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User:Jake01756/sandbox/firefox version history

{{Short description|none}}

{{for|specific features|Features of Firefox}}

{{Cleanup reorganize|date=November 2021}}

{{Overly detailed|details=|date=November 2022}}

{{Use mdy dates |date=September 2018}}

{{Firefox usage share}}

Firefox was created by Dave Hyatt and Blake Ross as an experimental branch of the Mozilla browser, first released as Firefox 1.0 on November 9, 2004. Starting with version 5.0, a rapid release cycle was put into effect, resulting in a new major version release every six weeks. This was gradually accelerated further in late 2019, so that new major releases occur on four-week cycles starting in 2020.{{cite web |last1=Kothari |first1=Ritu |last2=Or |first2=Yan |title=Moving Firefox to a faster 4-week release cycle |url=https://hacks.mozilla.org/2019/09/moving-firefox-to-a-faster-4-week-release-cycle/ |website=Mozilla Hacks |access-date=26 February 2020}}

Current and future releases

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{{Column}}

= Current supported official releases =

:*Firefox 107.0.1

:*Firefox 107.0 (Android)

:*Firefox 102.5.0 ESR

{{Column}}

= Current supported test releases =

:*Firefox 108.0 Developer Edition

:*Firefox 108.0 Beta

:*Firefox 109.0 Nightly

{{Columns-end}}

{{Columns-start|num=2|width=800px;}}

{{Column}}

= Future official releases =

;Rapid

:*Firefox 108.0

:*Firefox 109.0

:*Firefox 110.0

:*Firefox 111.0

:*Firefox 112.0

:*Firefox 113.0

:*Firefox 114.0

:*Firefox 115.0

:*Firefox 116.0

:*Firefox 117.0

:*Firefox 118.0

:*Firefox 119.0

:*Firefox 120.0

:*Firefox 121.0

;ESR

:*Firefox 102.6 ESR

:*Firefox 102.7 ESR

:*Firefox 102.8 ESR

:*Firefox 102.9 ESR

:*Firefox 102.10 ESR

:*Firefox 102.11 ESR

:*Firefox 102.12 ESR

:*Firefox 102.13 ESR

:*Firefox 102.14 ESR

:*Firefox 102.15 ESR

:*Firefox 115.0 ESR

:*Firefox 115.1 ESR

:*Firefox 115.2 ESR

:*Firefox 115.3 ESR

:*Firefox 115.4 ESR

:*Firefox 115.5 ESR

:*Firefox 115.6 ESR

{{Column|width=400px;}}

= Future test releases =

:*Firefox 109.0 Developer Edition

:*Firefox 109.0 Beta

:*Firefox 110.0 Nightly

:*Firefox 110.0 Developer Edition

:*Firefox 110.0 Beta

:*Firefox 111.0 Nightly

:*Firefox 111.0 Developer Edition

:*Firefox 111.0 Beta

:*Firefox 112.0 Nightly

:*Firefox 112.0 Developer Edition

:*Firefox 112.0 Beta

:*Firefox 113.0 Nightly

:*Firefox 113.0 Developer Edition

:*Firefox 113.0 Beta

:*Firefox 114.0 Nightly

:*Firefox 114.0 Developer Edition

:*Firefox 114.0 Beta

:*Firefox 115.0 Nightly

:*Firefox 115.0 Developer Edition

:*Firefox 115.0 Beta

:*Firefox 116.0 Nightly

:*Firefox 116.0 Developer Edition

:*Firefox 116.0 Beta

:*Firefox 117.0 Nightly

:*Firefox 117.0 Developer Edition

:*Firefox 117.0 Beta

:*Firefox 118.0 Nightly

:*Firefox 118.0 Developer Edition

:*Firefox 118.0 Beta

:*Firefox 119.0 Nightly

:*Firefox 119.0 Developer Edition

:*Firefox 119.0 Beta

:*Firefox 120.0 Nightly

:*Firefox 120.0 Developer Edition

:*Firefox 120.0 Beta

:*Firefox 121.0 Nightly

:*Firefox 121.0 Developer Edition

:*Firefox 121.0 Beta

:*Firefox 122.0 Nightly

:*Firefox 122.0 Developer Edition

:*Firefox 122.0 Beta

:*Firefox 123.0 Nightly

{{Columns-end}}

Early versions

{{main|Firefox early version history}}

Rapid releases

In April 2011, the development process was split into several "channels", each working on a build in a different stage of development. The most recent available build is called "Nightly Builds" and offers the latest, untested features and updates. The "Aurora" build is up to six weeks behind "Nightly" and offers functionality that has undergone basic testing. As of version 35, the "Aurora" channel has been renamed to the "Developer Edition" channel.{{cite web |url=https://www.mozilla.org/en-US/firefox/35.0a2/auroranotes/ |title=Firefox – Aurora Notes (35.0a2) |date=2014-11-10 |access-date=2014-11-21|quote=Version 35.0a2, first offered to Firefox Developer Edition users on November 10, 2014}}{{cite web |url=https://bugzilla.mozilla.org/show_bug.cgi?id=1072181 |title=Bug 1072181 - Investigate tweaking aurora for developers |access-date=2014-11-21}} The "Beta" channel is up to six weeks behind the "Aurora" build, for up to about twelve weeks compared to the most recent "Nightly" build. The "Beta" channel provides improved stability over the "Nightly" builds and is the first development milestone that has the "Firefox" logo. "Release" is the current official version of Firefox. Gecko version numbering is the same as the Firefox build version number, starting with 5.0 on Firefox 5.

The stated aim of this faster-paced process is to get new features to users faster.{{cite web |title=Mozilla Firefox: Development Process |publisher=Mozilla |date=April 7, 2011 |url=https://mozilla.github.com/process-releases/draft/development_specifics/ |access-date=April 16, 2011}} This accelerated release cycle was met with criticism by users, as it often broke add-on compatibility,{{cite web |title=firefox is updating way too often |website=support.mozilla.org |url=https://support.mozilla.org/en-US/questions/886836}} as well as those who believe Firefox was simply trying to increase its version number to compare with other browsers such as Google Chrome.{{cite news |title=Mozilla goes version number crazy |website=ZDNet |url=https://www.zdnet.com/article/mozilla-goes-version-number-crazy/ |access-date=April 7, 2012}}

= Firefox 5 through 9 {{anchor|Firefox 5}}=

Firefox 5 was released on June 21, 2011,{{cite web |title=Firefox 5.0 release notes |website=Mozilla |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/5.0/releasenotes/ |access-date=2013-11-19}} three months after the major release of Firefox 4. Firefox 5 is the first release in Mozilla's new rapid release plan, matching Google Chrome's rapid release schedule and rapid version number increments.{{cite news |last=Bright |first=Peter |title=Firefox update policy: the enterprise is wrong, not Mozilla |website=Ars Technica |date=June 27, 2011 |url= https://arstechnica.com/business/news/2011/06/firefox-update-policy-the-enterprise-is-wrong-not-mozilla.ars |access-date=2013-11-19}} Firefox 5 has significantly improved the speed of web-related tasks, such as loading pages with combo boxes or MathML. Mozilla also integrated the HTML5 video WebM standard into the browser, allowing playback of WebM videos.{{cite web |title=Firefox Release Tracking |website=Mozilla Wiki |publisher=Mozilla |url=https://wiki.mozilla.org/Features/Release_Tracking/Archives#Firefox_5 |access-date=April 21, 2012}}

Firefox 6 was released on August 16, 2011, introducing a permissions manager, new address bar highlighting (the domain name is black while the rest of the URL is gray{{cite web |title=Classic Compact Options |website=addons.mozilla.org [Add-ons for Firefox] |publisher=Mozilla |url=https://addons.mozilla.org/en-us/firefox/addon/classic-compact-options/ |access-date=February 1, 2012 |url-status=dead |archive-url=https://web.archive.org/web/20120502164326/https://addons.mozilla.org/en-US/firefox/addon/classic-compact-options/ |archive-date=May 2, 2012}}), streamlining the look of the site identity block, a quicker startup time, a ScratchPad JavaScript compiler, and many other new features. This update also brought the infamous feature that caused JavaScript entered in the address bar to not run.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/6.0/releasenotes/ |title=Mozilla Firefox 6 Release Notes |publisher=Mozilla |access-date=February 1, 2012 |date=August 16, 2011}}

Firefox 7 was released on September 27, 2011,{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/7.0/releasenotes/ |title=Mozilla Firefox 7.0 Release Notes |publisher=Mozilla |date=2011-09-27 |access-date=2012-02-07}} and uses as much as 50% less RAM than Firefox 4 as a result of the MemShrink project to reduce Firefox memory usage.{{cite web |url=https://blog.mozilla.org/nnethercote/2011/08/09/firefox-7-is-lean-and-fast-2/ |title=Firefox 7 is lean and fast |first=Nicholas|last=Nethercote |date=August 9, 2011 |access-date=August 17, 2011}}{{cite web |url=https://wiki.mozilla.org/Performance/MemShrink |title=Performance/MemShrink |publisher=Mozilla |access-date=August 11, 2011}}{{cite web |last=Mello |first=John P. |url=https://www.pcworld.com/article/238504/firefox_7_beta_puts_priority_on_performance.html |title=Firefox 7 Beta Puts Priority on Performance |website=PC World |date=August 19, 2011 |access-date=April 7, 2012}}

Firefox 7.0.1 was released a few days later, fixing a rare, but serious, issue with add-ons not being detected by the browser.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/7.0.1/releasenotes/ |title=Mozilla Firefox 7.0.1 Release Notes |publisher=Mozilla |access-date=October 3, 2011}} Some URLs are trimmed in the address bar, so the "http://" scheme no longer appears, but "https://" is still displayed. Trailing slashes on domains are also hidden, for example: https://www.example.org/ becomes https://www.example.org.{{cite web |title=browser.urlbar.trimURLs |url=https://developer.mozilla.org/en-US/docs/Mozilla/Preferences/Preference_reference/browser.urlbar.trimURLs |website=MDN web docs |publisher=Mozilla |access-date=31 January 2019 |archive-date=April 22, 2019 |archive-url=https://web.archive.org/web/20190422194805/https://developer.mozilla.org/en-US/docs/Mozilla/Preferences/Preference_reference/browser.urlbar.trimURLs |url-status=dead }}

Firefox 8 was released on November 8, 2011{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/8.0/releasenotes/ |title=Mozilla Firefox 8.0 Release Notes |publisher=Mozilla |date=2011-11-08 |access-date=10 November 2011}} and prompts users about any previously installed add-ons. Upon installation, a dialog box prompted users to enable or disable the add-ons. Add-ons installed by third-party programs were disabled by default, but user-installed add-ons were enabled by default. Mozilla judged that third-party-installed add-ons were problematic, taking away user control, lagging behind on compatibility and security updates, slowing down Firefox startup and page loading time, and cluttering the interface with unused toolbars.{{cite web |url=https://www.cnet.com/news/firefox-8-cracks-down-on-add-ons/ |title=Firefox 8 cracks down on add-ons |website=cnet |date=November 9, 2011 |access-date=September 17, 2021}}

{{anchor|Firefox 9}}

Firefox 9 was released on December 20, 2011, includes various new features such as Type Inference, which boosts JavaScript performance up to 30%, improved theme integration for Mac OS X Lion, added two-finger swipe navigation for Mac OS X Lion, added support for querying Do Not Track status via JavaScript, added support for font-stretch, improved support for text-overflow, improved standards support for HTML5, MathML, and CSS, and fixed several security problems. It also features a large list of bug fixes.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/9.0/releasenotes/ |title=Mozilla Firefox Release Notes |website=mozilla.org |date=December 20, 2011 |access-date=March 17, 2012}}

class="wikitable mw-collapsible mw-collapsed" style="width:100%; font-size:88%;"

! colspan="3"| Release history of Firefox 5–9

Version

! Release date{{cite web |url=https://wiki.mozilla.org/Releases |title=Releases |website=wiki.mozilla.org |date=2012-01-31 |access-date=February 7, 2014}}

! Release type and highlightsFeatures highlighted may exist in beta stages prior to an official release build of the immediate version, or in an incremental minor version build prior to the last one.

5.0

| June 21, 2011

| Official Firefox 5.0 release.

  • Better standards support for HTML5, CSS3, MathML, XHR, and SMIL
  • Better visibility for the Do not track header preference
  • Stability and security improvements{{cite web |url=https://hexus.net/tech/news/software/30901-firefox-5-heading-way/ |title=News: Firefox 5 heading your way |website=HEXUS.net |date=20 June 2011 |access-date=June 20, 2011}}{{cite web |title=Firefox 5 for developers |series=MDC Docs Firefox 5 for developers |website=Mozilla Developer Network |url=https://developer.mozilla.org/en/firefox_5_for_developers |access-date=2011-06-17 |archive-date=May 20, 2012 |archive-url=https://web.archive.org/web/20120520111158/https://developer.mozilla.org/en/firefox_5_for_developers |url-status=dead }}{{cite web |title=Firefox Beta release notes |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/5.0beta/releasenotes/ |publisher=Mozilla Foundation |access-date=17 June 2011}}
  • Better tuned HTTP idle connection logic{{cite web |url=http://mashable.com/2011/06/21/firefox-5/ |title=Firefox 5 Available for Download |website=Mashable |date=June 21, 2011 |access-date=June 22, 2011}}
  • Improved canvas, JavaScript, memory, and networking performance
  • Improved spell checking for some locales
  • Improved desktop environment integration for Linux users
  • Better WebGL security (WebGL content can no longer load cross-domain textures).{{cite news |last=Marshall |first=Gary |title=Hands on: Firefox 5 review |url=https://www.techradar.com/news/software/applications/hands-on-firefox-5-review-969338 |access-date=June 23, 2011 |date=June 22, 2011 |website=TechRadar}}
  • Background tabs have setTimeout and setInterval clamped to 1000 ms to improve performance{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/5.0/releasenotes/ |title=Mozilla Firefox Release Notes |website=mozilla.org |date=June 21, 2011 |access-date=February 7, 2012}}
  • Gecko version number bumped to 5.0 to match (and from then on stay synced to) Firefox's major version number.{{cite web |title=Gecko versions and application versions |website=Mozilla Developer Network |url=https://developer.mozilla.org/en-US/docs/Mozilla/Gecko/Versions |access-date=2013-11-18 |url-status=dead |archive-url=https://web.archive.org/web/20210302140259/https://developer.mozilla.org/en-US/docs/Mozilla/Gecko/Versions |archive-date=2021-03-02}}
  • 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.
5.0.1

| July 11, 2011

| Off-cycle stability update for Mac OS X only.

  • Fixed an issue in Mac OS X 10.7 that could cause Firefox to crash{{cite web |url=https://blog.mozilla.org/products/2011/07/08/firefox-5-minor-update-for-mac-coming-soon/ |title=Firefox 5 minor update for Mac coming soon |website=The Mozilla Blog |date=July 8, 2011 |access-date=April 22, 2012 |url-status=dead |archive-url=https://web.archive.org/web/20121221075954/https://blog.mozilla.org/products/2011/07/08/firefox-5-minor-update-for-mac-coming-soon/ |archive-date=December 21, 2012}}
  • Fixed an issue caused by Apple's "Java for Mac OS X 10.6 Update 5" where the Java plugin would not be loaded{{cite web |url=https://www.mozilla.org/en-US/firefox/5.0.1/releasenotes/ |title=Mozilla Firefox 5.0.1 Release Notes |publisher=Mozilla |date=July 11, 2011 |access-date=April 22, 2012}}

[https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 5.0.x product line] on August 16, 2011.

6.0

| August 16, 2011

| Official Firefox 6.0 release.

  • about:permissions, a permissions manager. The user can choose what information can be shared with sites, e.g. location.
  • 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.
6.0.1

| August 30, 2011

| Off-cycle security update.

  • Revoked the root certificate for DigiNotar due to fraudulent SSL certificate issuance.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/6.0.1/releasenotes/ |title=Mozilla Firefox 6.0.1 Release Notes |publisher=Mozilla |date=2011-08-30 |access-date=April 22, 2012}}
6.0.2

| September 6, 2011

| Off-cycle security update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/6.0.2/releasenotes/ |title=Mozilla Firefox 6.0.2 Release Notes |publisher=Mozilla |date=2011-09-06 |access-date=April 22, 2012}}

  • Removed trust exceptions for certificates issued by Staat der Nederlanden
  • Resolved an issue with gov.uk websites.
  • Last release for Android 2.0

[https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 6.0.x product line] on September 27, 2011.

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.
  • Fixed several security and stability issues.
7.0.1

| September 29, 2011

| Off-cycle security and stability update.

  • Fixed a rare issue where some users could find one or more of their add-ons hidden after a Firefox update.
  • Last release for Maemo.

[https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 7.0.x product line] on November 8, 2011.

8.0

| November 8, 2011

| Official Firefox 8.0 release.

  • Add-ons installed by third-party programs are now disabled by default.
  • Added a one-time add-on selection dialog to manage previously installed add-ons.
  • Added Twitter to the search bar.
  • Added a preference to load tabs on demand, improving startup time when windows are restored.
  • Improved performance and memory handling when using
  • Added Cross-Origin Resource Sharing (CORS) support for cross-domain textures in WebGL.
  • Added support for HTML5 context menus.
  • Added support for insertAdjacentHTML().
  • Improved CSS hyphen support for many languages.
  • Improved WebSocket support.

Changes during betas

  • Removed support for new tab animation due to incompatibilities with some extensions.
8.0.1

| November 21, 2011

| Off-cycle security and stability update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/8.0.1/releasenotes/ |title=Mozilla Firefox 8.0.1 Release Notes |publisher=Mozilla |date=2011-11-21 |access-date=2011-11-25}}

  • Fixed Mac OS X crash that occurred in certain instances when a Java Applet is loaded with Java SE 6 version 1.6.0_29 installed.
  • Fixed Windows startup crash caused by RoboForm versions older than 7.6.2.

[https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 8.0.x product line] on December 20, 2011.

9.0

|December 20, 2011

|Official Firefox 9.0 release.

  • Added type inference, significantly improving JavaScript performance.
  • Improved theme integration for Mac OS X Lion.
  • Added two finger swipe navigation for Mac OS X Lion.
  • Added support for querying Do Not Track status via JavaScript.
  • Added support for the font-stretch CSS property.
  • Improved support for the text-overflow CSS property.
  • Improved standards support for HTML5, MathML, and CSS.
9.0.1

|December 21, 2011

|Off-cycle security and stability update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/9.0.1/releasenotes/ |title=Mozilla Firefox 9.0.1 Release Notes |publisher=Mozilla |date=2011-12-21 |access-date=2011-12-22}}

  • Fixed crash on Windows, Mac and Linux.

[https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 9.0.x product line] on January 31, 2012.

= Firefox 10 through 16 =

Firefox 10 and Firefox ESR 10 were released on January 31, 2012.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/10.0/releasenotes/ |title=Mozilla Firefox 10.0 Release Notes |publisher=Mozilla |date=2012-01-31 |access-date=2012-01-31}}{{cite web |url=https://wiki.mozilla.org/Enterprise/Firefox/ExtendedSupport:Proposal |title=Mozilla Firefox Extended Support Release Proposal |publisher=Mozilla |date=2012-01-18 |access-date=2012-01-25}} Firefox 10 added a full screen API and improved WebGL performance, support for CSS 3D Transforms and for anti-aliasing in the WebGL standard for hardware-accelerated 3D graphics. These WebGL updates mean that more complex site and Web app animations can render smoothly in Firefox, and that developers can animate 2D objects into 3D without plug-ins.{{cite web |url=https://www.zdnet.com/article/firefox-10-eases-add-on-updates-but-no-android-yet/ |title=Firefox 10 eases add-on updates but no Android yet |author=zebra148 |website=ZDNet |date=February 2, 2012 |access-date=May 5, 2019}}{{cite web |url=https://arstechnica.com/information-technology/2012/01/firefox-10-arrives-with-new-dev-tools-and-full-screen-api/ |title=Firefox 10 arrives with new dev tools and full-screen API |last=Paul |first=Ryan |website=Ars Technica |date=January 31, 2012 |access-date=May 5, 2019}} It also introduced a new CSS Style Inspector, which allow users to check out a site's structure and edit the CSS without leaving the browser. Firefox 10 assumed all add-ons made for at least Firefox 4 were compatible. The add-on developer is able to alert Mozilla that the add-on is incompatible, overriding compatibility with version 10 or later. This new rule also does not apply to themes.{{cite web |url=https://wiki.mozilla.org/Features/Add-ons/Add-ons_Default_to_Compatible |title=Add-ons default to compatible |last=Scott |first=Justin |publisher=Mozilla |access-date=April 21, 2012}}

Firefox 10 ESR is the first Extended Support Release (ESR) as previously on January 10, 2012, where the Mozilla Foundation announced the availability of an ESR version of Firefox.{{cite news |url=https://blog.mozilla.org/blog/2012/01/10/delivering-a-mozilla-firefox-extended-support-release/ |title=Delivering a Mozilla Firefox Extended Support Release |date=January 10, 2012 |access-date=February 4, 2012}} Firefox ESR is intended for groups who deploy and maintain the desktop environment in large organizations such as universities and other schools, county or city governments and businesses. During the extended cycle, no new features will be added to a Firefox ESR; only high-risk/high-impact security vulnerabilities or major stability issues will be corrected.{{cite web |url=https://www.mozilla.org/en-US/firefox/organizations/ |title=Mozilla Firefox ESR Overview |publisher=Mozilla Foundation |access-date=October 2, 2012}}

File:Firefox 3D tilt.png

Firefox 11 was released on March 13, 2012. Firefox 11 introduced many new features, including migration of bookmarks and history from Google Chrome,{{cite web |last=Lowe |first=Alistair |url=https://hexus.net/business/news/internet/36525-mozilla-launches-firefox-11-now-chrome-migration/ |title=Mozilla launches Firefox 11, now with Chrome migration |website=HEXUS.net |date=March 14, 2012 |access-date=June 20, 2013}} SPDY integrated services, {{visible anchor|3Dinspector|text=Page Inspector Tilt (3D View)}}, Add-on Sync, redesigned HTML5 video controls, and the Style Editor (CSS).{{cite web |url=https://wiki.mozilla.org/Releases/Firefox_11/Test_Plan |title=Mozilla Firefox 11 test plan |publisher=Mozilla |access-date=March 13, 2012}} The update also fixed many bugs, and improved developer tools.{{cite web |url=https://www.mozilla.org/en-US/firefox/11.0/releasenotes |title=Firefox 11 Release Notes |publisher=Mozilla |access-date=March 13, 2012}}

Firefox 12 was released on April 24, 2012. Firefox 12 introduced few new features, but it made many changes and laid the ground work for future releases. Firefox 12 for Windows added the Mozilla Maintenance Service which can update Firefox to a newer version without a UAC prompt.{{cite web |url=https://support.mozilla.org/en-US/kb/what-mozilla-maintenance-service |title=What is the Mozilla Maintenance Service? |publisher=Mozilla Foundation |access-date=October 4, 2012}} It also added line numbers in the "Page Source" and centered find in page results. There were 89 improvements to Web Console, Scratchpad, Style Editor, Page Inspector, Style Inspector, HTML view and Page Inspector 3D view (Tilt).{{cite web |url=https://hacks.mozilla.org/2012/02/aurora-12-is-out-improvements-and-updated-developer-tools/ |title=Aurora 12 is out – improvements and updated Developer Tools |website=mozilla.org |access-date=May 10, 2012 |date=February 3, 2012}} Many bugs were fixed, as well as many other minor under-the-hood changes.{{cite web |url=https://wiki.mozilla.org/Releases/Firefox_12/Test_Plan |title=Mozilla Firefox 12 test plan |publisher=Mozilla |access-date=March 13, 2012}}{{cite web |title=Firefox 12 Release Notes |publisher=Mozilla |url=https://www.mozilla.org/en-US/firefox/12.0/releasenotes |access-date=March 13, 2012}} Firefox 12 is the final release to support Windows 2000 and Windows XP RTM & SP1.{{cite web |title=Firefox 3.6 official support to end Tuesday |website=Neowin |url=https://www.neowin.net/news/firefox-36-official-support-to-end-tuesday/ |access-date=April 22, 2012}}{{cite news |title=End of Firefox Support for Windows 2000 |website=MozillaZine Weblogs |date=January 27, 2012 |url=http://weblogs.mozillazine.org/asa/archives/2012/01/end_of_firefox_win2k.html |access-date=January 27, 2012 |archive-date=September 4, 2014 |archive-url=https://web.archive.org/web/20140904181621/http://weblogs.mozillazine.org/asa/archives/2012/01/end_of_firefox_win2k.html |url-status=dead }}

Firefox 13 was released on June 5, 2012.{{cite web |url=https://www.mozilla.org/en-US/firefox/13.0/releasenotes/ |title=Mozilla Firefox 13 Release Notes |website=mozilla.org |date=2012-06-05 |access-date=2012-06-06}} Starting with this version, Windows support was exclusively for Windows XP SP2/SP3, Windows Vista, and Windows 7. Firefox 13 adds and updates several features, such as an updated new tab{{cite web |url=https://wiki.mozilla.org/Firefox/Features/New_Tab_Page |title=New Tab Page |publisher=Mozilla |access-date=March 13, 2012}} and home tab page.{{cite web |url=https://wiki.mozilla.org/Features/Desktop/Firefox_Home_Tab |title=Home Tab |publisher=Mozilla |access-date=March 13, 2012}} The updated new tab page is a feature similar to the Speed Dial already present in Opera, Google Chrome, Apple Safari, and Internet Explorer. The new tab page will display nine of the user's most visited websites, along with a cached image. In addition to the updated new tab and home tab page, Mozilla has added a user profile cleaner/reset, reduced hang times, and implemented tabs on demand.{{cite web |url=https://wiki.mozilla.org/index.php?title=Releases/Firefox_13/Test_Plan |title=Test Plan Firefox 13 |publisher=Mozilla |access-date=March 13, 2012}} The user profile cleaner/reset provides a way for users to fix Firefox errors and glitches that may occur.{{cite web |url=https://wiki.mozilla.org/Support/Firefox_Features/Clean_up_user_profile |title=User profile reset/cleaner |publisher=Mozilla |access-date=March 13, 2012}} Mozilla's tabs on demand restores tabs that were open in the previous session, but will keep the tabs unloaded until the user requests to view the page.{{cite web |url=https://wiki.mozilla.org/Tab_on_demand |title=Tabs on Demand |publisher=Mozilla |access-date=March 13, 2012}}

Firefox 14 was released on June 26, 2012, for mobile devices only, just outside the regular release schedule of the web browser.{{cite web |url=https://www.ghacks.net/2012/07/17/firefox-14-0-1-available-why-there-wont-be-a-firefox-14-0-release/ |title=Firefox 14.0.1 available, Why there won't be a Firefox 14.0 release |last=Brinkmann |first=Martin |website=ghacks |date=July 17, 2012 |access-date=July 17, 2012}} In order to sync the version numbers of the desktop and mobile versions of Firefox, Mozilla decided to release version 14.0.1 for both mobile and desktop on July 17, 2012, instead of Firefox 14 version 14.0 for the desktop and version 14.0.1 for mobile devices.

Firefox 14 introduces a new hang detector (similar to how Mozilla currently collects other data) that allows Mozilla to collect, analyze, and identify the cause of the browser freezing/hanging. Mozilla uses this information to improve the responsiveness of Firefox for future releases.{{cite web |url=https://wiki.mozilla.org/Hang_Detector_and_Reporter: |title=Hang detector and reporter |publisher=Mozilla |access-date=March 13, 2012}} In addition to tackling freezing and not-responding errors that occur because of Firefox, Mozilla implemented opt-in activation for plugins such as Flash and Java. Mozilla wants to reduce potential problems that could arise through the unwanted use of third-party applications (malware, freezing, etc.).{{cite web |url=https://wiki.mozilla.org/Opt-in_activation_for_plugins |title=Opt-in activation for plugins |publisher=Mozilla |access-date=March 15, 2012}}

Firefox 15 was released on August 28, 2012, with a "Responsive Design View" developer tool,{{cite web |url=https://hacks.mozilla.org/2012/07/debugger-responsive-design-view-and-more-in-firefox-aurora-15/ |title=Debugger, Responsive Design View and more in Firefox Aurora 15 |publisher=Mozilla |access-date=July 20, 2012}} adds support for the Opus audio format, and adds preliminary native PDF support (disabled by default).{{cite web |title=Firefox Notes – Desktop: Firefox 15.0 release notes |website=mozilla.org |date=August 28, 2012 |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/15.0/releasenotes/ |access-date=October 1, 2012}}

Firefox 15 introduced silent updates, an automatic update that will update Firefox to the latest version without notifying the user,{{cite web |title=Silent Updater |website=Mozilla Wiki |publisher=Mozilla |url=https://wiki.mozilla.org/Silent_Update_updater |access-date=March 13, 2012}} a feature that the web browsers Google Chrome and Internet Explorer 8 and above have already implemented,{{cite web |last=Duebendorfer1 |first=Thomas |last2=Frei |first2=Stefan |title=Why Silent Updates Boost Security |website=techzoom.net |date=April 2009 |url=https://techzoom.net/static/papers/why_silent_updates_boost_security_2009.pdf |url-status=live |archive-url=https://web.archive.org/web/20120501122450/http://www.techzoom.net/publications/silent-updates/ |archive-date=May 1, 2012}}{{cite news |last=Bright |first=Peter |title=State of the Browser: Chrome closes on Firefox, IE6 dying out |website=Ars Technica |date=2012-01-04 |url=https://arstechnica.com/business/news/2012/01/state-of-the-browser-chrome-closes-on-firefox-ie6-dying-out.ars |access-date=2013-11-19}} although the user was able to disable that function.{{cite web |last=Keizer |first=Gregg |title=Mozilla aims to add silent updating to Firefox 10 |website=Computerworld |url=http://www.computerworld.com/s/article/print/9220513/Mozilla_aims_to_add_silent_updating_to_Firefox_10 |access-date=March 17, 2012 |url-status=dead |archive-url=https://archive.today/20130102175309/http://www.computerworld.com/s/article/print/9220513/Mozilla_aims_to_add_silent_updating_to_Firefox_10 |archive-date=January 2, 2013}} The startup time in Firefox 15 was improved for Windows users.{{cite web |url=https://wiki.mozilla.org/Start-up_Performance_Improvements |title=Start-up Performance Improvements |publisher=Mozilla |access-date=April 26, 2012}}

Firefox 16 was released on October 9, 2012, fixing outstanding bugs of the new features in Mac OS X Lion. There were improvements made to startup speed when a user wants to restore a previous session.{{cite web |title=Speedy Session Restore |website=Mozilla Wiki |publisher=Mozilla |url=https://wiki.mozilla.org/Speedy_Session_Restore |access-date=April 21, 2012}} Support for viewing PDF files inline was added in placement of a plugin. Support for web apps was added. Opus audio format is now enabled by default.{{cite web |title=Firefox Notes – Desktop: Firefox 16.0 release notes |website=mozilla.org |date=October 9, 2012 |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-us/firefox/16.0/releasenotes/ |access-date=March 21, 2013}}

The roll-out of Firefox 16 revision 16.0.0 was stopped on October 10, 2012, after Mozilla detected a security flaw and recommended downgrading to 15.0.1 until the issue could be fixed.{{cite web |title=Security Vulnerability in Firefox 16 |website=Mozilla Blog |publisher=Mozilla |date=2012-10-10 |url=https://blog.mozilla.org/security/2012/10/10/security-vulnerability-in-firefox-16/ |access-date=October 10, 2012}} The security flaw was fixed in version 16.0.1, which was released the following day, October 11, 2012.{{cite web |title=Firefox Notes – Desktop: Firefox 16.0.1 release notes |website=mozilla.org |date=October 11, 2012 |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/16.0.1/releasenotes/ |access-date=June 20, 2013}}

class="wikitable mw-collapsible mw-collapsed" style="width:100%; font-size:88%;"

! colspan="3"| Release history of Firefox 10–16

Version

! Release date

! Release type and highlights

10.0

| January 31, 2012

| Official Firefox 10.0 release.

  • Most add-ons are now compatible with new versions of Firefox by default.
  • Anti-Aliasing for WebGL is now implemented.
  • CSS3 3D-Transforms are now supported.
  • New {{tag|bdi}} element for bi-directional text isolation, along with supporting CSS properties.
  • Full Screen APIs allow you to build a web application that runs full screen.
10.0.1

| February 10, 2012

| Off-cycle security and stability update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/10.0.1/releasenotes/ |title=Mozilla Firefox 10.0.1 Release Notes |publisher=Mozilla |date=2012-02-10 |access-date=2012-02-10}}

10.0esr

| January 31, 2012

| Official Firefox 17.0 Extended Support Release (ESR).

First Extended Support Release (ESR).

Same changelogs of 10.0

10.0.1esr

| February 10, 2012

| Off-cycle security and stability update.

Same changelogs of 10.0.1

10.0.2

| February 16, 2012

| Off-cycle security and stability update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/10.0.2/releasenotes/ |title=Mozilla Firefox 10.0.2 Release Notes |publisher=Mozilla |date=2012-02-16 |access-date=2012-02-16}}

  • Fixed Java applets that sometimes caused text input to become unresponsive.

[https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 10.0.x product line] on March 13, 2012.

10.0.2esr

| February 16, 2012

| Off-cycle security and stability update.

Same changelogs of 10.0.2

10.0.3esr

| March 13, 2012

| Regular security and stability update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/10.0.3/releasenotes/ |title=Mozilla Firefox 10.0.3 Release Notes |publisher=Mozilla |date=2012-03-13 |access-date=2012-03-17}}

  • Security fixes{{cite web |url=https://www.mozilla.org/security/known-vulnerabilities/firefoxESR.html |title=Security Advisories for Firefox |publisher=Mozilla |date=March 13, 2012 |access-date=April 22, 2012}}
  • Fixed web workers running out of memory, affecting some add-ons used by organizations.
10.0.4esr

| April 24, 2012

| Regular security and stability update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/10.0.4/releasenotes/ |title=Mozilla Firefox 10.0.4 Release Notes |publisher=Mozilla |date=2012-04-24 |access-date=2012-04-24}}

  • Fixed an issue in Firefox ESR 10.0.3 that caused the "Whats New" page to open after an update.
  • Fixed extensions.checkCompatibility.* prefs not working in ESR releases.
10.0.5esr

| June 5, 2012

| Regular security and stability update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/10.0.5/releasenotes/ |title=Mozilla Firefox 10.0.5 Release Notes |publisher=Mozilla |date=2012-06-05 |access-date=2012-05-06}}

  • Fixed the 10.0.5 Firefox top crash with signature [@ GLEngine@0x620cf ].
10.0.6esr

| July 17, 2012

| Regular security and stability update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/10.0.6/releasenotes/ |title=Mozilla Firefox 10.0.6 Release Notes |publisher=Mozilla |date=2012-07-17 |access-date=2012-07-17}}

  • Fixed some text editing inconsistencies.
10.0.7esr

| August 28, 2012

| Regular security and stability update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/10.0.7/releasenotes/ |title=Mozilla Firefox 10.0.7 Release Notes |publisher=Mozilla |date=2012-08-28 |access-date=2012-07-17}}

  • Fixed contenteditable breaks in 10.0.7 that middle-click to open links.
  • Addressed a fix that allows specifying wildcard that matches all simple netbiosnames in network.automatic-ntlm-auth.trusted-uris.
10.0.8esr

| October 9, 2012

| Regular security and stability update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/10.0.8/releasenotes/ |title=Mozilla Firefox 10.0.8 Release Notes |publisher=Mozilla |date=2012-10-09 |access-date=2012-10-10}}

10.0.9esr

| October 12, 2012

| Off-cycle security update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/10.0.9/releasenotes/ |title=Mozilla Firefox 10.0.9 Release Notes |publisher=Mozilla |date=2012-10-12 |access-date=2012-10-15}}

10.0.10esr

| October 26, 2012

| Off-cycle security update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/10.0.10/releasenotes/ |title=Mozilla Firefox 10.0.10 Release Notes |publisher=Mozilla |access-date=October 26, 2012}}

10.0.11esr

| November 20, 2012

| Off-cycle security update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/10.0.11/releasenotes/ |title=Mozilla Firefox 10.0.11 Release Notes |publisher=Mozilla |access-date=November 20, 2012}}

10.0.12esr

| January 8, 2013

| Regular security update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/10.0.12/releasenotes/ |title=Mozilla Firefox 10.0.12 Release Notes |publisher=Mozilla |date=January 8, 2013 |access-date=January 8, 2013}} [https://wiki.mozilla.org/Enterprise/Firefox/ExtendedSupport:Proposal#Proposal End-of-life 10.0.x ESR product line] on February 19, 2013.

11.0

| March 13, 2012

| Official Firefox 11.0 release.

  • Migration of settings from Google Chrome.
  • SPDY protocol support (disabled by default).
  • RFC 6455 WebSocket protocol support with an unprefixed API.
  • Page Inspector Tilt (3D View).
  • Sync Add-ons.
  • Redesigned HTML5 video controls.
  • Style Editor (CSS).

[https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 11.0.x product line] on April 24, 2012.

12.0

| April 24, 2012

| Official Firefox 12.0 release.

  • Windows: Firefox is now easier to update with one less prompt (User Account Control).
  • Last release for Windows 2000.{{cite web |url=https://blog.mozilla.org/futurereleases/2012/03/23/upcoming-firefox-support-changes |title=Upcoming Firefox Support Changes |first=Alex |last=Keybl |website=Mozilla Blog}}
  • Reintroduced on-demand loading of pinned tabs after restoring a session.
  • Page Source now has line numbers.
  • Line breaks are now supported in the title attribute.
  • Improvements to "Find in Page" to center search result.
  • URLs pasted into the download manager window are now automatically downloaded.
  • Support for the text-align-last CSS property has been added.
  • Experimental support for ECMAScript 6 Map and Set objects has been implemented.
  • Some TinyMCE-based editors failed to load.
  • OS X: WebGL performance may be degraded on some hardware.

[https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 12.0.x product line] on June 5, 2012.

13.0

| June 5, 2012

| Official Firefox 13.0 release.

  • When opening a new tab, users are now presented with their most visited pages.
  • The default home page now has quicker access to bookmarks, history, settings, and more.
  • SPDY protocol now enabled by default for faster browsing on supported sites.
  • Restored background tabs are not loaded by default for faster startup.
  • Smooth scrolling is now enabled by default.
  • 72 total improvements to Page Inspector, HTML panel, Style Inspector, Scratchpad and Style Editor.
  • The column-fill CSS property has been implemented.
  • Experimental support for ECMAScript 6 Map and Set objects has been implemented.
  • Support for the CSS3 background-position property extended syntax has been added.
  • The :invalid pseudo-class can now be applied to the element.
  • The CSS turn angle unit is now supported.
13.0.1

| June 15, 2012

| Off-cycle security and stability update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/13.0.1/releasenotes/ |title=Mozilla Firefox 13.0.1 Release Notes |publisher=Mozilla |date=2012-06-15 |access-date=2012-06-16}}

  • Fixed an issue when Windows Messenger did not load in Hotmail, and the Hotmail inbox did not auto-update.
  • Fixed the Hebrew text that was sometimes rendered incorrectly.
  • Fixed an issue in Adobe Flash 11.3 that sometimes caused a crash on quit.

[https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 13.0.x product line] on July 17, 2012.

14.0

| June 26, 2012

| Android

Official Firefox Mobile 14.0 release.

  • Google searches now utilize HTTPS.
  • Full screen support for Mac OS X Lion implemented.
  • Plugins can now be configured to only load on click (about:config).
  • The Awesome Bar now auto-completes typed URLs, a new feature that will suggest a website that user frequently visits for a faster browsing.{{cite web |url=https://wiki.mozilla.org/Firefox/Features/URL_Autocomplete |title=Inline URL autocomplete |publisher=Mozilla |access-date=March 13, 2012}}
  • Improved site identity manager, to prevent spoofing of an SSL connection with favicons.
  • Pointer Lock API implemented.
  • New API to prevent your display from sleeping.
  • New text-transform and font-variant CSS improvements for Turkic languages and Greek.
  • Long URLs now extend the status bar almost to the whole width of the viewport.
  • Optional Gstreamer backend for HTML5 video to allow H.264 playback.{{cite web |url=https://bugzilla.mozilla.org/show_bug.cgi?id=422540 |title=422540 – GStreamer backend for HTML5 video element |website=bugzilla.mozilla.org |access-date=March 21, 2013}} This allows playback of H.264 if the codec is installed as a GStreamer plugin. GStreamer support is not enabled in the official builds, but can be enabled at compile time.
14.0.1

| July 17, 2012

| Desktop

Official Firefox Desktop 14.0 release.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/14.0.1/releasenotes/ |title=Mozilla Firefox 14.0.1 Release Notes |publisher=Mozilla |date=2012-07-17 |access-date=2012-07-17}}

  • Fixed the GIF animation that can get stuck when src and image size are changed.
  • Mac OS X: Fixed the nsCocoaWindow::ConstrainPosition that uses wrong screen in multi-display setup.
  • Fixed the CSS :hover regression when an element's class name is set by JavaScript.

[https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 14.0.x product line] on August 28, 2012.

15.0

| August 28, 2012

| Official Firefox 15.0 release.

  • Silent update: Background updates.
  • Support for SPDY networking protocol v3.
  • WebGL enhancements, including compressed textures for better performance.
  • Localization in Maithili.
  • Optimized memory usage for add-ons.
  • JavaScript debugger integrated into developer tools.
  • New layout view added to Inspector.
  • High precision event timer implemented.
  • The CSS word-break property has been implemented.
  • New responsive design tool allows web developers to switch between desktop and mobile views of sites.
  • Native support for the Opus audio format added.
  • The
  • The source element now supports the media attribute.
  • Fixed the focus rings that keep growing when repeatedly tabbing through elements.
15.0.1

| September 6, 2012

| Off-cycle stability update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/15.0.1/releasenotes/ |title=Mozilla Firefox 15.0.1 Release Notes |publisher=Mozilla |date=2012-09-06 |access-date=2012-09-10}}

  • Addressed a fix where sites visited while in Private Browsing mode could be found through manual browser cache inspection.

[https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 15.0.x product line] on October 9, 2012.

16.0

| October 9, 2012

| Official Firefox 16.0 release.

  • Firefox on Mac OS X now has preliminary VoiceOver support turned on by default.
  • Initial web app support (Windows/Mac/Linux).
  • Acholi and Kazakh localizations added.
  • Improvements around JavaScript responsiveness through incremental garbage collection.
  • New Developer Toolbar with buttons for quick access to tools, error count for the Web Console, and a new command line for quick keyboard access.
  • CSS3 Animations, Transitions, Transforms and Gradients unprefixed.
  • Recently opened files list in Scratchpad implemented.
  • Fixed an issue where debugger breakpoints do not catch on page reload.
  • No longer supporting MD5 as a hash algorithm in digital signatures.
  • Opus support by default.
  • Reverse animation direction has been implemented.
  • Per tab reporting in about:memory.
  • User Agent strings for pre-release Firefox versions now show only major version.
16.0.1

| October 11, 2012

| Off-cycle security and stability update.

16.0.2

| October 26, 2012

| Off-cycle security and stability update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/16.0.2/releasenotes/ |title=Mozilla Firefox 16.0.2 Release Notes |publisher=Mozilla |access-date=October 26, 2012}}

Final release to support Mac OS X Leopard{{cite web |last=Keizer |first=Greg |title=Mozilla sets end of Firefox support for OS X Leopard |website=MacWorld |date=August 22, 2012 |url=https://www.macworld.com/article/218915/mozilla_sets_end_of_firefox_for_os_x_leopard.html |access-date=May 3, 2019 |archive-date=May 16, 2021 |archive-url=https://web.archive.org/web/20210516004253/https://www.macworld.com/article/218915/mozilla_sets_end_of_firefox_for_os_x_leopard.html |url-status=dead }}

[https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 16.0.x product line] on November 20, 2012.

= Firefox 17 through 23 =

{{pic|Mozilla Firefox logo 2013.svg|Logo used from Firefox 23 to Firefox 56|150px}}

Firefox 17 and Firefox ESR 17 were released on November 20, 2012.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/17.0/releasenotes/ |title=Mozilla Firefox 17.0 Release notes |publisher=Mozilla |date=November 20, 2012 |access-date=November 20, 2012}} It was not planned to bring as many user-facing features as previous releases, it brings improved display of location bar results,{{cite web |title=Improved display of location bar results |url=https://wiki.mozilla.org/Improve_display_of_location_bar_results |website=Mozilla Wiki |publisher=Mozilla |access-date=July 31, 2012}} improvements to the silent update mechanism for users with incompatible add-ons,{{cite web |title=Silent update: improvements for users with incompatible add-ons |url=https://wiki.mozilla.org/Silent_Update_not_now_prompt |website=Mozilla Wiki |publisher=Mozilla |access-date=July 31, 2012}} and refinements to the Click-To-Play system introduced in Firefox 14.{{cite web |title=Click-to-Play Part II |url=https://wiki.mozilla.org/Click-to-play_part_II |website=Mozilla Wiki |publisher=Mozilla |access-date=October 21, 2012}} A new feature for developers, an HTML tree editor{{cite web |title=HTML tree editor |url=https://wiki.mozilla.org/DevTools/Features/HTMLTreeEditor |website=Mozilla Wiki |publisher=Mozilla |access-date=2012-09-07}} is also included. Firefox 17 is the first version of the browser that uses SpiderMonkey 17.{{cite web |url=https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/17 |title=SpiderMonkey 17 - Mozilla {{pipe}} MDN |website=developer.mozilla.org |date=2014-05-02 |access-date=2014-07-25 |archive-date=November 10, 2014 |archive-url=https://web.archive.org/web/20141110194024/https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/17 |url-status=dead }}

Starting with Firefox 17, Mac OS X support is exclusively for Snow Leopard, Lion, and Mountain Lion.

Firefox 18 was released on January 8, 2013.{{cite web |url=https://wiki.mozilla.org/RapidRelease/Calendar |title=Firefox Rapid Release Calendar |website=Mozilla Wiki}} A new feature for Firefox 18 is IonMonkey, Mozilla's next generation JavaScript engine,{{cite web |first=David|last=Anderson |title=IonMonkey in Firefox 18 |website=Mozilla Blog |publisher=Mozilla |date=2012-09-12 |url=https://blog.mozilla.org/javascript/2012/09/12/ionmonkey-in-firefox-18/ |access-date=2012-10-12}} it also uses some functions of WebRTC.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/18.0/releasenotes/ |title=Mozilla Firefox 18.0 Release Notes |publisher=Mozilla |date=January 8, 2013 |access-date=January 8, 2013}}

Firefox 19 was released on February 19, 2013, featuring a built-in PDF viewer.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/19.0/releasenotes/ |title=Mozilla Firefox 19.0 Release Notes |publisher=Mozilla |date=February 19, 2013 |access-date=February 19, 2013}}

Firefox 20 was released on April 2, 2013, introduced a panel-based download manager,{{cite web |title=Panel-based download manager |url=https://wiki.mozilla.org/User:P.A./Panel-based_Download_Manager |website=Mozilla Wiki |publisher=Mozilla |access-date=August 28, 2012}}{{cite web |url=https://www.mozilla.org/en-US/firefox/20.0/releasenotes/ |title=Firefox Notes – Desktop |website=mozilla.org |date=April 2, 2013 |access-date=April 2, 2013}} along with H.264 decoding on the tag (on Windows only), and per-window private browsing (per-tab private browsing on Android). It also includes a new developer toolbox, that combines all developer tools into one panel.

Firefox 21 was released on May 14, 2013. The Social API now supports multiple providers, and an enhanced three-state UI for Do Not Track (DNT).{{cite web |url=https://www.mozilla.org/en-US/firefox/21.0/releasenotes/ |title=Mozilla Firefox 21.0 Release Notes |website=mozilla.org |date=May 14, 2013 |access-date=May 14, 2013}}

Firefox 22 was released on June 25, 2013. WebRTC is now enabled by default.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/22.0/releasenotes/ |title=Firefox Beta Notes – Desktop |website=mozilla.org |date=May 16, 2013 |access-date=June 20, 2013}}

Partial CSS Flexbox support was added (flex-wrap support was scheduled for Firefox 28{{cite web |url=https://bugzilla.mozilla.org/show_bug.cgi?id=702508#c61 |title=702508 – Support parsing/computing multi-line flexbox properties "flex-wrap", "align-content" |website=bugzilla.mozilla.org |access-date=2014-02-27}}). A new feature for Firefox 22 was OdinMonkey, Mozilla's next generation JavaScript engine.

Firefox 23 was released on August 6, 2013. It includes an updated Firefox logo, mixed content blocking enabled by default to defend against man-in-the-middle attacks, implementation of the form control attribute in HTML5, dropping support for the HTML element as well as the text-decoration:blink CSS element, the restriction to have to "switch to a different search provider across the entire browser", and a global browser console, a new network monitor among other things. JavaScript is automatically enabled by the update, without regard to the previous setting, and the ability to turn it off has been removed from the interface;{{cite web |url=https://www.mozilla.org/en-US/firefox/23.0/releasenotes/ |title=Firefox 23.0 Release Notes |website=mozilla.org |access-date=August 24, 2013}} the "contentious" change was made because many websites depend on JavaScript and it was felt that users unaware that they had disabled JavaScript were attributing the resulting unpredictable layout to software bugs in Firefox.{{cite news |title=Firefox 23 finally kills the blink tag, removes ability to turn off JavaScript, introduces new logo |first=Sebastian |last=Anthony |date=August 7, 2013 |website=ExtremeTech |url=http://www.extremetech.com/computing/163291-firefox-23-finally-kills-the-blink-tag-removes-ability-to-turn-off-javascript-introduces-new-logo |access-date=August 24, 2013 |quote=This contentious change derives from the fact that disabling JavaScript breaks many websites – and some people might turn off JavaScript without actually knowing what it does, resulting in unpredictable and frustrating behavior that the user might blame on Firefox. JavaScript can still be disabled via about:config or with add-ons (such as NoScript).}}

class="wikitable mw-collapsible mw-collapsed" style="width:100%; font-size:88%;"

! colspan="3"| Release history of Firefox 17–23

Version

! Release date

! Release type and highlights

17.0

| November 20, 2012

| Official Firefox 17.0 release.

  • First revision of the Social API and support for Facebook Messenger.
  • Click-to-play blocklisting implemented to prevent vulnerable plugin versions from running without the user's permission.
  • Updated Awesome Bar experience with larger icons.
  • Mac OS X 10.5 is no longer supported.
  • JavaScript Maps and Sets are now iterable.
  • SVG FillPaint and StrokePaint implemented.
  • Improvements that make the Web Console, Debugger and Developer Toolbar faster and easier to use.
  • New Markup panel in the Page Inspector allows easy editing of the DOM.
  • Sandbox attribute for iframes implemented, enabling increased security.
  • Over twenty performance improvements, including fixes around the New Tab page.
  • Fixed pointer lock that doesn't work in web apps.
  • Fixed page scrolling on sites with fixed headers.
17.0esr

| November 20, 2012

| Official Firefox 17.0 Extended Support Release (ESR).

17.0.1

| November 30, 2012

| Off-cycle stability update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/17.0.1/releasenotes/ |title=Mozilla Firefox 17.0.1 Release notes |publisher=Mozilla |access-date=December 2, 2012}}

  • Reverted user agent change causing some website incompatibilities.
  • Fixed font rendering issue.

[https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 17.0.x product line] on January 8, 2013.

17.0.1esr

| November 30, 2012

| Off-cycle stability update.

17.0.2esr

| January 8, 2013

| Regular security and stability updates.

  • Fixed improvements to the Click-to-Play vulnerable plugin blocklisting feature.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/17.0.2/releasenotes/ |title=Mozilla Firefox 17.0.2 Release Notes |publisher=Mozilla |date=January 8, 2013 |access-date=January 8, 2013}}
17.0.3esr

| February 19, 2013

| Regular security update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/17.0.3/releasenotes/ |title=Mozilla Firefox 17.0.3 Release Notes |publisher=Mozilla |date=February 19, 2013 |access-date=February 19, 2013}}

17.0.4esr

| March 7, 2013

| Regular security update.{{cite web |url=https://www.mozilla.org/en-US/firefox/17.0.4/releasenotes/ |title=Mozilla Firefox 17.0.4 Release Notes |publisher=Mozilla |date=March 7, 2013 |access-date=March 11, 2013}}

17.0.5esr

| April 2, 2013

| Regular security update.{{cite web |url=https://www.mozilla.org/en-US/firefox/17.0.5/releasenotes/ |title=Mozilla Firefox 17.0.5 Release Notes |publisher=Mozilla |date=April 2, 2013 |access-date=April 3, 2013}}

17.0.6esr

| May 10, 2013

| Regular security update.{{cite web |url=https://www.mozilla.org/en-US/firefox/17.0.6/releasenotes/ |title=Mozilla Firefox 17.0.6 Release Notes |publisher=Mozilla |date=May 10, 2013 |access-date=May 14, 2013}}

17.0.7esr

| June 25, 2013

| Regular security update.{{cite web |url=https://www.mozilla.org/en-US/firefox/17.0.7/releasenotes/ |title=Mozilla Firefox 17.0.7 Release Notes |publisher=Mozilla |date=June 25, 2013 |access-date=June 26, 2013}}

17.0.8esr

| August 6, 2013

| Regular security update.{{cite web |url=https://www.mozilla.org/en-US/firefox/17.0.8/releasenotes/ |title=Mozilla Firefox 17.0.8 Release Notes |publisher=Mozilla |date=August 6, 2013 |access-date=August 5, 2013}}

17.0.9esr

| September 17, 2013

| Regular security update.{{cite web |url=https://www.mozilla.org/en-US/firefox/17.0.9/releasenotes/ |title=Mozilla Firefox 17.0.9 Release Notes |publisher=Mozilla |date=September 17, 2013 |access-date=September 17, 2013}}

17.0.10esr

| October 29, 2013

| Regular security update.{{cite web |url=https://www.mozilla.org/en-US/firefox/17.0.10/releasenotes/ |title=Mozilla Firefox 17.0.10 Release Notes |publisher=Mozilla |date=October 29, 2013 |access-date=October 29, 2013}}

17.0.11esr

| November 15, 2013

| Off-cycle stability update.{{cite web |url=https://www.mozilla.org/en-US/firefox/17.0.10/releasenotes/ |title=Mozilla Firefox 17.0.11 Release Notes |publisher=Mozilla |date=November 15, 2013 |access-date=November 18, 2013}}

  • Updated ESR17 to NSS 3.14.5 RTM.

[https://wiki.mozilla.org/Enterprise/Firefox/ExtendedSupport:Proposal#Proposal End-of-life 17.0.x ESR product line] on December 10, 2013.

18.0

| January 8, 2013

| Official Firefox 18.0 release.

  • Faster JavaScript performance via IonMonkey compiler.
  • Support for Retina displays on OS X 10.7 and up.
  • Preliminary support for WebRTC.
  • Better image quality with Mozilla's new HTML scaling algorithm.
  • Performance improvements around tab switching.
  • Support for new DOM property window.devicePixelRatio.
  • Improvement in startup time through smart handling of signed extension certificates.
  • Support for W3C touch events implemented, taking the place of MozTouch events.
  • Disable insecure content loading on HTTPS pages.
  • Improved responsiveness for users on proxies.

Changes during Aurora releases

  • Adds a Metro user interface on Windows 8.
18.0.1

| January 18, 2013

| Off-cycle stability update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/18.0.1/releasenotes/ |title=Mozilla Firefox 18.0.1 Release Notes |publisher=Mozilla |date=January 18, 2013 |access-date=January 19, 2013}}

  • Fixed problems involving HTTP Proxy Transactions.
  • Fixed unity player crashes on Mac OS X.
  • Disabled HIDPI support on external monitors to avoid rendering glitches.
18.0.2

| February 5, 2013

| Off-cycle stability update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/18.0.2/releasenotes/ |title=Mozilla Firefox 18.0.2 Release Notes |publisher=Mozilla |date=January 5, 2013 |access-date=January 6, 2013}} [https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 18.0.x product line] on February 19, 2013.

19.0

| February 19, 2013

| Official Firefox 19.0 release.

  • Built-in PDF Viewer.
  • Canvas elements can export their content as an image blob using canvas.toBlob().
  • Startup performance improvements.
  • Debugger now supports pausing on exceptions and hiding non-enumerable properties.
  • Remote Web Console is available for connecting to Firefox on Android or Firefox OS (experimental, set devtools.debugger.remote-enabled to true).
  • There is now a Browser Debugger available for add-on and browser developers (experimental, set devtools.chrome.enabled to true).
  • Web Console CSS links now open in the Style Editor.
  • CSS @page is now supported.
  • CSS viewport-percentage length units implemented (vh, vw, vmin and vmax).
  • CSS text-transform now supports full-width.
  • Fixed certain valid WebGL drawing operations that were incorrectly rejected, leaving incomplete rendering in affected pages.
  • Fixed an issue that starting Firefox with -private flag incorrectly claims you are not in Private Browsing mode.
  • Fixed plugins that stop rendering when the top half of the plugin is scrolled off the top of the page, in HiDPI mode.
19.0.1

| February 27, 2013

| Off-cycle stability update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/19.0.1/releasenotes/ |title=Mozilla Firefox 19.0.1 Release Notes |publisher=Mozilla |date=February 27, 2013 |access-date=February 28, 2013}}

  • Windows 8 only: Fixed stability issue for some AMD Radeon HD graphics cards.
19.0.2

| March 7, 2013

| Off-cycle security update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/19.0.2/releasenotes/ |title=Mozilla Firefox 19.0.2 Release Notes |publisher=Mozilla |date=March 7, 2013 |access-date=March 8, 2013}}

  • Released to address a security vulnerability in the HTML editor.
  • Last release for Android 2.1

[https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 19.0.x product line] on April 2, 2013.

20.0

| April 2, 2013

| Official Firefox 20.0 release.

  • Per-window Private Browsing.
  • New download experience.
  • Ability to close hanging plugins, without the browser hanging.
  • Continued performance improvements around common browser tasks (page loads, downloads, shutdown, etc.).
  • Continued implementation of draft ECMAScript 6 – clear() and Math.imul.
  • New JavaScript Profiler tool.
  • getUserMedia implemented for web access to the user's camera and microphone (with user permission).
  • now supports blend modes.
  • Various and improvements.
  • Fixed: Details button on Crash Reporter.
  • Fixed: Unity plugin that doesn't display in HiDPI mode.
20.0.1

| April 11, 2013

| Off-cycle security update.{{cite web |url=https://website-archive.mozilla.org/www.mozilla.org/firefox_releasenotes/en-US/firefox/20.0.1/releasenotes/ |title=Mozilla Firefox 20.0.1 Release Notes |publisher=Mozilla |date=April 11, 2013 |access-date=April 12, 2013}}

  • Windows-only update to handle issues around handling UNC paths.

[https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 20.0.x product line] on May 14, 2013.

21.0

| May 14, 2013

| Official Firefox 21.0 release.

  • The Social API now supports multiple providers.
  • Enhanced three-state UI for Do Not Track (DNT).
  • Preliminary implementation of Firefox Health Report.
  • Firefox will suggest how to improve your application startup time if needed.
  • Ability to Restore removed thumbnails on New tab Page.
  • CSS -moz-user-select:none selection changed to improve compatibility with -webkit-user-select:none.
  • Graphics related performance improvements.
  • Removed E4X support from SpiderMonkey.
  • Implemented Remote Profiling.
  • Integrated, Add-on SDK loader and API libraries into Firefox.
  • Added support for
    element.
  • Implemented scoped stylesheets.
  • Fixed: Some function keys may not work when pressed.
  • Fixed: Browsing and Download history clearing needs unification to avoid confusion on clearing download history.

[https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 21.0.x product line] on June 25, 2013.

22.0

| June 25, 2013

| Official Firefox 22.0 release.

  • WebRTC is now enabled by default.
  • Windows: Firefox now follows display scaling options to render text larger on high-res displays.
  • Mac OS X: Download progress in Dock application icon.
  • HTML5 audio/video playback rate can now be changed.
  • Social services management implemented in Add-ons Manager.
  • asm.js optimizations (OdinMonkey) enabled for major performance improvements.
  • Improved WebGL rendering performance through asynchronous canvas updates.
  • Plain text files displayed within Firefox will now word-wrap.
  • For user security, the |Components| object is no longer accessible from web content.
  • Improved memory usage and display time when rendering images.
  • Pointer Lock API can now be used outside of fullscreen.
  • CSS3 Flexbox implemented and enabled by default.
  • New Web Notifications API implemented.
  • Added clipboardData API for JavaScript access to a user's clipboard.
  • New built-in font inspector.
  • New HTML5 and elements
  • Fixed: Scrolling using some high-resolution-scroll aware touchpads feels slow.

[https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 22.0.x product line] on August 6, 2013.

23.0

| August 6, 2013

| Official Firefox 23.0 release.

In this Version Mozilla changed the Firefox Logo.

  • Mixed content blocking enabled to protects users from man-in-the-middle attacks and eavesdroppers on HTTPS pages.
  • Options panel created for Web Developer Toolbox.
  • "Enable JavaScript" preference checkbox has been removed and user-set values will be reset to the default.
  • Improved about:memory's functional UI.
  • Simplified interface for notifications of plugin installation.
  • Enabled DXVA2 on Windows Vista+ to accelerate H.264 video decoding.
  • Users can now switch to a new search provider across the entire browser.
  • CSP policies using the standard syntax and semantics will now be enforced.
  • rendering improvements.
  • Replaced fixed-ratio audio resampler in webrtc.org capture code with Speex resampler and eliminated pseudo-44,000 Hz rate.
  • "Load images automatically" and "Always show the tab bar" checkboxes removed from preferences and reset to defaults.
  • HTML5 form control implemented.
  • Write more accessible pages on touch interfaces with new ARIA role for key buttons.
  • Social share functionality.
  • Added unprefixed requestAnimationFrame.
  • Implemented a global browser console.
  • Dropped blink effect from text-decoration: blink; and completely removed element.
  • New feature in toolbox: Network Monitor.
23.0.1

| August 16, 2013

| Off-cycle stability update.{{cite web |url=https://www.mozilla.org/en-US/firefox/23.0.1/releasenotes/ |title=Mozilla Firefox 23.0.1 Release Notes |publisher=Mozilla |date=August 16, 2013 |access-date=August 17, 2013}}

[https://wiki.mozilla.org/RapidRelease#4.0.x_and_Previous_Releases_.5Bjoduinn.2C_.5D End-of-life 23.0.x product line] on September 17, 2013.

= Firefox 24 through 30 =

File:Firefox 29.0 on Windows 8.png]]

Firefox 24 and Firefox 24 ESR were released on September 17, 2013. The release includes support for the new scrollbar style in Mac OS X 10.7 (and newer), closing tabs to the right, an improved browser console for debugging, and improved SVG rendering, among other things.{{cite web |series=Firefox Notes – Desktop |title=Firefox 24.0 release notes |website=mozilla.org |date=September 17, 2013 |url=https://www.mozilla.org/en-US/firefox/24.0/releasenotes/ |access-date=September 19, 2013}} It is the first version of the browser that uses SpiderMonkey 24.{{cite web |url=https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/24 |title=SpiderMonkey 24 - Mozilla {{pipe}} MDN |website=developer.mozilla.org |date=2014-05-02 |access-date=2014-07-25 |archive-date=August 8, 2014 |archive-url=https://web.archive.org/web/20140808180131/https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/24 |url-status=dead }}

Firefox 25 was released on October 29, 2013. Firefox 25 Nightly was at one point slated to include the Australis theme, but Australis did not actually land on Nightly until Firefox 28,{{cite web |last=Dolske |first=Justin |title=Australis schedule update #2 |url=https://mail.mozilla.org/pipermail/firefox-dev/2013-July/000475.html |access-date=August 16, 2013 |date=July 1, 2013}} did not make it to Firefox 28 Aurora channel, and was finally available with Firefox 29.{{cite web |title=Planning 2013-11-20 |url=https://wiki.mozilla.org/Firefox/Planning/2013-11-20#Nightly_.2829.29 |access-date=January 12, 2014}} This release added support for