July 12, 2005 Second Firefox 1.1 alpha release. Blazing fast backwards and forwards (FastBack), drag-and-drop tab reordering, improved pop-up blocking, error pages instead of error dialogs.[27]
1.5b1 Firefox 1.5 Beta 1 September 9, 2005 First Firefox 1.5 beta release. New update system (binary patch). Prettier error pages, more Luna-like Winstripe theme (did not blend well with the Classic theme).[28]
1.5b2 Firefox 1.5 Beta 2 October 6, 2005 Second Firefox 1.5 beta release. Improvements to automated update system, website rendering and performance. Several security fixes.[29]
1.5 RC1 Firefox 1.5
Release Candidate 1
November 1, 2005 First Firefox 1.5 release candidate.
1.5 RC2 Firefox 1.5
Release Candidate 2
November 10, 2005 Second Firefox 1.5 release candidate.
1.5 RC3 Firefox 1.5
Release Candidate 3
November 17, 2005 Third Firefox 1.5 release candidate.
1.5 Firefox 1.5
"Deer Park"
November 29, 2005 Official version 1.5 release. Official localized builds. Identical to 1.5 RC3.[30]
1.5.0.1 February 1, 2006 Regular security and stability update.[31]
1.5.0.2 April 13, 2006 Regular security and stability update. Native support for Intel-based Macintosh computers by shipping universal binary.[32]
1.5.0.3 May 2, 2006 Off-cycle security update. Fix for a publicly disclosed denial of service weakness.[33]
1.5.0.4 June 1, 2006 Regular security and stability update.[34]
1.5.0.5 July 26, 2006 Regular security and stability update. Added changes for Frisian locale (fy-NL).[35]
1.5.0.6 August 2, 2006 Off-cycle security and stability update. Fixed an issue with playing Windows Media content introduced by previous update.[36]
1.5.0.7 September 14, 2006 Regular security and stability update.[37]
1.5.0.8 November 7, 2006 Regular security and stability update.[38]
1.5.0.9 December 19, 2006 Regular security and stability update.[39]
1.5.0.10 February 23, 2007 Regular security and stability update.[40]
1.5.0.11 March 20, 2007 Regular security and stability update. Regression fixes.[41]
1.5.0.12 May 30, 2007 Regular security and stability update.[42]

End-of-life 1.5.0.x product line

Firefox 2 1.8.1 2.0a1 Bon Echo Alpha 1 March 22, 2006 First Firefox 2.0 alpha release.[43]
2.0a2 Bon Echo Alpha 2 May 12, 2006 Second Firefox 2.0 alpha release. Links default to open in new tab. Close button on every tab. Inline spell checking for text boxes. Session restoration after browser crash. Search suggestion for Google and Yahoo!. New search plugin manager and add-on manager. Web feed previewing. Bookmark microsummaries. Updates to extension system. Support for Sherlock and OpenSearch. Support for SVG text using svg:textPath.[44]
2.0a3 Bon Echo Alpha 3 May 26, 2006 Third Firefox 2.0 alpha release. Anti-phishing protection. Search suggestions appear with search history in the search box for Google and Yahoo!. Support for client-side session and persistent storage.[45]
2.0b1 Firefox 2.0 Beta 1 July 12, 2006 First Firefox 2.0 beta release. Improved feed support. New NSIS-based installer. JavaScript 1.7. Enhanced security and localization support for extensions.[46]
2.0b2 Firefox 2.0 Beta 2 August 31, 2006 Second Firefox 2.0 beta release. New Winstripe theme refresh: new navigation icons, URL bar refresh (new Go button attached to the URL bar), Search bar refresh, Tab bar refresh, Alltabs button (used to view a popup list of all tabs open).[47]
2.0 RC1 Firefox 2.0
Release Candidate 1
September 26, 2006 First Firefox 2.0 release candidate.[48]
2.0 RC2 Firefox 2.0
Release Candidate 2
October 6, 2006 Second Firefox 2.0 release candidate.[49]
2.0 RC3 Firefox 2.0
Release Candidate 3
October 16, 2006 Third Firefox 2.0 release candidate.[50]
2.0 Firefox 2.0
"Bon Echo"
October 24, 2006 Official version 2.0 release, identical to 2.0 RC3. Official localized builds.[51]
2.0.0.1 December 19, 2006 Regular security and stability update.[52]
2.0.0.2 February 23, 2007 Regular security and stability update.[53]
2.0.0.3 March 20, 2007 Regular security and stability update. Regression fixes and security fixes.[54]
2.0.0.4 May 30, 2007 Regular security and stability update.[55]
2.0.0.5 July 17, 2007 Security and stability update.[56]
2.0.0.6 July 30, 2007 Regular security and stability update.[57]
2.0.0.7 September 18, 2007 Off-cycle security update.[58]
2.0.0.8 October 18, 2007 Regular security and stability update. Mac OS X 10.5 support.[59]
2.0.0.9 November 1, 2007 Off-cycle security and stability update.[60]
2.0.0.10 November 26, 2007 Off-cycle security and stability update.[61]
2.0.0.11 November 30, 2007 Off-cycle stability update.[62]
2.0.0.12 February 7, 2008 Regular security and stability update.[63]
2.0.0.13 March 25, 2008 Regular security and stability update.[64]
2.0.0.14 April 16, 2008 Off-cycle stability update.[65]
2.0.0.15 July 1, 2008 Regular security and stability update.[66]
2.0.0.16 July 15, 2008 Off-cycle security update.[67]
2.0.0.17 September 23, 2008 Regular security and stability update.[68]
2.0.0.18 November 12, 2008 Regular security and stability update.[69]
2.0.0.19 December 16, 2008 Regular security and stability update.[70]
2.0.0.20 December 18, 2008 Off-cycle security update.[71]

End-of-life 2.0.0.x product line

Firefox 3 1.9 3.0a1 Gran Paradiso Alpha 1 December 8, 2006 First Firefox 3.0 alpha release. Cairo graphics library. Cocoa Widgets in OS X builds. Updated threading model. Changes to how DOM events are dispatched, how HTML object elements are loaded, and how web pages are painted. New SVG elements and filters, and improved SVG specification compliance. Windows 95, 98, ME and Mac OS X v10.2 no longer supported. Moving DOM nodes between documents require a call to importNode or adoptNode as per the DOM specification.[72]
3.0a2 Gran Paradiso Alpha 2 February 7, 2007 Second Firefox 3.0 alpha release. Reflow refactoring (leading to Acid2 test compliance) among numerous layout bug fixes. Web Apps 1.0 API for changing stylesheets support. Inline-block and inline-table values of CSS 2.1's display property implemented. XML documents can be rendered during download. Greatly improved Mac widgets support since Alpha 1. Improvements in Cairo graphics layer. Non-standard JavaScript "Script" object no longer supported.[73]
3.0a3 Gran Paradiso Alpha 3 March 23, 2007 Third Firefox 3.0 alpha release. Support for allowing web pages to store resources in the browser's offline cache. Support for Animated PNG images. Support for the "HTTPOnly" cookie extension which provides enhanced cookie privacy (also backported to Firefox 2.0.0.5). Improvements to layout and scaling precision across numerous screen and printer resolutions.[74]
3.0a4 Gran Paradiso Alpha 4 April 27, 2007 Fourth Firefox 3.0 alpha release. Adding of FUEL JavaScript library for extension developers. Rewrite of Page Info dialog. Upgrade to Cairo 1.4.2. More Cocoa regression fixes.[75]
3.0a5 Gran Paradiso Alpha 5 June 6, 2007 Fifth Firefox 3.0 alpha release. Places (bookmark and history service based on SQLite) used by default, but no front-end changes. Breakpad used as crash reporter on Windows and Mac OS X, superseding closed-source Talkback. Password manager rewrite. Support for Growl and native widgets within forms for Mac OS X.[76]
3.0a6 Gran Paradiso Alpha 6 July 2, 2007 Sixth Firefox 3.0 alpha release. Upgrade of SQLite to version 3.3.17, leading to increased cookie performance due to transition of cookie service to SQLite. Site-specific preference service, used initially for text zoom, allowing zoom setting to remain on each website. Support for native widgets within forms for Linux. New Quit dialog handles multiple windows more elegantly and allows users to save session. Autoscroll rewrite: numerous bug fixes and significant performance gain. Fixes to the use of units within the download manager. Various Places bug fixes.[77]
3.0a7 Gran Paradiso Alpha 7 August 3, 2007 Seventh Firefox 3.0 alpha release. More APIs implemented from WHATWG specs, such as ability to read files from file selection fields without need to upload and cut/copy/paste events, and cross-site XMLHttpRequest. New protocol-handling dialog. Experimental full-page zoom support, but no UI to control it. Numerous Mac OS X bug fixes, but Mac OS X 10.3 no longer supported for Gecko 1.9. General bug fixes.[78]
3.0a8 Gran Paradiso Alpha 8 September 20, 2007 Eighth Firefox 3.0 alpha release. New, basic UI for tagging bookmarks. Remember password prompt changed to non-modal information bar. Malware blacklist support. New UI for FTP and File protocol listings. Applications pane added to preferences. Basic support for web-based protocol handlers.[79]
3.0b1 Firefox 3.0 Beta 1 November 19, 2007 First Firefox 3.0 beta release.[80]
3.0b2 Firefox 3.0 Beta 2 December 18, 2007 Second Firefox 3.0 beta release. New UI improvements, including redesigned location bar, Places Organizer, Smart Bookmarks. Various stability and performance improvements.[81]
3.0b3 Firefox 3.0 Beta 3 February 12, 2008 Third Firefox 3.0 beta release. New UI improvements, including redesigned buttons and location bar. Different default native themes for each operating system. Upgraded to SQLite 3.5.4. Various stability and performance improvements.[82]
3.0b4 Firefox 3.0 Beta 4 March 10, 2008 Fourth Firefox 3.0 beta release. New UI improvement, including improved default themes for different operating systems. Various improvements in speed and resource usage.[83]
3.0b5 Firefox 3.0 Beta 5 April 2, 2008 Fifth Firefox 3.0 beta release. Further improved themes to match various operating systems, JavaScript engine optimizations for speed, improved Places organizer.[84]
3.0 RC1 Firefox 3.0
Release Candidate 1
May 16, 2008 First Firefox 3.0 release candidate.[85]
3.0 RC2 Firefox 3.0
Release Candidate 2
June 5, 2008 Second Firefox 3.0 release candidate.[86]
3.0 RC3 Firefox 3.0
Release Candidate 3
June 11, 2008 Third Firefox 3.0 release candidate.[87]
3.0 Firefox 3.0
"Gran Paradiso"
June 17, 2008 Official version 3.0 release.[88]
3.0.1 July 16, 2008 Security and stability update.[89]
3.0.2 September 23, 2008 Regular security and stability update.[90]
3.0.3 September 26, 2008 Bug fix for retrieving and saving passwords.[91]
3.0.4 November 12, 2008 Regular security and stability update.[92]
3.0.5 December 16, 2008 Regular security and stability update.[93]
3.0.6 February 3, 2009 Regular security and stability update.[94]
3.0.7 March 4, 2009 Regular security and stability update.[95]
3.0.8 March 27, 2009 Off-cycle security update.[96]
3.0.9 April 21, 2009 Regular security and stability update.[97]
3.0.10 April 27, 2009 Off-cycle stability update.[98]
3.0.11 June 11, 2009 Regular security and stability update.[99]
3.0.12 July 21, 2009 Regular security and stability update.[100]
3.0.13 August 3, 2009 Regular security and stability update.[101]
3.0.14 September 9, 2009 Regular security and stability update.[102]
3.0.15 October 27, 2009 Regular security and stability update.[103]
3.0.16 December 15, 2009 Regular security and stability update.[104]
3.0.17 January 5, 2010 Off-cycle stability update.[105]
3.0.18 February 17, 2010 Regular security and stability update.[106]
3.0.19 March 30, 2010 Regular security and stability update.[107]

End-of-life 3.0.x product line

Firefox 3.5 1.9.1 3.1a1 Shiretoko Alpha 1 July 28, 2008 First Firefox 3.1 alpha release. Web standards improvements. Text API for the <canvas> element. Support for using border images. Support for DOM query selectors. Improvements to Smart Location Bar. New tab-switching behavior.[108]
3.1a2 Shiretoko Alpha 2 September 5, 2008 Second Firefox 3.1 alpha release.[109]
3.1b1 Firefox 3.1 Beta 1 October 14, 2008 First Firefox 3.1 beta release. Web standards improvements in Gecko layout engine. Added support for CSS 2.1 and CSS 3 properties. New tab-switching shortcut that shows previews of the tab user is switching to. Improved control over Smart Location Bar using special characters to restrict your search. Support for new web technologies.[clarification needed][110]
3.1b2 Firefox 3.1 Beta 2 December 8, 2008 Second Firefox 3.1 beta release. Available in 54 languages. Added new Private Browsing Mode. Added functions to facilitate clearing recent history by time as well as to remove all traces of a website. New support for web worker threads. New TraceMonkey JavaScript engine on by default for web content. Improvements to Gecko layout engine, including speculative parsing for faster content rendering. Removed new tab-switching behavior based on user feedback. Support for new web technologies.[clarification needed][111]
3.1b3 Firefox 3.1 Beta 3 March 12, 2009 Third Firefox 3.1 beta release. Available in 64 languages. Improved new Private Browsing Mode. Improvements to web worker thread support. Improved performance and stability with the TraceMonkey JavaScript engine. New native JSON support. Improvements to Gecko layout engine, including speculative parsing for faster content rendering. Support for new web technologies such as <video> and <audio> elements, W3C Geolocation API, JavaScript query selectors, CSS 2.1 and 3 properties, SVG transforms and offline applications.[112]
3.5b4 Firefox 3.5 Beta 4 April 27, 2009 First Firefox 3.5 beta release. Available in 70 languages. Improved tools for controlling private data, including Private Browsing Mode. Better performance and stability with new TraceMonkey JavaScript engine. Ability to provide Location Aware Browsing using web standards for geolocation. Support for native JSON, and web worker threads. Improvements to Gecko layout engine, including speculative parsing for faster content rendering. Support for new web technologies such as HTML5 <video> and <audio> elements, downloadable fonts and other new CSS properties, JavaScript query selectors, HTML5 offline data storage for applications, and SVG transforms.[113]
3.5b99 Firefox 3.5 Preview June 8, 2009 Preview for Firefox 3.5, pre-release candidate.[114]
3.5 RC1 Firefox 3.5
Release Candidate 1
June 16, 2009 First Firefox 3.5 release candidate.[115]
3.5 RC2 Firefox 3.5
Release Candidate 2
June 19, 2009 Second Firefox 3.5 release candidate.[116]
3.5 RC3 Firefox 3.5
Release Candidate 3
June 24, 2009 Third Firefox 3.5 release candidate.[117]
3.5 Firefox 3.5
"Shiretoko"
June 30, 2009 Official version 3.5 release. Identical to 3.5 RC3.[118]
3.5.1 July 16, 2009 Off-cycle security and stability update.[119]
3.5.2 August 3, 2009 Regular security and stability update.[120]
3.5.3 September 9, 2009 Regular security and stability update.[121]
3.5.4 October 27, 2009 Regular security and stability update.[122]
3.5.5 November 5, 2009 Off-cycle security and stability update.[123]
3.5.6 December 15, 2009 Regular security and stability update.[124]
3.5.7 January 5, 2010 Off-cycle stability update.[125]
3.5.8 February 17, 2010 Regular security and stability update.[126]
3.5.9 March 30, 2010 Regular security and stability update.[127]
3.5.10 June 22, 2010 Regular security and stability update.[128]
3.5.11 July 20, 2010 Regular security and stability update.[129]
3.5.12 September 7, 2010 Regular security and stability update.[130]
3.5.13 September 15, 2010 Off-cycle stability update.[131]
3.5.14 October 19, 2010 Regular security and stability update.[132]
3.5.15 October 27, 2010 Off-cycle security update.[133]
3.5.16 December 9, 2010 Regular security and stability update.[134]
3.5.17 March 1, 2011 Regular security and stability update.[135]
3.5.18 March 22, 2011 Off-cycle security update. Blacklists a few invalid HTTPS certificates.[136]
3.5.19 April 28, 2011 Regular security and stability update.[137]

End-of-life 3.5.x product line

Firefox 3.6 1.9.2 3.6a1 Namoroka Alpha 1 August 7, 2009 First Firefox 3.6 alpha release. Compositor (Phase 1), which moves Gecko to using one native widget per top-level content document. A new focus model. The chromedir attribute has been replaced with a pseudoclass. Several new CSS3 properties including background size and gradients for background images. Speed improvements to the TraceMonkey JavaScript engine. Startup and responsiveness improvements throughout the application.[138]
3.6b1 Firefox 3.6 Beta 1 October 30, 2009 First Firefox 3.6 beta release. Users can now change their browser’s appearance with a single click, with built in support for Personas. Firefox 3.6 will alert users about out of date plugins to keep them safe. Open, native video can now be displayed full screen, and supports poster frames. Support for the WOFF font format. Improved JavaScript performance, overall browser responsiveness and startup time. Support for new CSS, DOM and HTML5 web technologies.[139]
3.6b2 Firefox 3.6 Beta 2 November 10, 2009 Second Firefox 3.6 beta release. A mechanism to prevent incompatible software from crashing Firefox.[140]
3.6b3 Firefox 3.6 Beta 3 November 17, 2009 Third Firefox 3.6 beta release. A change to how third-party software integrates with Firefox to increase stability. The ability to run scripts asynchronously to speed up page load times.[141]
3.6b4 Firefox 3.6 Beta 4 November 26, 2009 Fourth Firefox 3.6 beta release. Added support for the HTML5 File API.[142]
3.6b5 Firefox 3.6 Beta 5 December 17, 2009 Fifth Firefox 3.6 beta release.[143]
3.6 RC1 Firefox 3.6
Release Candidate 1
January 8, 2010 First Firefox 3.6 release candidate.[144]
3.6 RC2 Firefox 3.6
Release Candidate 2
January 17, 2010 Second Firefox 3.6 release candidate.[145]
3.6 Firefox 3.6
"Namoroka"
January 21, 2010 Official Firefox 3.6 release. Identical to 3.6 RC2.[146]
3.6.2[t 1] March 22, 2010 Security and stability update.[147]
3.6.3 April 1, 2010 Quick turn-around security update.[148]
3.6.3plugin1 Firefox 3.6.3plugin1
"Lorentz"
April 8, 2010 First Firefox "Lorentz" beta, followed by 7 more Firefox 3.6.4 pre-release builds, all codenamed "Lorentz".[149]
3.6.4 Firefox 3.6.4 (OOPP)
"Lorentz"
June 22, 2010 Regular security and stability update, including OOPP.[150]
3.6.6[t 2] June 26, 2010 Off-cycle stability update. Modified crash protection feature to increase amount of time plugins allowed to be non-responsive before being terminated.[151]
3.6.7 July 20, 2010 Regular security and stability update.[152]
3.6.8 July 23, 2010 Off-cycle stability update.[153]
3.6.9 September 7, 2010 Regular security and stability update. Also added support for X-FRAME-OPTIONS HTTP response header to help prevent clickjacking and removed option to enable experimental HTML5 parser via user preference html5.enable in about:config.[154]
3.6.10 September 15, 2010 Off-cycle stability update.[155]
3.6.11 October 19, 2010 Regular security and stability update.[156]
3.6.12 October 27, 2010 Off-cycle security update.[157]
3.6.13 December 9, 2010 Regular security and stability update.[158]
3.6.14 March 1, 2011 Regular security and stability update.[159]
3.6.15 March 4, 2011 Off-cycle stability update. Fixed issue where some Java applets failed to load in Firefox 3.6.14.[160]
3.6.16 March 22, 2011 Off-cycle security update. Blacklisted several invalid HTTPS certificates.[161]
3.6.17 April 28, 2011 Regular security and stability update.[162]
3.6.18 June 21, 2011 Regular security and stability update.[163]
3.6.19 July 11, 2011 Off-cycle stability update. Turned off downloadable font support for users running Mac OS X 10.7 due to an underlying platform bug. No changes made on Windows side.[164]
3.6.20 August 16, 2011 Regular security and stability update.[165]
3.6.21 August 30, 2011 Off-cycle security update. Blacklisted a compromised HTTPS certificate.[166]
3.6.22 September 6, 2011 Off-cycle security update.[167]
3.6.23 September 27, 2011 Regular security and stability update.[168]
3.6.24 November 8, 2011 Regular security and stability update.[169]
3.6.25 December 20, 2011 Regular security and stability update.[170]
3.6.26 January 31, 2012 Regular security and stability update.[171]
3.6.27 February 17, 2012 Off-cycle security update.[172]
3.6.28 March 13, 2012 Regular security and stability update.[173]

End-of-life 3.6.x product line on April 24, 2012

Firefox 4 1.9.3 3.7a1 Mozilla Developer Preview 3.7 Alpha 1 February 10, 2010 First Firefox 3.7 alpha release. Support for WebGL(Disabled by default, but can be enabled by changing a preference). Support for new CSS, DOM and HTML5 web technologies.[174]
3.7a2 Mozilla Developer Preview 3.7 Alpha 2 March 3, 2010 Second Firefox 3.7 alpha release. On Windows and Linux, plugins (such as Flash and Silverlight) are now isolated from Firefox. Plugin crashes will not kill Firefox itself, and unresponsive plugins are automatically restarted. The SSL security system has been changed to fix a renegotiation flaw. Link history lookup is now performed asynchronously on a thread. Loading the HTML5 specification no longer causes very long browser pauses. Some JavaScript engine improvements. The stop and reload buttons have been merged when they are adjacent on the toolbar. More performance and stability improvements.[175]
3.7a3 Mozilla Developer Preview 3.7 Alpha 3 March 17, 2010 Third Firefox 3.7 alpha release. An experimental Direct2D rendering backend on Windows is available, turned off by default. Significant API improvements are available for JS-ctypes. Mozilla now uses an infallible allocator. Additional fixes for multi-process plugins.[176]
3.7a4 Mozilla Developer Preview 3.7 Alpha 4 April 12, 2010 Fourth Firefox 3.7 alpha release. CSS :visited selectors have been changed to block ways that websites can quickly check a user's browsing history. Currently loaded web pages are shown in the location bar autocomplete list, allowing switching to existing tabs. The beta version of Adobe Flash is now run in a separate process on Mac OS X Snow Leopard (10.6). Full-screen video on Windows is now rendered using hardware acceleration when available. Mozilla has implemented the Core Animation rendering model for plugins on Mac OS X. Linux builds are now built with -fomit-frame-pointer. Support for new SVG and HTML5 web technologies.[177]
3.7a4webm Mozilla Developer Preview 3.7 Alpha 4 WebM May 19, 2010 Added WebM video playback.
3.7a5 Mozilla Developer Preview 3.7 Alpha 5 June 14, 2010 Fifth Firefox 3.7 alpha release. First official release to include linux-x86_64 and mac-x86_64 builds and first regular release to include WebM video playback. New Addons Manager (placeholder UI only). Tab on Top can now be implemented. Firefox now uses hardware acceleration for video playback. Cocoa NPAPI support. ChromeWorker with jsctypes support. Lazy frame construction for faster dynamic pages. JavaScript performance improvements. Loading the URL about:memory now shows how much memory is used by different parts of Firefox. More Performance improvement and support for new CSS and HTML5 web technology.[178]
2.0 4.0b1 Firefox 4.0 Beta 1 July 6, 2010 First Firefox 4.0 beta release. Tabs are now on top by default on Windows. On Windows Vista and Windows 7 the menu bar has been replaced with the Firefox button. The Bookmarks Toolbar has been replaced with a Bookmarks Button by default (you can switch it back if you'd like). Support for more HTML5 technologies.[179]
4.0b2 Firefox 4.0 Beta 2 July 27, 2010 Second Firefox 4.0 beta release. Tabs are now on top by default on OSX. App Tabs can now be created. Content animation using CSS Transitions can now be implemented. Responsiveness and scrolling improvements from the new retained layers layout system. JavaScript speed improvements due to engine optimizations. Changes to how XPCOM components are registered in order to help startup time and process separation.[180]
4.0b3 Firefox 4.0 Beta 3 August 11, 2010 Third Firefox 4.0 beta release. Web authors can now get touch events from Firefox users on Windows 7 machines. A new way of representing values in JavaScript that allows Firefox to execute heavy, numeric code (used for things like graphics and animations) more efficiently.[181]
4.0b4 Firefox 4.0 Beta 4 August 24, 2010 Fourth Firefox 4.0 beta release. Firefox Sync is now included. Panorama, a new feature that gives users a visual overview of all open tabs, allowing them to be sorted and grouped, is now included. An experimental API is included to provide more efficient Javascript animations. Firefox now supports the HTML5 video "buffered" property.[182]
4.0b5 Firefox 4.0 Beta 5 September 7, 2010 Fifth Firefox 4.0 beta release. Support for the new proposed Audio Data API. Direct2D Hardware Acceleration is now on by default for Windows 7 users. Firefox button has a new look for Windows Vista and Windows 7 users. Support for HSTS security protocol allowing sites to insist that they only be loaded over SSL.[183]
4.0b6 Firefox 4.0 Beta 6 September 14, 2010 Sixth Firefox 4.0 beta release. Fixed a stability issue affecting Windows users. Fixed an issue causing rendering errors with plugins affecting Mac OS X users.[184]
4.0b7 Firefox 4.0 Beta 7 November 10, 2010 Seventh Firefox 4.0 beta release. Uses JägerMonkey, a new, faster JavaScript engine. WebGL is enabled by default on Windows and Mac OS X. Certain rendering operations are now hardware-accelerated using Direct3D 9 on Windows XP, Direct3D 10 on Windows Vista and 7, and OpenGL on Mac OS X. Improved web typography using OpenType with support for ligatures, kerning and font variants. HTML5 Forms API makes web based forms easier to implement and validate.[185]
4.0b8 Firefox 4.0 Beta 8 December 21, 2010 Eighth Firefox 4.0 beta release. The Firefox Sync setup experience has been greatly improved across desktop and mobile devices. Speed, functionality, and compatibility improvements to WebGL. Additional polish for the Firefox Add-ons Manager.[186]
4.0b9 Firefox 4.0 Beta 9 January 14, 2011 Ninth Firefox 4.0 beta release. Overhaul of the bookmarks and history code, enabling faster bookmarking and startup performance. Per-compartment garbage collection is now enabled, reducing work done during complex animations.[187]
4.0b10 Firefox 4.0 Beta 10 January 25, 2011 Tenth Firefox 4.0 beta release. Compatibility and stability improvements when using Adobe Flash on Mac OS X. Improvements in memory usage. Support for a graphics driver blacklist to improve stability.[188]
4.0b11 Firefox 4.0 Beta 11 February 8, 2011 Eleventh Firefox 4.0 beta release. Support for the proposed Do Not Track ("DNT") header. Connection status messages are now shown in a small overlay. WebGL has been re-enabled on Linux. The default homepage design has been refreshed. Firefox no longer switches into offline mode automatically.[189]
4.0b12 Firefox 4.0 Beta 12 February 25, 2011 Twelfth Firefox 4.0 beta release. Increased performance while viewing Flash content. Improved plugin compatibility with hardware acceleration enabled. Hovering over links now displays the URL at the bottom of the window rather than in the location bar. General stability, performance, and compatibility improvements.[190]
4.0 RC1 Firefox 4.0
Release Candidate 1
March 9, 2011 First Firefox 4.0 release candidate. General stability, performance, and compatibility improvements.[191]
4.0 RC2 Firefox 4.0
Release Candidate 2
March 18, 2011 Second Firefox 4.0 release candidate. Blacklisted a few invalid HTTPS certificates. Updated localizations for 29 locales. Added Vietnamese localization, bringing the total languages available in Firefox 4 to 83.

[192]

4.0 Firefox 4.0
"Tumucumaque"
March 22, 2011 Official Firefox 4.0 release. Identical to 4.0 RC2.[193]
4.0.1 Firefox 4.0.1
"Macaw"
April 28, 2011 Regular security and stability update.[194]

End-of-life 4.0.x product line

Firefox 5 5.0 5.0a2 Firefox 5.0 Aurora April 13, 2011 First Firefox 5.0 Aurora build.[195][196]
5.0b1 Firefox 5.0 Beta 1 May 4, 2011 No official Firefox 5.0 beta release.
Renamed "Aurora 5.0 Alpha 2" build to test release channel switching for users on the Aurora-Channel.[197]
5.0b2 Firefox 5.0 Beta 2 May 20, 2011 First Firefox 5.0 Beta release.[198][199]
5.0b3 Firefox 5.0 Beta 3 June 1, 2011 Second Firefox 5.0 Beta release.
5.0b5[t 3] Firefox 5.0 Beta 5 June 9, 2011 Third Firefox 5.0 Beta release.
5.0b6 Firefox 5.0 Beta 6 June 14, 2011 Fourth Firefox 5.0 Beta release.
5.0b7 Firefox 5.0 Beta 7 June 15, 2011 Fifth Firefox 5.0 Beta release.
5.0 Firefox 5.0 June 21, 2011 Official Firefox 5.0 release. Added support for CSS animations. The Do-Not-Track header preference has been moved to increase discoverability. Tuned HTTP idle connection logic for increased performance. Improved canvas, JavaScript, memory, and networking performance. Improved standards support for HTML5, XHR, MathML, SMIL, and canvas. Improved spell checking for some locales. Improved desktop environment integration for Linux users. WebGL content can no longer load cross-domain textures. Background tabs have setTimeout and setInterval clamped to 1000 ms to improve performance.[200]
5.0.1 Firefox 5.0.1 July 11, 2011 Off-cycle stability update. Worked around issue in Mac OS X 10.7 that caused Firefox to crash, and issue caused by Apple's "Java for Mac OS X 10.6 Update 5" that prevented Java plugin from loading. No changes made on Windows side.[201]

End-of-life 5.0.x product line on August 16, 2011.

Firefox 6 6.0 6.0a1 Firefox 6.0 Nightly April 13, 2011 First Firefox 6.0 Nightly build.[195][202]
6.0a2 Firefox 6.0 Aurora May 25, 2011 First Firefox 6.0 Aurora build.[203][204]
6.0b1 Firefox 6.0 Beta 1 July 8, 2011 First Firefox 6.0 Beta release.[205][206]
6.0b2 Firefox 6.0 Beta 2 July 16, 2011 Second Firefox 6.0 Beta release.
6.0b3 Firefox 6.0 Beta 3 July 26, 2011 Third Firefox 6.0 Beta release.
6.0b4 Firefox 6.0 Beta 4 August 1, 2011 Fourth Firefox 6.0 Beta release.
6.0b5 Firefox 6.0 Beta 5 August 5, 2011 Fifth Firefox 6.0 Beta release.
6.0 Firefox 6.0 August 16, 2011 Official Firefox 6.0 release. The address bar now highlights the domain of the website you're visiting.Streamlined the look of the site identity block. Added support for the latest draft version of WebSockets with a prefixed API. Added support for EventSource / server-sent events. Added support for window.matchMedia. Added Scratchpad, an interactive JavaScript prototyping environment. Added a new Web Developer menu item and moved development-related items into it. Improved usability of the Web Console. Improved the discoverability of Firefox Sync. Reduced browser startup time when using Panorama. Fixed several stability and security issues.[207]
6.0.1 Firefox 6.0.1 August 30, 2011 Off-cycle security update. Blacklisted a compromised HTTPS certificate.[208]
6.0.2 Firefox 6.0.2 September 6, 2011 Off-cycle security update.[209]

End-of-life 6.0.x product line on September 27, 2011.

Firefox 7 7.0 7.0a1 Firefox 7.0 Nightly May 25, 2011 First Firefox 7.0 Nightly build.[210]
7.0a2 Firefox 7.0 Aurora July 6, 2011 First Firefox 7.0 Aurora build.[211][212]
7.0b1 Firefox 7.0 Beta 1 August 18, 2011 First Firefox 7.0 Beta release.[213][214]
7.0b2 Firefox 7.0 Beta 2 August 26, 2011 Second Firefox 7.0 Beta release.
7.0b4 [t 4] Firefox 7.0 Beta 4 September 6, 2011 Third Firefox 7.0 Beta release.
7.0b5 Firefox 7.0 Beta 5 September 9, 2011 Fourth Firefox 7.0 Beta release.
7.0b6 Firefox 7.0 Beta 6 September 19, 2011 Fifth Firefox 7.0 Beta release.
7.0 Firefox 7.0 September 27, 2011 Official Firefox 7.0 release. Drastically improved memory handling for certain use cases. Added a new rendering backend to speed up Canvas operations on Windows systems. Bookmark and password changes now sync almost instantly when using Firefox Sync. The 'http://' URL prefix is now hidden by default. Added support for text-overflow: ellipsis. Added support for the Web Timing specification. Enhanced support for MathML. The WebSocket protocol has been updated from version 7 to version 8. Added an opt-in system for users to send performance data back to Mozilla to improve future versions of Firefox.[215]
7.0.1 Firefox 7.0.1 September 29, 2011 Off-cycle security and stability update. Fixed a rare issue that hid one or more add-ons after a Firefox update.[216]

End-of-life 7.0.x product line on November 8, 2011.

Firefox 8 8.0 8.0a1 Firefox 8.0 Nightly July 6, 2011 First Firefox 8.0 Nightly build.[217]
8.0a2 Firefox 8.0 Aurora August 19, 2011 First Firefox 8.0 Aurora build.[218][219]
8.0b1 Firefox 8.0 Beta 1 September 29, 2011 First Firefox 8.0 Beta release.[220][221]
8.0b2 Firefox 8.0 Beta 2 October 10, 2011 Second Firefox 8.0 Beta release.
8.0b3 Firefox 8.0 Beta 3 October 13, 2011 Third Firefox 8.0 Beta release.
8.0b4 Firefox 8.0 Beta 4 October 19, 2011 Fourth Firefox 8.0 Beta release.
8.0b5 Firefox 8.0 Beta 5 October 27, 2011 Fifth Firefox 8.0 Beta release. Removed support for new tab animation due to incompatibilities with some extensions.
8.0b6 Firefox 8.0 Beta 6 November 1, 2011 Sixth Firefox 8.0 Beta release.
8.0 Firefox 8.0 November 8, 2011 Official Firefox 8.0 release.[222]
8.0.1 Firefox 8.0.1 November 21, 2011 Off-cycle security and stability update.[223]

End-of-life 8.0.x product line on December 20, 2011.

Firefox 9 9.0 9.0a1 Firefox 9.0 Nightly August 17, 2011 First Firefox 9.0 Nightly build.[224]
9.0a2 Firefox 9.0 Aurora September 28, 2011 First Firefox 9.0 Aurora build.[225][226]
9.0b1 Firefox 9.0 Beta 1 November 11, 2011 First Firefox 9.0 Beta release.[227][228]
9.0b2 Firefox 9.0 Beta 2 November 17, 2011 Second Firefox 9.0 Beta release.
9.0b3 Firefox 9.0 Beta 3 November 24, 2011 Third Firefox 9.0 Beta release.
9.0b4 Firefox 9.0 Beta 4 December 1, 2011 Fourth Firefox 9.0 Beta release.
9.0b5 Firefox 9.0 Beta 5 December 8, 2011 Fifth Firefox 9.0 Beta release.
9.0b6 Firefox 9.0 Beta 6 December 15, 2011 Sixth Firefox 9.0 Beta release.
9.0 Firefox 9.0 December 20, 2011 Official Firefox 9.0 release.[229]
9.0.1 Firefox 9.0.1 December 21, 2011 Off-cycle security and stability update.[230]

End-of-life 9.0.x product line on January 31, 2012.

Firefox 10 10.0 10.0a1 Firefox 10.0 Nightly September 28, 2011 First Firefox 10.0 Nightly build.[231]
10.0a2 Firefox 10.0 Aurora November 9, 2011 First Firefox 10.0 Aurora build.[232][233]
10.0b1 Firefox 10.0 Beta 1 December 22, 2011 First Firefox 10.0 Beta release.[234][235]
10.0b2 Firefox 10.0 Beta 2 December 28, 2011 Second Firefox 10.0 Beta release.
10.0b3 Firefox 10.0 Beta 3 January 4, 2012 Third Firefox 10.0 Beta release.
10.0b4 Firefox 10.0 Beta 4 January 13, 2012 Fourth Firefox 10.0 Beta release.
10.0b5 Firefox 10.0 Beta 5 January 20, 2012 Fifth Firefox 10.0 Beta release.
10.0b6 Firefox 10.0 Beta 6 January 26, 2012 Sixth Firefox 10.0 Beta release.
10.0 Firefox 10.0 January 31, 2012 Official Firefox 10.0 release.[236] First Extended Support Release (ESR).[237]
10.0.1 Firefox 10.0.1 February 10, 2012 Off-cycle security and stability update.[238]
10.0.2 Firefox 10.0.2 February 16, 2012 Off-cycle security and stability update.[239]

End-of-life 10.0.x product line on March 13, 2012.

10.0.3esr Firefox 10.0.3esr March 13, 2012 Regular security and stability update.[240]
10.0.4esr Firefox 10.0.4esr April 24, 2012 Regular security and stability update.[241]
10.0.5esr Firefox 10.0.5esr June 5, 2012 Regular security and stability update.[242]
10.0.6esr Firefox 10.0.6esr July 17, 2012 Regular security and stability update.[243]
10.0.7esr Firefox 10.0.7esr August 28, 2012 Regular security and stability update. Also fixed contenteditable breaks that middle-click to open links, and addresses a fix that allows specifying wildcard that matches all simple netbiosnames in network.automatic-ntlm-auth.trusted-uris.[244]
10.0.8esr Firefox 10.0.8esr October 9, 2012 Regular security and stability update.[245]
10.0.9esr Firefox 10.0.9esr October 12, 2012 Off-cycle security update.[246]
10.0.10esr Firefox 10.0.10esr October 26, 2012 Off-cycle security update.[247]
10.0.11esr Firefox 10.0.11esr November 20, 2012 Off-cycle security update.[248]
10.0.12esr Firefox 10.0.12esr January 8, 2013 Regular security update.[249] End-of-life 10.0.x ESR product line on February 12, 2013.
Firefox 11 11.0 11.0a1 Firefox 11.0 Nightly November 9, 2011 First Firefox 11.0 Nightly build.[250]
11.0a2 Firefox 11.0 Aurora December 21, 2011 First Firefox 11.0 Aurora build.[251][252]
11.0b1 Firefox 11.0 Beta 1 February 3, 2012 First Firefox 11.0 Beta release.[253][254]
11.0b2 Firefox 11.0 Beta 2 February 10, 2012 Second Firefox 11.0 Beta release.
11.0b3 Firefox 11.0 Beta 3 February 17, 2012 Third Firefox 11.0 Beta release.
11.0b4 Firefox 11.0 Beta 4 February 24, 2012 Fourth Firefox 11.0 Beta release.
11.0b5 Firefox 11.0 Beta 5 March 2, 2012 Fifth Firefox 11.0 Beta release.
11.0b6 Firefox 11.0 Beta 6 March 9, 2012 Sixth Firefox 11.0 Beta release.
11.0b7 Firefox 11.0 Beta 7 March 9, 2012 Seventh Firefox 11.0 Beta release.
11.0b8 Firefox 11.0 Beta 8 March 11, 2012 Eighth Firefox 11.0 Beta release.
11.0 Firefox 11.0 March 13, 2012 Official Firefox 11.0 release.[255]

End-of-life 11.0.x product line on April 24, 2012.

Firefox 12 12.0 12.0a1 Firefox 12.0 Nightly December 20, 2011 First Firefox 12.0 Nightly build.[256]
12.0a2 Firefox 12.0 Aurora February 2, 2012 First Firefox 12.0 Aurora build.[257][258]
12.0b1 Firefox 12.0 Beta 1 March 16, 2012 First Firefox 12.0 Beta release.[259][260]
12.0b2 Firefox 12.0 Beta 2 March 22, 2012 Second Firefox 12.0 Beta release.
12.0b3 Firefox 12.0 Beta 3 March 30, 2012 Third Firefox 12.0 Beta release.
12.0b4 Firefox 12.0 Beta 4 April 5, 2012 Fourth Firefox 12.0 Beta release.
12.0b5 Firefox 12.0 Beta 5 April 16, 2012 Fifth Firefox 12.0 Beta release.
12.0b6 Firefox 12.0 Beta 6 April 18, 2012 Sixth Firefox 12.0 Beta release.
12.0 Firefox 12.0 April 24, 2012 Official Firefox 12.0 release. End-of-life 12.0.x product line on June 5, 2012.
Firefox 13 13.0 13.0a1 Firefox 13.0 Nightly February 1, 2012 First Firefox 13.0 Nightly build.
13.0a2 Firefox 13.0 Aurora March 19, 2012 First Firefox 13.0 Aurora build.
13.0b1 Firefox 13.0 Beta 1 April 27, 2012 First Firefox 13.0 Beta release.
13.0b2 Firefox 13.0 Beta 2 May 3, 2012 Second Firefox 13.0 Beta release.
13.0b3 Firefox 13.0 Beta 3 May 15, 2012 Third Firefox 13.0 Beta release.
13.0b4 Firefox 13.0 Beta 4 May 17, 2012 Fourth Firefox 13.0 Beta release.
13.0b5 Firefox 13.0 Beta 5 May 25, 2012 Fifth Firefox 13.0 Beta release.
13.0b6 Firefox 13.0 Beta 6 May 30, 2012 Sixth Firefox 13.0 Beta release.
13.0b7 Firefox 13.0 Beta 7 June 1, 2012 Seventh Firefox 13.0 Beta release.
13.0 Firefox 13.0 June 5, 2012 Official Firefox 13.0 release.
13.0.1 Firefox 13.0.1 June 15, 2012 Off-cycle security and stability update.[261]

End-of-life 13.0.x product line on July 17, 2012.

Firefox 14 14.0 14.0a1 Firefox 14.0 Nightly March 14, 2012 First Firefox 14.0 Nightly build.
14.0a2 Firefox 14.0 Aurora April 27, 2012 First Firefox 14.0 Aurora build.
14.0b6 Firefox 14.0 Beta 6 June 5, 2012 First Firefox 14.0 Beta release.[262]
14.0b7 Firefox 14.0 Beta 7 June 14, 2012 Second Firefox 14.0 Beta release.
14.0b8 Firefox 14.0 Beta 8 June 22, 2012 Third Firefox 14.0 Beta release.
14.0b9 Firefox 14.0 Beta 9 June 25, 2012 Fourth Firefox 14.0 Beta release.
14.0b10 Firefox 14.0 Beta 10 July 2, 2012 Fifth Firefox 14.0 Beta release.
14.0b11 Firefox 14.0 Beta 11 July 6, 2012 Sixth Firefox 14.0 Beta release.
14.0b12 Firefox 14.0 Beta 12 July 11, 2012 Seventh Firefox 14.0 Beta release.
14.0 Firefox 14.0 June 26, 2012 Official Firefox Mobile 14.0 release.[263]
14.0.1 Firefox 14.0.1 July 17, 2012 Official Firefox Desktop 14.0 release. Off-cycle security and stability update.[264]

End-of-life 14.0.x product line on August 28, 2012.

Firefox 15 15.0 15.0a1 Firefox 15.0 Nightly April 25, 2012 First Firefox 15.0 Nightly build.
15.0a2 Firefox 15.0 Aurora June 5, 2012 First Firefox 15.0 Aurora build.
15.0b1 Firefox 15.0 Beta 1 July 17, 2012 First Firefox 15.0 Beta release.
15.0 Firefox 15.0 August 28, 2012 Official Firefox 15.0 release.
15.0.1 Firefox 15.0.1 September 6, 2012 Off-cycle stability update.[265] End-of-life 15.0.x product line on October 9, 2012.
Firefox 16 16.0 16.0a1 Firefox 16.0 Nightly June 5, 2012 First Firefox 16.0 Nightly build.
16.0a2 Firefox 16.0 Aurora July 17, 2012 First Firefox 16.0 Aurora build.
16.0b1 Firefox 16.0 Beta 1 August 28, 2012 First Firefox 16.0 Beta release.
16.0 Firefox 16.0 October 9, 2012 Official Firefox 16.0 release.
16.0.1 Firefox 16.0.1 October 11, 2012 Off-cycle security and stability update.[266]
16.0.2 Firefox 16.0.2 October 26, 2012 Off-cycle security and stability update.[267] End-of-life 16.0.x product line on November 20, 2012.
Firefox 17 17.0 17.0a1 Firefox 17.0 Nightly July 17, 2012 First Firefox 17.0 Nightly build.
17.0a2 Firefox 17.0 Aurora August 28, 2012 First Firefox 17.0 Aurora build.
17.0b1 Firefox 17.0 Beta 1 October 9, 2012 First Firefox 17.0 Beta release.
17.0b6 Firefox 17.0 Beta 6 October 11, 2012 Second Firefox 17.0 Beta release.[268]
17.0 Firefox 17.0 November 20, 2012 Official Firefox 17.0 release.[269]
17.0esr Firefox 17.0esr November 20, 2012 Official Firefox 17.0 Extended Support Release (ESR).
17.0.1 Firefox 17.0.1 November 30, 2012 Off-cycle stability update.[270] End-of-life 17.0.x product line on January 8, 2013.
17.0.1esr Firefox 17.0.1esr November 30, 2012 Off-cycle stability update.
17.0.2esr Firefox 17.0.2esr January 8, 2013 Regular security and stability updates. Fixed improvements to the Click-to-Play vulnerable plugin blocklisting feature.[271]
17.0.3esr Firefox 17.0.3esr February 19, 2013 Regular security update.[272]
17.0.4esr Firefox 17.0.4esr March 7, 2013 Regular security update.[273]
17.0.5esr Firefox 17.0.5esr April 2, 2013 Regular security update.[274]
17.0.6esr Firefox 17.0.6esr May 10, 2013 Regular security update.[275]
17.0.7esr Firefox 17.0.7esr June 25, 2013 Regular security update.[276]
17.0.8esr Firefox 17.0.8esr August 6, 2013 Regular security update.[277]
17.0.9esr Firefox 17.0.9esr September 17, 2013 Regular security update.[278]
17.0.10esr Firefox 17.0.10esr October 29, 2013 Regular security update.[279]
17.0.11esr Firefox 17.0.11esr November 15, 2013 Off-cycle stability update.[280] End-of-life 17.0.x ESR product line on December 3, 2013.
Firefox 18 18.0 18.0a1 Firefox 18.0 Nightly August 28, 2012 First Firefox 18.0 Nightly build. Adds a Metro user interface on Windows 8.
18.0a2 Firefox 18.0 Aurora October 9, 2012 First Firefox 18.0 Aurora build.
18.0b1 Firefox 18.0 Beta 1 November 20, 2012 First Firefox 18.0 Beta release.
18.0b7 Firefox 18.0 Beta 7 November 26, 2012 Seventh Firefox 18.0 Beta release.[281]
18.0 Firefox 18.0 January 8, 2013 Official Firefox 18.0 release.[282]
18.0.1 Firefox 18.0.1 January 18, 2013 Off-cycle stability update.[283]
18.0.2 Firefox 18.0.2 February 5, 2013 Off-cycle stability update.[284] End-of-life 18.0.x product line on February 19, 2013.
Firefox 19 19.0 19.0a1 Firefox 19.0 Nightly October 9, 2012 First Firefox 19.0 Nightly build.
19.0a2 Firefox 19.0 Aurora November 20, 2012 First Firefox 19.0 Aurora build.
19.0b1 Firefox 19.0 Beta 1 January 8, 2013 First Firefox 19.0 Beta release.
19.0b6 Firefox 19.0 Beta 6 January 10, 2013 Sixth Firefox 19.0 Beta release.[285]
19.0 Firefox 19.0 February 19, 2013 Official Firefox 19.0 release.[286]
19.0.1 Firefox 19.0.1 February 27, 2013 Off-cycle stability update.[287]
19.0.2 Firefox 19.0.2 March 7, 2013 Off-cycle security update.[288] End-of-life 19.0.x product line on April 2, 2013.
Firefox 20 20.0 20.0a1 Firefox 20.0 Nightly November 20, 2012 First Firefox 20.0 Nightly build.
20.0a2 Firefox 20.0 Aurora January 8, 2013 First Firefox 20.0 Aurora build.[289]
20.0b1 Firefox 20.0 Beta 1 February 22, 2013 First Firefox 20.0 Beta release.[290]
20.0b2 Firefox 20.0 Beta 2 February 27, 2013 Second Firefox 20.0 Beta release.[291]
20.0b3 Firefox 20.0 Beta 3 March 5, 2013 Third Firefox 20.0 Beta release.[292]
20.0b4 Firefox 20.0 Beta 4 March 7, 2013 Fourth Firefox 20.0 Beta release.[293]
20.0b5 Firefox 20.0 Beta 5 March 13, 2013 Fifth Firefox 20.0 Beta release.[294]
20.0b6 Firefox 20.0 Beta 6 March 20, 2013 Sixth Firefox 20.0 Beta release.[295]
20.0b7 Firefox 20.0 Beta 7 March 25, 2013 Seventh Firefox 20.0 Beta release.[296]
20.0 Firefox 20.0 April 2, 2013 Official Firefox 20.0 release.
20.0.1 Firefox 20.0.1 April 11, 2013 Off-cycle security update.[297] End-of-life 20.0.x product line on May 14, 2013
Firefox 21 21.0 21.0a1 Firefox 21.0 Nightly January 8, 2013 First Firefox 21.0 Nightly build.
21.0a2 Firefox 21.0 Aurora February 22, 2013 First Firefox 21.0 Aurora build.[298]
21.0b1 Firefox 21.0 Beta 1 April 2, 2013 First Firefox 21.0 Beta release.
21.0b2 Firefox 21.0 Beta 2 April 4, 2013 Second Firefox 21.0 Beta release.[299]
21.0b3 Firefox 21.0 Beta 3 April 17, 2013 Third Firefox 21.0 Beta release.[300]
21.0 Firefox 21.0 May 14, 2013 Official Firefox 21.0 release. End-of-life 21.0.x product line on June 25, 2013.
Firefox 22 22.0 22.0a1 Firefox 22.0 Nightly February 23, 2013 First Firefox 22.0 Nightly build.[301]
22.0a2 Firefox 22.0 Aurora April 2, 2013 First Firefox 22.0 Aurora build.
22.0b1 Firefox 22.0 Beta 1 May 14, 2013 First Firefox 22.0 Beta release.
22.0 Firefox 22.0 June 25, 2013 Official Firefox 22.0 release.[302] End-of-life 22.0.x product line on August 6, 2013.
Firefox 23 23.0 23.0a1 Firefox 23.0 Nightly April 2, 2013 First Firefox 23.0 Nightly build.
23.0a2 Firefox 23.0 Aurora May 14, 2013 First Firefox 23.0 Aurora build.
23.0b1 Firefox 23.0 Beta 1 June 25, 2013 First Firefox 23.0 Beta release.
23.0 Firefox 23.0 August 6, 2013 Official Firefox 23.0 release. In this Version Mozilla changed the Firefox Logo.[303]
23.0.1 Firefox 23.0.1 August 16, 2013 Off-cycle stability update.[304] End-of-life 23.0.x product line on September 17, 2013.
Firefox 24 24.0 24.0a1 Firefox 24.0 Nightly May 14, 2013 First Firefox 24.0 Nightly build.
24.0a2 Firefox 24.0 Aurora June 25, 2013 First Firefox 24.0 Aurora build.
24.0b1 Firefox 24.0 Beta 1 August 6, 2013 First Firefox 24.0 Beta release.
24.0 Firefox 24.0 September 17, 2013 Official Firefox 24.0 release.[305] End-of-life 24.0.x product line on October 29, 2013.
24.0esr Firefox 24.0esr September 17, 2013 Official Firefox 24.0 Extended Support Release (ESR).[306]
24.1.0esr Firefox 24.1.0esr October 29, 2013 Regular security update.[307]
24.1.1esr Firefox 24.1.1esr November 15, 2013 Off-cycle stability update.[308]
24.2.0esr Firefox 24.2.0esr December 10, 2013 Regular security update.[309]
24.3.0esr Firefox 24.3.0esr February 4, 2014 Regular security update.[310]
24.4.0esr Firefox 24.4.0esr March 18, 2014 Regular security update.[311]
24.5.0esr Firefox 24.5.0esr April 29, 2014 Regular security update.[312]
24.6.0esr Firefox 24.6.0esr June 10, 2014 Regular security update.[313]
24.7.0esr Firefox 24.7.0esr July 22, 2014 Regular security update.[314]
24.8.0esr Firefox 24.8.0esr September 2, 2014 Regular security update.[315]
24.8.1esr Firefox 24.8.1esr September 24, 2014 Off-cycle security update.[316] End-of-life 24.x.x ESR product line on October 14, 2014.
Firefox 25 25.0 25.0a1 Firefox 25.0 Nightly June 25, 2013 First Firefox 25.0 Nightly build.
25.0a2 Firefox 25.0 Aurora August 6, 2013 First Firefox 25.0 Aurora build.
25.0b1 Firefox 25.0 Beta 1 September 17, 2013 First Firefox 25.0 Beta release.
25.0 Firefox 25.0 October 29, 2013 Official Firefox 25.0 release.[317]
25.0.1 Firefox 25.0.1 November 15, 2013 Off-cycle security and stability update.[318] End-of-life 25.0.x product line on December 10, 2013
Firefox 26 26.0 26.0a1 Firefox 26.0 Nightly August 6, 2013 First Firefox 26.0 Nightly build.
26.0a2 Firefox 26.0 Aurora September 17, 2013 First Firefox 26.0 Aurora build.
26.0b1 Firefox 26.0 Beta 1 October 29, 2013 First Firefox 26.0 Beta Release.
26.0 Firefox 26.0 December 10, 2013 Official Firefox 26.0 release.
26.0.1 Firefox 26.0.1 December 20, 2013 Off-cycle stability mobile release.[319] End-of-life 26.0.x product line on February 4, 2014.
Firefox 27 27.0 27.0a1 Firefox 27.0 Nightly September 17, 2013 First Firefox 27.0 Nightly build.
27.0a2 Firefox 27.0 Aurora October 29, 2013 First Firefox 27.0 Aurora build.
27.0b1 Firefox 27.0 Beta 1 December 10, 2013 First Firefox 27.0 Beta release.
27.0 Firefox 27.0 February 4, 2014 Official Firefox 27.0 release.
27.0.1 Firefox 27.0.1 February 13, 2014 Off-cycle stability release.[320] End-of-life 27.0.x product line on March 18, 2014.
Firefox 28 28.0 28.0a1 Firefox 28.0 Nightly October 29, 2013 First Firefox 28.0 Nightly build.
28.0a2 Firefox 28.0 Aurora December 10, 2013 First Firefox 28.0 Aurora build.
28.0b1 Firefox 28.0 Beta 1 February 4, 2014 First Firefox 28.0 Beta release.
28.0 Firefox 28.0 March 18, 2014 Official Firefox 28.0 release.
28.0.1 Firefox 28.0.1 March 24, 2014 Off-cycle stability mobile update.[321]End-of-life 28.0.x product line on April 29, 2014.
Firefox 29 29.0 29.0a1 Firefox 29.0 Nightly December 10, 2013 First Firefox 29.0 Nightly build.
29.0a2 Firefox 29.0 Aurora February 4, 2014 First Firefox 29.0 Aurora build.
29.0b1 Firefox 29.0 Beta 1 March 18, 2014 First Firefox 29.0 Beta release.
29.0 Firefox 29.0 April 29, 2014 Official Firefox 29.0 release.
29.0.1 Firefox 29.0.1 May 9, 2014 Off-cycle stability update.[322] End-of-life 29.0.x product line on June 10, 2014.
Firefox 30 30.0 30.0a1 Firefox 30.0 Nightly February 4, 2014 First Firefox 30.0 Nightly build.
30.0a2 Firefox 30.0 Aurora March 18, 2014 First Firefox 30.0 Aurora build.
30.0b1 Firefox 30.0 Beta 1 April 29, 2014 First Firefox 30.0 Beta release.
30.0 Firefox 30.0 June 10, 2014 Official Firefox 30.0 release. End-of-life 30.0.x product line on July 22, 2014.
Firefox 31 31.0 31.0a1 Firefox 31.0 Nightly March 18, 2014 First Firefox 31.0 Nightly build.
31.0a2 Firefox 31.0 Aurora April 29, 2014 First Firefox 31.0 Aurora build.
31.0b1 Firefox 31.0 Beta 1 June 10, 2014 First Firefox 31.0 Beta release.
31.0 Firefox 31.0 July 22, 2014 Official Firefox 31.0 release.[323] End-of-life 31.0.x product line on September 2, 2014.
31.0esr Firefox 31.0esr July 22, 2014 Official Firefox 31.0 Extended Support Release (ESR).[306]
31.1.0esr Firefox 31.1.0esr September 2, 2014 Regular security update.[324]
31.1.1esr Firefox 31.1.1esr September 24, 2014 Off-cycle security update.[325]
31.2.0esr Firefox 31.2.0esr October 14, 2014 Regular security and stability update.[326]
31.3.0esr Firefox 31.3.0esr December 1, 2014 Regular security and stability update.[327] End-of-life 31.x.x ESR product line on August 11, 2015.
Firefox 32 32.0 32.0a1 Firefox 32.0 Nightly April 29, 2014 First Firefox 32.0 Nightly build.
32.0a2 Firefox 32.0 Aurora June 10, 2014 First Firefox 32.0 Aurora build.
32.0b1 Firefox 32.0 Beta 1 July 22, 2014 First Firefox 32.0 Beta release.
32.0 Firefox 32.0 September 2, 2014 Official Firefox 32.0 release.
32.0.1 Firefox 32.0.1 September 12, 2014 Off-cycle stability update.[328]
32.0.2 Firefox 32.0.2 September 18, 2014 Off-cycle stability update.[329]
32.0.3 Firefox 32.0.3 September 24, 2014 Off-cycle security update.[330] End-of-life 32.0.x product line on October 14, 2014.
Firefox 33 33.0 33.0a1 Firefox 33.0 Nightly June 10, 2014 First Firefox 33.0 Nightly build.
33.0a2 Firefox 33.0 Aurora July 22, 2014 First Firefox 33.0 Aurora build.
33.0b1 Firefox 33.0 Beta 1 September 2, 2014 First Firefox 33.0 Beta release.
33.0 Firefox 33.0 October 14, 2014 Official Firefox 33.0 release.
33.0.1 Firefox 33.0.1 October 24, 2014 Off-cycle stability update.[331]
33.0.2 Firefox 33.0.2 October 28, 2014 Off-cycle stability update.[332]
33.0.3 Firefox 33.0.3 November 6, 2014 Off-cycle stability update.[333]
33.1 Firefox 33.1 November 10, 2014 Firefox's 10-year anniversary.[334][335]
33.1.1 Firefox 33.1.1 November 14, 2014 Off-cycle stability update.[336] End-of-life 33.x product line on December 1, 2014.
Firefox 34 34.0 34.0a1 Firefox 34.0 Nightly July 22, 2014 First Firefox 34.0 Nightly build.
34.0a2 Firefox 34.0 Aurora September 2, 2014 First Firefox 34.0 Aurora build.
34.0b1 Firefox 34.0 Beta 1 October 14, 2014 First Firefox 34.0 Beta release.[323]
34.0 Firefox 34.0 December 1, 2014 Official Firefox 34.0 release.[323] End-of-life 34.0.x product line on January 13, 2015.
34.0.5 Firefox 34.0.5 December 1, 2014 Official Firefox 34.0.5 release.[323] End-of-life 34.0.x product line on January 13, 2015.
Firefox 35 35.0 35.0a1 Firefox 35.0 Nightly September 2, 2014 First Firefox 35.0 Nightly build.[323]
35.0a2 Firefox 35.0 Aurora
Firefox 35.0 Developer Edition
October 14, 2014 First Firefox 35.0 Aurora build.[323] Renamed to Firefox Developer Edition since November 10, 2014.[337][338]
35.0b1 Firefox 35.0 Beta 1 December 4, 2014 First Firefox 35.0 Beta release.[323]
35.0 Firefox 35.0 January 13, 2015 Official Firefox 35.0 release.[323] End-of-life 35.0.x product line on February 17, 2015.
Firefox 36 36.0 36.0a1 Firefox 36.0 Nightly October 14, 2014 First Firefox 36.0 Nightly build.[323]
36.0a2 Firefox 36.0 Developer Edition December 5, 2014 First Firefox 36.0 Developer Edition build.[323]
36.0b1 Firefox 36.0 Beta 1 January 13, 2015 First Firefox 36.0 Beta release.[323]
36.0 Firefox 36.0 February 24, 2015 Official Firefox 36.0 release.[323] End-of-life 36.0.x product line on April 7, 2015.
Firefox 37 37.0 37.0a1 Firefox 37.0 Nightly November 28, 2014 First Firefox 37.0 Nightly build.[323]
37.0a2 Firefox 37.0 Developer Edition January 13, 2015 First Firefox 37.0 Developer Edition build.[323]
37.0b1 Firefox 37.0 Beta 1 February 24, 2015 First Firefox 37.0 Beta release.[323]
37.0 Firefox 37.0 April 7, 2015 Official Firefox 37.0 release.[323] End-of-life 37.0.x product line on May 19, 2015.
Firefox 38 38.0 38.0a1 Firefox 38.0 Nightly January 12, 2015 First Firefox 38.0 Nightly build.[323]
38.0a2 Firefox 38.0 Developer Edition February 24, 2015 First Firefox 38.0 Developer Edition build.[323]
38.0b1 Firefox 38.0 Beta 1 April 7, 2015 First Firefox 38.0 Beta release.[323]
38.0 Firefox 38.0 May 19, 2015 Official Firefox 38.0 release.[323] End-of-life 38.0.x product line on June 30, 2015.
Firefox 39 39.0 39.0a1 Firefox 39.0 Nightly February 23, 2015 First Firefox 39.0 Nightly build.[323]
39.0a2 Firefox 39.0 Developer Edition April 7, 2015 First Firefox 39.0 Developer Edition build.[323]
39.0b1 Firefox 39.0 Beta 1 May 19, 2015 First Firefox 39.0 Beta release.[323]
39.0 Firefox 39.0 June 30, 2015 Official Firefox 39.0 release.[323] End-of-life 39.0.x product line on August 11, 2015.
Firefox 40 40.0 40.0a1 Firefox 40.0 Nightly April 6, 2015 First Firefox 40.0 Nightly build.[323]
40.0a2 Firefox 40.0 Developer Edition May 19, 2015 First Firefox 40.0 Developer Edition build.[323]
40.0b1 Firefox 40.0 Beta 1 June 30, 2015 First Firefox 40.0 Beta release.[323]
40.0 Firefox 40.0 August 11, 2015 Official Firefox 40.0 release.[323] End-of-life 40.0.x product line on September 22, 2015.
Firefox 41 41.0 41.0a1 Firefox 41.0 Nightly May 18, 2015 First Firefox 41.0 Nightly build.[323]
41.0a2 Firefox 41.0 Developer Edition June 30, 2015 First Firefox 41.0 Developer Edition build.[323]
41.0b1 Firefox 41.0 Beta 1 August 11, 2015 First Firefox 41.0 Beta release.[323]
41.0 Firefox 41.0 September 22, 2015 Official Firefox 41.0 release.[323]
Firefox 42 42.0 42.0a1 Firefox 42.0 Nightly June 29, 2015 First Firefox 42.0 Nightly build.[323]
42.0a2 Firefox 42.0 Developer Edition August 11, 2015 First Firefox 42.0 Developer Edition build.[323]
42.0b1 Firefox 42.0 Beta 1 September 22, 2015 First Firefox 42.0 Beta release.[323]
Firefox 43 43.0 43.0a1 Firefox 43.0 Nightly August 10, 2015 First Firefox 43.0 Nightly build.[323]
43.0a2 Firefox 43.0 Developer Edition September 22, 2015 First Firefox 43.0 Developer Edition build.[323]
Firefox 44 44.0 44.0a1 Firefox 44.0 Nightly September 22, 2015 First Firefox 44.0 Nightly build.[323]
Color Meaning
Green Current supported official release
Blue Future official release
Gold Former release; still supported
Red Former release; no longer supported
Yellow Current supported test release
Purple Future test release
Pink Former test release; no longer supported

Security Bug Bounty Program[edit]

In the Mozilla Security Bug Bounty Program, a bounty payment is offered to those reporting hitherto unknown security bugs. The Mozilla Foundation say that this is "designed to encourage security research in Mozilla software and to reward those who help us".[339]

See also[edit]

Notes[edit]

  1. ^ There was no version 3.6.1.
  2. ^ There was no version 3.6.5.
  3. ^ Builds of version 5.0b4 were created, but not released.
  4. ^ Builds of version 7.0b3 were created, but not released.

References[edit]

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