Firefox version history

This is the release history of Mozilla Firefox.

Current and future releases

Current supported official releases Firefox 50.0.2 Firefox 45.5.1 ESR

Current supported test releases Firefox 51.0 Beta Firefox 52.0 Developer Edition Firefox 53.0 Nightly

Future official releases Firefox 45.6 ESR Firefox 45.7 ESR Firefox 45.8 ESR Firefox 45.9 ESR Firefox 50.1.0 Firefox 51.0 Firefox 52.0 Firefox 53.0 Firefox 54.0 Firefox 55.0 Firefox 56.0 Firefox 57.0 Firefox 58.0 Firefox 59.0 Firefox 52.0 ESR Firefox 52.1 ESR Firefox 52.2 ESR Firefox 52.3 ESR Firefox 52.4 ESR Firefox 52.5 ESR Firefox 52.6 ESR Firefox 52.7 ESR

Future test releases Firefox 52.0 Beta Firefox 53.0 Developer Edition Firefox 53.0 Beta Firefox 54.0 Nightly Firefox 54.0 Developer Edition Firefox 54.0 Beta Firefox 55.0 Nightly Firefox 55.0 Developer Edition Firefox 55.0 Beta Firefox 56.0 Nightly Firefox 56.0 Developer Edition Firefox 56.0 Beta Firefox 57.0 Nightly Firefox 57.0 Developer Edition Firefox 57.0 Beta Firefox 58.0 Nightly Firefox 58.0 Developer Edition Firefox 58.0 Beta Firefox 59.0 Nightly Firefox 59.0 Developer Edition Firefox 59.0 Beta Firefox 60.0 Nightly Firefox 60.0 Developer Edition Firefox 60.0 Beta Firefox 61.0 Nightly Firefox 61.0 Developer Edition Firefox 62.0 Nightly

Release history

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

Former release

Former test release

Former release - still supported

Current supported official release

Current supported test release

Future official release

Future test release

Top

Release history

Browser name	Gecko version	Version	Codename	Release date[1]	Highlights
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.[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.[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. 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.[323]
		31.1.1esr	Firefox 31.1.1esr	September 24, 2014	Off-cycle security update.[324]
		31.2.0esr	Firefox 31.2.0esr	October 14, 2014	Regular security and stability update.[325]
		31.3.0esr	Firefox 31.3.0esr	December 1, 2014	Regular security and stability update.[326]
		31.4.0esr	Firefox 31.4.0esr	January 13, 2015	Regular security update.[327]
		31.5.0esr	Firefox 31.5.0esr	February 24, 2015	Regular security update.[328]
		31.5.2esr	Firefox 31.5.2esr	March 20, 2015	Off-cycle security update.[329]
		31.5.3esr	Firefox 31.5.3esr	March 21, 2015	Off-cycle security update.[330]
		31.6.0esr	Firefox 31.6.0esr	March 31, 2015	Regular security update.[331]
		31.7.0esr	Firefox 31.7.0esr	May 12, 2015	Regular security update.[332]
		31.8.0esr	Firefox 31.8.0esr	July 2, 2015	Regular security update.[333] 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.[334]
		32.0.2	Firefox 32.0.2	September 18, 2014	Off-cycle stability update.[335]
		32.0.3	Firefox 32.0.3	September 24, 2014	Off-cycle security update.[336] 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.[337]
		33.0.2	Firefox 33.0.2	October 28, 2014	Off-cycle stability update.[338]
		33.0.3	Firefox 33.0.3	November 6, 2014	Off-cycle stability update.[339]
		33.1	Firefox 33.1	November 10, 2014	Firefox's 10-year anniversary.[340][341]
		33.1.1	Firefox 33.1.1	November 14, 2014	Off-cycle stability update.[342] 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.
		34.0	Firefox 34.0	December 1, 2014	Official Firefox 34.0 release.
		34.0.5	Firefox 34.0.5	December 1, 2014	Official Firefox 34.0.5 release. 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.
		35.0a2	Firefox 35.0 Aurora Firefox 35.0 Developer Edition	October 14, 2014	First Firefox 35.0 Aurora build. Renamed to Firefox Developer Edition since November 10, 2014.[343][344]
		35.0b1	Firefox 35.0 Beta 1	December 4, 2014	First Firefox 35.0 Beta release.
		35.0	Firefox 35.0	January 13, 2015	Official Firefox 35.0 release.
		35.0.1	Firefox 35.0.1	January 26, 2015	Off-cycle stability update.[345] End-of-life 35.0.x product line on February 24, 2015.
Firefox 36	36.0	36.0a1	Firefox 36.0 Nightly	October 14, 2014	First Firefox 36.0 Nightly build.
		36.0a2	Firefox 36.0 Developer Edition	December 5, 2014	First Firefox 36.0 Developer Edition build.
		36.0b1	Firefox 36.0 Beta 1	January 15, 2015	First Firefox 36.0 Beta release.
		36.0	Firefox 36.0	February 24, 2015	Official Firefox 36.0 release.
		36.0.1	Firefox 36.0.1	March 5, 2015	Off-cycle stability update.[346]
		36.0.2	Firefox 36.0.2	March 16, 2015	Off-cycle stability mobile update.[347]
		36.0.3	Firefox 36.0.3	March 20, 2015	Off-cycle security update.[348]
		36.0.4	Firefox 36.0.4	March 21, 2015	Off-cycle security update.[349] End-of-life 36.0.x product line on March 31, 2015.
Firefox 37	37.0	37.0a1	Firefox 37.0 Nightly	November 28, 2014	First Firefox 37.0 Nightly build.
		37.0a2	Firefox 37.0 Developer Edition	January 16, 2015	First Firefox 37.0 Developer Edition build.
		37.0b1	Firefox 37.0 Beta 1	February 24, 2015	First Firefox 37.0 Beta release.
		37.0	Firefox 37.0	March 31, 2015	Official Firefox 37.0 release.
		37.0.1	Firefox 37.0.1	April 3, 2015	Off-cycle stability and security update.[350]
		37.0.2	Firefox 37.0.2	April 20, 2015	Off-cycle stability and security update.[351] End-of-life 37.0.x product line on May 12, 2015.
Firefox 38	38.0	38.0a1	Firefox 38.0 Nightly	January 12, 2015	First Firefox 38.0 Nightly build.
		38.0a2	Firefox 38.0 Developer Edition	February 27, 2015	First Firefox 38.0 Developer Edition build.
		38.0b1	Firefox 38.0 Beta 1	April 3, 2015	First Firefox 38.0 Beta release.
		38.0	Firefox 38.0	May 12, 2015	Official Firefox 38.0 release.
		38.0esr	Firefox 38.0esr	May 12, 2015	Official Firefox 38.0 Extended Support Release (ESR).[306]
		38.0.1	Firefox 38.0.1	May 14, 2015	Off-cycle stability update.[352]
		38.0.1esr	Firefox 38.0.1esr	May 14, 2015	Off-cycle stability update.[352]
		38.0.5	Firefox 38.0.5	June 2, 2015	Official Firefox 38.0.5 release.[353] End-of-life 38.0.x product line on July 2, 2015.
		38.1.0esr	Firefox 38.1.0esr	July 2, 2015	Regular security update.[354]
		38.1.1esr	Firefox 38.1.1esr	August 6, 2015	Off-cycle security update for a zero-day exploit.[355]
		38.2.0esr	Firefox 38.2.0esr	August 11, 2015	Regular security and stability update.[356]
		38.2.1esr	Firefox 38.2.1esr	August 27, 2015	Off-cycle security update[357]
		38.3.0esr	Firefox 38.3.0esr	September 22, 2015	Regular security update.[358]
		38.4.0esr	Firefox 38.4.0esr	November 3, 2015	Regular security update.[359]
		38.5.0esr	Firefox 38.5.0esr	December 15, 2015	Regular security update.[360]
		38.5.1esr	Firefox 38.5.1esr	December 21, 2015	Off-cycle stability update.[361]
		38.5.2esr	Firefox 38.5.2esr	December 22, 2015	Off-cycle security and stability update.[362]
		38.6.0esr	Firefox 38.6.0esr	January 26, 2016	Regular security update.[363]
		38.6.1esr	Firefox 38.6.1esr	February 11, 2016	Off-cycle graphite2 library update.[364]
		38.7.0esr	Firefox 38.7.0esr	March 8, 2016	Regular security update.[365]
		38.7.1esr	Firefox 38.7.1esr	March 16, 2016	Off-cycle stability update.[366]
		38.8.0esr	Firefox 38.8.0esr	April 26, 2016	Regular security update.[367] End-of-life 38.x.x ESR product line on June 7, 2016.
Firefox 39	39.0	39.0a1	Firefox 39.0 Nightly	February 23, 2015	First Firefox 39.0 Nightly build.
		39.0a2	Firefox 39.0 Developer Edition	April 3, 2015	First Firefox 39.0 Developer Edition build.
		39.0b1	Firefox 39.0 Beta 1	May 26, 2015	First Firefox 39.0 Beta release.
		39.0	Firefox 39.0	July 2, 2015	Official Firefox 39.0 release.
		39.0.3	Firefox 39.0.3	August 6, 2015	Off-cycle security update for a zero-day exploit.[355] End-of-life 39.0.x product line on August 11, 2015.
Firefox 40	40.0	40.0a1	Firefox 40.0 Nightly	March 30, 2015	First Firefox 40.0 Nightly build.
		40.0a2	Firefox 40.0 Developer Edition	May 15, 2015	First Firefox 40.0 Developer Edition build.
		40.0b1	Firefox 40.0 Beta 1	July 2, 2015	First Firefox 40.0 Beta release.
		40.0	Firefox 40.0	August 11, 2015	Official Firefox 40.0 release.
		40.0.2	Firefox 40.0.2	August 13, 2015	Off-cycle stability update.[368]
		40.0.3	Firefox 40.0.3	August 27, 2015	Off-cycle stability and security update.[369] End-of-life 40.0.x product line on September 22, 2015.
Firefox 41	41.0	41.0a1	Firefox 41.0 Nightly	May 11, 2015	First Firefox 41.0 Nightly build.
		41.0a2	Firefox 41.0 Developer Edition	July 2, 2015	First Firefox 41.0 Developer Edition build.
		41.0b1	Firefox 41.0 Beta 1	August 11, 2015	First Firefox 41.0 Beta release.
		41.0	Firefox 41.0	September 22, 2015	Official Firefox 41.0 release.
		41.0.1	Firefox 41.0.1	September 30, 2015	Off-cycle stability update.[370]
		41.0.2	Firefox 41.0.2	October 15, 2015	Off-cycle security update.[371] End-of-life 41.0.x product line on November 3, 2015.
Firefox 42	42.0	42.0a1	Firefox 42.0 Nightly	July 2, 2015	First Firefox 42.0 Nightly build.
		42.0a2	Firefox 42.0 Developer Edition	August 14, 2015	First Firefox 42.0 Developer Edition build.
		42.0b1	Firefox 42.0 Beta 1	September 23, 2015	First Firefox 42.0 Beta release.
		42.0	Firefox 42.0	November 3, 2015	Official Firefox 42.0 release. End-of-life 42.0.x product line on December 15, 2015.
Firefox 43	43.0	43.0a1	Firefox 43.0 Nightly	August 10, 2015	First Firefox 43.0 Nightly build.
		43.0a2	Firefox 43.0 Developer Edition	September 22, 2015	First Firefox 43.0 Developer Edition build.
		43.0b1	Firefox 43.0 Beta 1	November 3, 2015	First Firefox 43.0 Beta release.
		43.0	Firefox 43.0	December 15, 2015	Official Firefox 43.0 release.
		43.0.1	Firefox 43.0.1	December 18, 2015	Off-cycle stability update.[372]
		43.0.2	Firefox 43.0.2	December 22, 2015	Off-cycle security and stability update.[373]
		43.0.3	Firefox 43.0.3	December 28, 2015	Off-cycle stability update.[374]
		43.0.4	Firefox 43.0.4	January 6, 2016	Off-cycle stability update.[375] End-of-life 43.0.x product line on January 26, 2016.
Firefox 44	44.0	44.0a1	Firefox 44.0 Nightly	September 21, 2015	First Firefox 44.0 Nightly build.
		44.0a2	Firefox 44.0 Developer Edition	November 3, 2015	First Firefox 44.0 Developer Edition build.
		44.0b1	Firefox 44.0 Beta 1	December 15, 2015	First Firefox 44.0 Beta release.
		44.0	Firefox 44.0	January 26, 2016	Official Firefox 44.0 release.[376] This release has the cookie confirmation dialog removed.[377]
		44.0.1	Firefox 44.0.1	February 8, 2016	Off-cycle stability update.[378]
		44.0.2	Firefox 44.0.2	February 11, 2016	Off-cycle security and stability update.[379] End-of-life 44.0.x product line on March 8, 2016.
Firefox 45	45.0	45.0a1	Firefox 45.0 Nightly	October 29, 2015	First Firefox 45.0 Nightly build.
		45.0a2	Firefox 45.0 Developer Edition	December 15, 2015	First Firefox 45.0 Developer Edition build.
		45.0b1	Firefox 45.0 Beta 1	January 26, 2016	First Firefox 45.0 Beta release.
		45.0	Firefox 45.0	March 8, 2016	Official Firefox 45.0 release.
		45.0.1	Firefox 45.0.1	March 16, 2016	Off-cycle stability update.[380]
		45.0.2	Firefox 45.0.2	April 11, 2016	Off-cycle stability update.[381] End-of-life 45.0.x product line on April 26, 2016.
		45.0esr	Firefox 45.0esr	March 8, 2016	Official Firefox 45.0 Extended Support Release (ESR).
		45.0.1esr	Firefox 45.0.1esr	March 16, 2016	Off-cycle stability update.[380]
		45.0.2esr	Firefox 45.0.2esr	April 11, 2016	Off-cycle stability update.[381]
		45.1.0esr	Firefox 45.1.0esr	April 26, 2016	Regular security and stability update.[382]
		45.1.1esr	Firefox 45.1.1esr	May 3, 2016	Off-cycle stability update.[383]
		45.2.0esr	Firefox 45.2.0esr	June 7, 2016	Regular security and stability update.[384]
		45.3.0esr	Firefox 45.3.0esr	August 2, 2016	Regular security and stability update.[385]
		45.4.0esr	Firefox 45.4.0esr	September 20, 2016	Regular security update.[386]
		45.5.0esr	Firefox 45.5.0esr	November 15, 2016	Regular security update.[387]
		45.5.1esr	Firefox 45.5.1esr	November 30, 2016	Off-cycle security update.[388] End-of-life 45.x.x ESR product line on June 13, 2017.
Firefox 46	46.0	46.0a1	Firefox 46.0 Nightly	December 15, 2015	First Firefox 46.0 Nightly build.
		46.0a2	Firefox 46.0 Developer Edition	January 26, 2016	First Firefox 46.0 Developer Edition build.
		46.0b1	Firefox 46.0 Beta 1	March 8, 2016	First Firefox 46.0 Beta release.
		46.0	Firefox 46.0	April 26, 2016	Official Firefox 46.0 release.
		46.0.1	Firefox 46.0.1	May 3, 2016	Off-cycle stability update.[389] End-of-life 46.0.x product line on June 7, 2016.
Firefox 47	47.0	47.0a1	Firefox 47.0 Nightly	January 26, 2016	First Firefox 47.0 Nightly build.
		47.0a2	Firefox 47.0 Developer Edition	March 8, 2016	First Firefox 47.0 Developer Edition build.
		47.0b1	Firefox 47.0 Beta 1	April 25, 2016	First Firefox 47.0 Beta release.
		47.0	Firefox 47.0	June 7, 2016	Official Firefox 47.0 release.
		47.0.1	Firefox 47.0.1	June 28, 2016	Off-cycle stability update.[390] End-of-life 47.0.x product line on August 2, 2016.
Firefox 48	48.0	48.0a1	Firefox 48.0 Nightly	March 8, 2016	First Firefox 48.0 Nightly build.
		48.0a2	Firefox 48.0 Developer Edition	April 25, 2016	First Firefox 48.0 Developer Edition build.
		48.0b1	Firefox 48.0 Beta 1	June 6, 2016	First Firefox 48.0 Beta release.
		48.0	Firefox 48.0	August 2, 2016	Official Firefox 48.0 release.[391]
		48.0.1	Firefox 48.0.1	August 18, 2016	Off-cycle stability update.[392]
		48.0.2	Firefox 48.0.2	August 24, 2016	Off-cycle stability update.[393] End-of-life 48.0.x product line on September 20, 2016.
Firefox 49	49.0	49.0a1	Firefox 49.0 Nightly	April 25, 2016	First Firefox 49.0 Nightly build.
		49.0a2	Firefox 49.0 Developer Edition	June 6, 2016	First Firefox 49.0 Developer Edition build.
		49.0b1	Firefox 49.0 Beta 1	August 1, 2016	First Firefox 49.0 Beta release.
		49.0	Firefox 49.0	September 20, 2016	Official Firefox 49.0 release.[394]
		49.0.1	Firefox 49.0.1	September 23, 2016	Off-cycle stability update.[395]
		49.0.2	Firefox 49.0.2	October 20, 2016	Off-cycle security and stability update.[396] End-of-life 49.0.x product line on November 15, 2016.
Firefox 50	50.0	50.0a1	Firefox 50.0 Nightly	June 6, 2016	First Firefox 50.0 Nightly build.
		50.0a2	Firefox 50.0 Developer Edition	August 1, 2016	First Firefox 50.0 Developer Edition build.
		50.0b1	Firefox 50.0 Beta 1	September 19, 2016	First Firefox 50.0 Beta release.
		50.0	Firefox 50.0	November 15, 2016	Official Firefox 50.0 release.[397]
		50.0.1	Firefox 50.0.1	November 28, 2016	Off-cycle security and stability update.[398]
		50.0.2	Firefox 50.0.2	November 30, 2016	Off-cycle security update.[399] End-of-life 50.0.x product line on January 24, 2017.
Firefox 51	51.0	51.0a1	Firefox 51.0 Nightly	August 1, 2016	First Firefox 51.0 Nightly build.[400]
		51.0a2	Firefox 51.0 Developer Edition	September 19, 2016	First Firefox 51.0 Developer Edition build.[400]
		51.0b1	Firefox 51.0 Beta 1	November 14, 2016	First Firefox 51.0 Beta release.[400]
		51.0	Firefox 51.0	January 24, 2017	Official Firefox 51.0 release.[400] End-of-life 51.0.x product line on March 7, 2017.
Firefox 52	52.0	52.0a1	Firefox 52.0 Nightly	September 19, 2016	First Firefox 52.0 Nightly build.[400]
		52.0a2	Firefox 52.0 Developer Edition	November 14, 2016	First Firefox 52.0 Developer Edition build.[400]
		52.0b1	Firefox 52.0 Beta 1	January 23, 2017	First Firefox 52.0 Beta Release.[400]
		52.0	Firefox 52.0	March 7, 2017	Official Firefox 52.0 release.[400] End-of-life 52.0.x product line on April 18, 2017.
Firefox 53	53.0	53.0a1	Firefox 53.0 Nightly	November 14, 2016	First Firefox 53.0 Nightly build.[400]
		53.0a2	Firefox 53.0 Developer Edition	January 23, 2017	First Firefox 53.0 Developer Edition build.[400]
		53.0b1	Firefox 53.0 Beta 1	March 6, 2017	First Firefox 53.0 Beta Release.[400]
		53.0	Firefox 53.0	April 18, 2017	Official Firefox 53.0 release.[400] End-of-life 53.0.x product line on June 13, 2017.
Firefox 54	54.0	54.0a1	Firefox 54.0 Nightly	January 23, 2017	First Firefox 54.0 Nightly build.[400]
		54.0a2	Firefox 54.0 Developer Edition	March 6, 2017	First Firefox 54.0 Developer Edition build.[400]
		54.0b1	Firefox 54.0 Beta 1	April 17, 2017	First Firefox 54.0 Beta Release.[400]
		54.0	Firefox 54.0	June 13, 2017	Official Firefox 54.0 release.[400] End-of-life 54.0.x product line on August 8, 2017.
Firefox 55	55.0	55.0a1	Firefox 55.0 Nightly	March 6, 2017	First Firefox 55.0 Nightly build.[400]
		55.0a2	Firefox 55.0 Developer Edition	April 17, 2017	First Firefox 55.0 Developer Edition build.[400]
		55.0b1	Firefox 55.0 Beta 1	June 12, 2017	First Firefox 55.0 Beta Release.[400]
		55.0	Firefox 55.0	August 8, 2017	Official Firefox 55.0 release.[400] End-of-life 55.0.x product line on October 3, 2017.
Firefox 56	56.0	56.0a1	Firefox 56.0 Nightly	April 17, 2017	First Firefox 56.0 Nightly build.[400]
		56.0a2	Firefox 56.0 Developer Edition	June 12, 2017	First Firefox 56.0 Developer Edition build.[400]
		56.0b1	Firefox 56.0 Beta 1	August 7, 2017	First Firefox 56.0 Beta Release.[400]
		56.0	Firefox 56.0	October 3, 2017	Official Firefox 56.0 release.[400] End-of-life 56.0.x product line on November 28, 2017.
Firefox 57	57.0	55.0a1	Firefox 57.0 Nightly	June 12, 2017	First Firefox 57.0 Nightly build.[400]
		57.0a2	Firefox 57.0 Developer Edition	August 7, 2017	First Firefox 57.0 Developer Edition build.[400]
		57.0b1	Firefox 57.0 Beta 1	October 2, 2017	First Firefox 57.0 Beta Release.[400]
		57.0	Firefox 57.0	November 28, 2017	Official Firefox 57.0 release.[400] End-of-life 57.0.x product line on January 22, 2018.
Firefox 58	58.0	58.0a1	Firefox 58.0 Nightly	August 7, 2017	First Firefox 58.0 Nightly build.[400]
		58.0a2	Firefox 58.0 Developer Edition	October 2, 2017	First Firefox 58.0 Developer Edition build.[400]
		58.0b1	Firefox 58.0 Beta 1	November 27, 2017	First Firefox 58.0 Beta Release.[400]
		58.0	Firefox 58.0	January 22, 2018	Official Firefox 58.0 release.[400]
Firefox 59	59.0	59.0a1	Firefox 59.0 Nightly	October 2, 2017	First Firefox 59.0 Nightly build.[400]
		59.0a2	Firefox 59.0 Developer Edition	November 27, 2017	First Firefox 59.0 Developer Edition build.[400]
		59.0b1	Firefox 59.0 Beta 1	January 21, 2018	First Firefox 59.0 Beta Release.[400]
Firefox 60	60.0	60.0a1	Firefox 60.0 Nightly	November 27, 2017	First Firefox 60.0 Nightly build.[400]
		60.0a2	Firefox 60.0 Developer Edition	January 21, 2018	First Firefox 60.0 Developer Edition build.[400]
Firefox 61	61.0	61.0a1	Firefox 61.0 Nightly	January 21, 2018	First Firefox 61.0 Nightly build.[400]

Former release

Former test release

Former release - still supported

Current supported official release

Current supported test release

Future official release

Future test release

Top

Mozilla Firefox timeline

Security Bug Bounty Program

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".^[401]

See also

• History of Firefox

Notes

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