Browser name | Gecko version | Version | Codename | Release date | Significant changes |
| Phoenix | 1.2 | 0.1 | Pescadero | September 23, 2002 | First release; customizable toolbar, quicksearch. |
| 0.2 | Santa Cruz | October 1, 2002 | Sidebar, extension management. | ||
| 0.3 | Lucia | October 14, 2002 | Image blocking, pop-up blocking whitelist, tabbed browsing. | ||
| 1.3 | 0.4 | Oceano | October 19, 2002 | Themes, pop-up blocking improvements, toolbar customization. | |
| 0.5 | Naples | December 7, 2002 | Multiple homepages, sidebar and accessibility improvements. | ||
| Firebird | 1.5 | 0.6 | Glendale | May 17, 2003 | New default theme (Qute), bookmark and privacy improvements, smooth scrolling, automatic image resizing. |
| 0.6.1 | July 28, 2003 | Bugfix release. | |||
| 0.7 | Indio | October 15, 2003 | Automatic scrolling, password manager, preferences panel improvements. | ||
| 0.7.1 | Three Kings | October 26, 2003 | Bugfix release (Mac OS X only). | ||
| Firefox | 1.6 | 0.8 | Royal Oak | February 9, 2004 | Windows installer, offline working, bookmarks and download manager improvements, rebranded with new logo. |
| 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). | |
| 0.9.1 | June 28, 2004 | Bugfix release, updated default theme. | |||
| 0.9.2 | July 8, 2004 | Vulnerability patch (Windows only). | |||
| 0.9.3 | August 4, 2004 | Vulnerability patch. | |||
| 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. | ||
| 0.10.1 | October 1, 2004 | Vulnerability patch. | |||
| 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. | ||
| 1.0.1 | Rose & Crown | February 24, 2005 | Regular security and stability update. | ||
| 1.0.2 | March 23, 2005 | Regular security and stability update. | |||
| 1.0.3 | April 15, 2005 | Regular security and stability update. Installer improvements. | |||
| 1.0.4 | May 11, 2005 | Regular security and stability update. Fix to DHTML errors encountered at some web sites. | |||
| 1.0.5 | July 12, 2005 | Regular security and stability update. | |||
| 1.0.6 | July 19, 2005 | Off-cycle stability update. Restore API compatibility for extensions and web applications that did not work in Firefox 1.0.5. | |||
| 1.0.7 | September 20, 2005 | Regular security and stability update. | |||
| 1.0.8 | April 13, 2006 | Regular security and stability update. 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. |
| 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. | ||
| 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). | ||
| 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. | ||
| 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. | ||
| 1.5.0.1 | February 1, 2006 | Regular security and stability update. | |||
| 1.5.0.2 | April 13, 2006 | Regular security and stability update. Native support for Intel-based Macintosh computers by shipping universal binary. | |||
| 1.5.0.3 | May 2, 2006 | Off-cycle security update. Fix for a publicly disclosed denial of service weakness. | |||
| 1.5.0.4 | June 1, 2006 | Regular security and stability update. | |||
| 1.5.0.5 | July 26, 2006 | Regular security and stability update. Added changes for Frisian locale (fy-NL). | |||
| 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. | |||
| 1.5.0.7 | September 14, 2006 | Regular security and stability update. | |||
| 1.5.0.8 | November 7, 2006 | Regular security and stability update. | |||
| 1.5.0.9 | December 19, 2006 | Regular security and stability update. | |||
| 1.5.0.10 | February 23, 2007 | Regular security and stability update. | |||
| 1.5.0.11 | March 20, 2007 | Regular security and stability update. Regression fixes. | |||
| 1.5.0.12 | May 30, 2007 | Regular security and stability update. 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. |
| 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. | ||
| 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. | ||
| 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. | ||
| 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). | ||
| 2.0 RC1 | Firefox 2.0 Release Candidate 1 | September 26, 2006 | First Firefox 2.0 release candidate. | ||
| 2.0 RC2 | Firefox 2.0 Release Candidate 2 | October 6, 2006 | Second Firefox 2.0 release candidate. | ||
| 2.0 RC3 | Firefox 2.0 Release Candidate 3 | October 16, 2006 | Third Firefox 2.0 release candidate. | ||
| 2.0 | Firefox 2.0 "Bon Echo" | October 24, 2006 | Official version 2.0 release, identical to 2.0 RC3. Official localized builds. | ||
| 2.0.0.1 | December 19, 2006 | Regular security and stability update. | |||
| 2.0.0.2 | February 23, 2007 | Regular security and stability update. | |||
| 2.0.0.3 | March 20, 2007 | Regular security and stability update. Regression fixes and security fixes. | |||
| 2.0.0.4 | May 30, 2007 | Regular security and stability update. | |||
| 2.0.0.5 | July 17, 2007 | Security and stability update. | |||
| 2.0.0.6 | July 30, 2007 | Regular security and stability update. | |||
| 2.0.0.7 | September 18, 2007 | Off-cycle security update. | |||
| 2.0.0.8 | October 18, 2007 | Regular security and stability update. Mac OS X 10.5 support. | |||
| 2.0.0.9 | November 1, 2007 | Off-cycle security and stability update. | |||
| 2.0.0.10 | November 26, 2007 | Off-cycle security and stability update. | |||
| 2.0.0.11 | November 30, 2007 | Off-cycle stability update. | |||
| 2.0.0.12 | February 7, 2008 | Regular security and stability update. | |||
| 2.0.0.13 | March 25, 2008 | Regular security and stability update. | |||
| 2.0.0.14 | April 16, 2008 | Off-cycle stability update. | |||
| 2.0.0.15 | July 1, 2008 | Regular security and stability update. | |||
| 2.0.0.16 | July 15, 2008 | Off-cycle security update. | |||
| 2.0.0.17 | September 23, 2008 | Regular security and stability update. | |||
| 2.0.0.18 | November 12, 2008 | Regular security and stability update. | |||
| 2.0.0.19 | December 16, 2008 | Regular security and stability update. | |||
| 2.0.0.20 | December 18, 2008 | Off-cycle security update. 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. |
| 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. | ||
| 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. | ||
| 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. | ||
| 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. | ||
| 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. | ||
| 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 OS X 10.3 no longer supported for Gecko 1.9. General bug fixes. | ||
| 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. | ||
| 3.0b1 | Firefox 3.0 Beta 1 | November 19, 2007 | First Firefox 3.0 beta release. | ||
| 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. | ||
| 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. | ||
| 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. | ||
| 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. | ||
| 3.0 RC1 | Firefox 3.0 Release Candidate 1 | May 16, 2008 | First Firefox 3.0 release candidate. | ||
| 3.0 RC2 | Firefox 3.0 Release Candidate 2 | June 5, 2008 | Second Firefox 3.0 release candidate. | ||
| 3.0 RC3 | Firefox 3.0 Release Candidate 3 | June 11, 2008 | Third Firefox 3.0 release candidate. | ||
| 3.0 | Firefox 3.0 "Gran Paradiso" | June 17, 2008 | Official version 3.0 release. | ||
| 3.0.1 | July 16, 2008 | Security and stability update. | |||
| 3.0.2 | September 23, 2008 | Regular security and stability update. | |||
| 3.0.3 | September 26, 2008 | Bug fix for retrieving and saving passwords. | |||
| 3.0.4 | November 12, 2008 | Regular security and stability update. | |||
| 3.0.5 | December 16, 2008 | Regular security and stability update. | |||
| 3.0.6 | February 3, 2009 | Regular security and stability update. | |||
| 3.0.7 | March 4, 2009 | Regular security and stability update. | |||
| 3.0.8 | March 27, 2009 | Off-cycle security update. | |||
| 3.0.9 | April 21, 2009 | Regular security and stability update. | |||
| 3.0.10 | April 27, 2009 | Off-cycle stability update. | |||
| 3.0.11 | June 11, 2009 | Regular security and stability update. | |||
| 3.0.12 | July 21, 2009 | Regular security and stability update. | |||
| 3.0.13 | August 3, 2009 | Regular security and stability update. | |||
| 3.0.14 | September 9, 2009 | Regular security and stability update. | |||
| 3.0.15 | October 27, 2009 | Regular security and stability update. | |||
| 3.0.16 | December 15, 2009 | Regular security and stability update. | |||
| 3.0.17 | January 5, 2010 | Off-cycle stability update. | |||
| 3.0.18 | February 17, 2010 | Regular security and stability update. | |||
| 3.0.19 | March 30, 2010 | Regular security and stability update. 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 |
| 3.1a2 | Shiretoko Alpha 2 | September 5, 2008 | Second Firefox 3.1 alpha release. | ||
| 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. | ||
| 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. | ||
| 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 | ||
| 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 | ||
| 3.5b99 | Firefox 3.5 Preview | June 8, 2009 | Preview for Firefox 3.5, pre-release candidate. | ||
| 3.5 RC1 | Firefox 3.5 Release Candidate 1 | June 16, 2009 | First Firefox 3.5 release candidate. | ||
| 3.5 RC2 | Firefox 3.5 Release Candidate 2 | June 19, 2009 | Second Firefox 3.5 release candidate. | ||
| 3.5 RC3 | Firefox 3.5 Release Candidate 3 | June 24, 2009 | Third Firefox 3.5 release candidate. | ||
| 3.5 | Firefox 3.5 "Shiretoko" | June 30, 2009 | Official version 3.5 release. Identical to 3.5 RC3. | ||
| 3.5.1 | July 16, 2009 | Off-cycle security and stability update. | |||
| 3.5.2 | August 3, 2009 | Regular security and stability update. | |||
| 3.5.3 | September 9, 2009 | Regular security and stability update. | |||
| 3.5.4 | October 27, 2009 | Regular security and stability update. | |||
| 3.5.5 | November 5, 2009 | Off-cycle security and stability update. | |||
| 3.5.6 | December 15, 2009 | Regular security and stability update. | |||
| 3.5.7 | January 5, 2010 | Off-cycle stability update. | |||
| 3.5.8 | February 17, 2010 | Regular security and stability update. | |||
| 3.5.9 | March 30, 2010 | Regular security and stability update. | |||
| 3.5.10 | June 22, 2010 | Regular security and stability update. | |||
| 3.5.11 | July 20, 2010 | Regular security and stability update. | |||
| 3.5.12 | September 7, 2010 | Regular security and stability update. | |||
| 3.5.13 | September 15, 2010 | Off-cycle stability update. | |||
| 3.5.14 | October 19, 2010 | Regular security and stability update. | |||
| 3.5.15 | October 27, 2010 | Off-cycle security update. | |||
| 3.5.16 | December 9, 2010 | Regular security and stability update. | |||
| 3.5.17 | March 1, 2011 | Regular security and stability update. | |||
| 3.5.18 | March 22, 2011 | Off-cycle security update. Blacklists a few invalid HTTPS certificates. | |||
| 3.5.19 | April 28, 2011 | Regular security and stability update. 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. |
| 3.6b1 | Firefox 3.6 Beta 1 | October 30, 2009 | First Firefox 3.6 beta release. | ||
| 3.6b2 | Firefox 3.6 Beta 2 | November 10, 2009 | Second Firefox 3.6 beta release. | ||
| 3.6b3 | Firefox 3.6 Beta 3 | November 17, 2009 | Third Firefox 3.6 beta release. | ||
| 3.6b4 | Firefox 3.6 Beta 4 | November 26, 2009 | Fourth Firefox 3.6 beta release. | ||
| 3.6b5 | Firefox 3.6 Beta 5 | December 17, 2009 | Fifth Firefox 3.6 beta release. | ||
| 3.6 RC1 | Firefox 3.6 Release Candidate 1 | January 8, 2010 | First Firefox 3.6 release candidate. | ||
| 3.6 RC2 | Firefox 3.6 Release Candidate 2 | January 17, 2010 | Second Firefox 3.6 release candidate. | ||
| 3.6 | Firefox 3.6 "Namoroka" | January 21, 2010 | Official Firefox 3.6 release. Identical to 3.6 RC2. | ||
| 3.6.2 | March 22, 2010 | Security and stability update. | |||
| 3.6.3 | April 1, 2010 | Quick turn-around security update. | |||
| 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". | ||
| 3.6.4 | Firefox 3.6.4 (OOPP) "Lorentz" | June 22, 2010 | Regular security and stability update, including OOPP. | ||
| 3.6.6 | 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. | |||
| 3.6.7 | July 20, 2010 | Regular security and stability update. | |||
| 3.6.8 | July 23, 2010 | Off-cycle stability update. | |||
| 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. | |||
| 3.6.10 | September 15, 2010 | Off-cycle stability update. | |||
| 3.6.11 | October 19, 2010 | Regular security and stability update. | |||
| 3.6.12 | October 27, 2010 | Off-cycle security update. | |||
| 3.6.13 | December 9, 2010 | Regular security and stability update. | |||
| 3.6.14 | March 1, 2011 | Regular security and stability update. | |||
| 3.6.15 | March 4, 2011 | Off-cycle stability update. Fixed issue where some Java applets failed to load in Firefox 3.6.14. | |||
| 3.6.16 | March 22, 2011 | Off-cycle security update. Blacklists a few invalid HTTPS certificates. | |||
| 3.6.17 | April 28, 2011 | Regular security and stability update. | |||
| 3.6.18 | June 21, 2011 | Regular security and stability update. | |||
| 3.6.19 | July 11, 2011 | Off-cycle stability update. | |||
| 3.6.20 | August 16, 2011 | Regular security and stability update. | |||
| Firefox 4 | 1.9.3 | 3.7a1 | Mozilla Developer Preview 3.7 Alpha 1 | February 10, 2010 | First Firefox 3.7 alpha release. |
| 3.7a2 | Mozilla Developer Preview 3.7 Alpha 2 | March 3, 2010 | Second Firefox 3.7 alpha release. | ||
| 3.7a3 | Mozilla Developer Preview 3.7 Alpha 3 | March 17, 2010 | Third Firefox 3.7 alpha release. | ||
| 3.7a4 | Mozilla Developer Preview 3.7 Alpha 4 | April 12, 2010 | Fourth Firefox 3.7 alpha release. | ||
| 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. | ||
| 2.0 | 4.0b1 | Firefox 4.0 Beta 1 | July 6, 2010 | First Firefox 4.0 beta release. | |
| 4.0b2 | Firefox 4.0 Beta 2 | July 27, 2010 | Second Firefox 4.0 beta release. | ||
| 4.0b3 | Firefox 4.0 Beta 3 | August 11, 2010 | Third Firefox 4.0 beta release. | ||
| 4.0b4 | Firefox 4.0 Beta 4 | August 24, 2010 | Fourth Firefox 4.0 beta release. | ||
| 4.0b5 | Firefox 4.0 Beta 5 | September 7, 2010 | Fifth Firefox 4.0 beta release. | ||
| 4.0b6 | Firefox 4.0 Beta 6 | September 14, 2010 | Sixth Firefox 4.0 beta release. | ||
| 4.0b7 | Firefox 4.0 Beta 7 | November 10, 2010 | Seventh Firefox 4.0 beta release. | ||
| 4.0b8 | Firefox 4.0 Beta 8 | December 21, 2010 | Eighth Firefox 4.0 beta release. | ||
| 4.0b9 | Firefox 4.0 Beta 9 | January 14, 2011 | Ninth Firefox 4.0 beta release. | ||
| 4.0b10 | Firefox 4.0 Beta 10 | January 25, 2011 | Tenth Firefox 4.0 beta release. | ||
| 4.0b11 | Firefox 4.0 Beta 11 | February 8, 2011 | Eleventh Firefox 4.0 beta release. | ||
| 4.0b12 | Firefox 4.0 Beta 12 | February 25, 2011 | Twelfth Firefox 4.0 beta release. | ||
| 4.0 RC1 | Firefox 4.0 Release Candidate 1 | March 9, 2011 | First Firefox 4.0 release candidate. | ||
| 4.0 RC2 | Firefox 4.0 Release Candidate 2 | March 18, 2011 | Second Firefox 4.0 release candidate. | ||
| 4.0 | Firefox 4.0 "Tumucumaque" | March 22, 2011 | Official Firefox 4.0 release. Identical to 4.0 RC2. | ||
| 4.0.1 | Firefox 4.0.1 "Macaw" | April 28, 2011 | Regular security and stability update. | ||
| Firefox 5 | 5.0 | 5.0a2 | Firefox 5.0 Aurora | April 13, 2011 | First Firefox 5.0 Aurora build. |
| 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. | ||
| 5.0b2 | Firefox 5.0 Beta 2 | May 20, 2011 | First Firefox 5.0 Beta release. | ||
| 5.0b3 | Firefox 5.0 Beta 3 | June 1, 2011 | Second Firefox 5.0 Beta release. | ||
| 5.0b5 | 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. | ||
| 5.0.1 | Firefox 5.0.1 | July 11, 2011 | Off-cycle stability update. | ||
| Firefox 6 | 6.0 | 6.0a1 | Firefox 6.0 Nightly | April 13, 2011 | First Firefox 6.0 Nightly build. |
| 6.0a2 | Firefox 6.0 Aurora | May 25, 2011 | First Firefox 6.0 Aurora build. | ||
| 6.0b1 | Firefox 6.0 Beta 1 | July 8, 2011 | First Firefox 6.0 Beta release. | ||
| 6.0b2 | Firefox 6.0 Beta 2 | July 15, 2011 | Second Firefox 6.0 Beta release. | ||
| 6.0b3 | Firefox 6.0 Beta 3 | July 25, 2011 | Third Firefox 6.0 Beta release. | ||
| 6.0 | Firefox 6.0 | August 16, 2011 | Official Firefox 6.0 release. | ||
| Firefox 7 | 7.0 | 7.0a1 | Firefox 7.0 Nightly | May 25, 2011 | First Firefox 7.0 Nightly build. |
| 7.0a2 | Firefox 7.0 Aurora | July 6, 2011 | First Firefox 7.0 Aurora build. | ||
| 7.0b1 | Firefox 7.0 Beta 1 | August 16, 2011 | First Firefox 7.0 Beta release. | ||
| 7.0 | Firefox 7.0 | September 27, 2011 | Official Firefox 7.0 release. | ||
| Firefox 8 | 8.0 | 8.0a1 | Firefox 8.0 Nightly | July 6, 2011 | First Firefox 8.0 Nightly build. |
| 8.0a2 | Firefox 8.0 Aurora | August 16, 2011 | First Firefox 8.0 Aurora build. | ||
| 8.0b1 | Firefox 8.0 Beta 1 | September 27, 2011 | First Firefox 8.0 Beta release. | ||
| 8.0 | Firefox 8.0 | November 8, 2011 | Official Firefox 8.0 release. | ||
Browser name | Gecko version | Version | Codename | Release date | Significant changes |
Notes :
- There was no version 3.6.1.
- There was no version 3.6.5.
- Builds of version 5.0b4 were created, but not released.
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