Firefox Mozilla Firefox, or simply Firefox, is a free and open-source web browser developed by the Mozilla Foundation and its subsidiary, the Mozilla Corporation. It uses the Gecko rendering engine to display web pages, which implements current ...

was created by

Dave Hyatt David Hyatt (born 28 June 1972) is an American software engineer and a ''Shadowrun'' game expansion author. Employed by Apple starting in 2002, he was part of the Safari web browser and WebKit framework development team. He also helped develop ...

and Blake Ross as an experimental branch of the

Mozilla Mozilla (stylized as moz://a) is a free software community founded in 1998 by members of Netscape. The Mozilla community uses, develops, spreads and supports Mozilla products, thereby promoting exclusively free software and open standards, ...

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.

Current and future releases

Current supported official releases

:* Firefox 109.0 :* Firefox 102.7.0 ESR

Current supported test releases

:* Firefox 110.0 Developer Edition :* Firefox 110.0 Beta :* Firefox 111.0 Nightly

Future official releases

;Rapid :* 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 102.8 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

Future test releases

Early versions

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. 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. This accelerated release cycle was met with criticism by users, as it often broke add-on compatibility, as well as those who believe Firefox was simply trying to increase its version number to compare with other browsers such as

Google Chrome Google Chrome is a cross-platform web browser developed by Google. It was first released in 2008 for Microsoft Windows, built with free software components from Apple WebKit and Mozilla Firefox. Versions were later released for Linux, macOS, ...

Firefox 5 through 9

Firefox 5 was released on June 21, 2011, three months after the major release of Firefox 4. Firefox 5 is the first release in Mozilla's new rapid release plan, matching

's rapid release schedule and rapid version number increments. Firefox 5 has significantly improved the speed of web-related tasks, such as loading pages with

combo box A combo box is a commonly used graphical user interface widget (or control). Traditionally, it is a combination of a drop-down list or list box and a single-line editable textbox, allowing the user to either type a value directly or select a v ...

es or

MathML Mathematical Markup Language (MathML) is a mathematical markup language, an application of XML for describing mathematical notations and capturing both its structure and content. It aims at integrating mathematical formulae into World Wide W ...

. Mozilla also integrated the

HTML5 video The HTML5 specification introduced the video element for the purpose of playing videos, partially replacing the object element. HTML5 video is intended by its creators to become the new standard way to show video on the web, instead of the previo ...

WebM WebM is an audiovisual media file format. It is primarily intended to offer a royalty-free alternative to use in the HTML5 video and the HTML5 audio elements. It has a sister project, WebP, for images. The development of the format is sponso ...

standard into the browser, allowing playback of WebM videos. Firefox 6 was released on August 16, 2011, introducing a permissions manager, new address bar highlighting (the

domain name A domain name is a string that identifies a realm of administrative autonomy, authority or control within the Internet. Domain names are often used to identify services provided through the Internet, such as websites, email services and more. As ...

is black while the rest of the URL is gray), 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. Firefox 7 was released on September 27, 2011, and uses as much as 50% less

RAM Ram, ram, or RAM may refer to: Animals * A male sheep * Ram cichlid, a freshwater tropical fish People * Ram (given name) * Ram (surname) * Ram (director) (Ramsubramaniam), an Indian Tamil film director * RAM (musician) (born 1974), Dutch * ...

than Firefox 4 as a result of the MemShrink project to reduce Firefox memory usage. 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. Some URLs are trimmed in the address bar, so the "

http The Hypertext Transfer Protocol (HTTP) is an application layer protocol in the Internet protocol suite model for distributed, collaborative, hypermedia information systems. HTTP is the foundation of data communication for the World Wide We ...

://" scheme no longer appears, but "

https Hypertext Transfer Protocol Secure (HTTPS) is an extension of the Hypertext Transfer Protocol (HTTP). It is used for secure communication over a computer network, and is widely used on the Internet. In HTTPS, the communication protocol is enc ...

://" is still displayed. Trailing slashes on domains are also hidden, for example: https://www.example.org/ becomes https://www.example.org. Firefox 8 was released on November 8, 2011 and prompts users about any previously installed add-ons. Upon installation, a

dialog box The dialog box (also called dialogue box (non-U.S. English), message box or simply dialog) is a graphical control element in the form of a small window that communicates information to the user and prompts them for a response. Dialog boxes ar ...

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

toolbar The toolbar, also called a bar or standard toolbar (originally known as ribbon) is a graphical control element on which on-screen icons can be used. A toolbar often allows for quick access to functions that are commonly used in the program. Some ...

s. 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 OS X Lion, also known as Mac OS X Lion, (version 10.7) is the eighth major release of macOS, Apple's desktop and server operating system for Mac computers. A preview of OS X 10.7 Lion was publicly shown at the "Back to the Mac" Apple Speci ...

, added two-finger swipe navigation for Mac OS X Lion, added support for querying

Do Not Track Do Not Track (DNT) is a formerly official HTTP header field, designed to allow internet users to opt-out of tracking by websites—which includes the collection of data regarding a user's activity across multiple distinct contexts, and the retent ...

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.

Firefox 10 through 16

Firefox 10 and Firefox ESR 10 were released on January 31, 2012. Firefox 10 added a full screen API and improved WebGL performance, support for CSS 3D Transforms and for

anti-aliasing Anti-aliasing may refer to any of a number of techniques to combat the problems of aliasing in a sampled signal such as a digital image or digital audio recording. Specific topics in anti-aliasing include: * Anti-aliasing filter, a filter used be ...

in the WebGL standard for

hardware-accelerated Hardware acceleration is the use of computer hardware designed to perform specific functions more efficiently when compared to software running on a general-purpose central processing unit (CPU). Any function (mathematics), transformation of d ...

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. 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. 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. 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. Firefox 3D tilt

Firefox 11 was released on March 13, 2012. Firefox 11 introduced many new features, including migration of bookmarks and history from

SPDY SPDY (pronounced "speedy") is an obsolete open-specification communication protocol developed for transporting web content. SPDY became the basis for HTTP/2 specification. However, HTTP/2 diverged from SPDY and eventually HTTP/2 subsumed all u ...

integrated services, , Add-on Sync, redesigned

HTML5 HTML5 is a markup language used for structuring and presenting content on the World Wide Web. It is the fifth and final major HTML version that is a World Wide Web Consortium (W3C) recommendation. The current specification is known as the HTML ...

video controls, and the Style Editor (

CSS Cascading Style Sheets (CSS) is a style sheet language used for describing the presentation of a document written in a markup language such as HTML or XML (including XML dialects such as SVG, MathML or XHTML). CSS is a cornerstone technolo ...

). The update also fixed many bugs, and improved developer tools. 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. 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). Many bugs were fixed, as well as many other minor under-the-hood changes. Firefox 12 is the final release to support

Windows 2000 Windows 2000 is a major release of the Windows NT operating system developed by Microsoft and oriented towards businesses. It was the direct successor to Windows NT 4.0, and was released to manufacturing on December 15, 1999, and was offici ...

and Windows XP RTM & SP1. Firefox 13 was released on June 5, 2012. 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 and home tab page. The updated new tab page is a feature similar to the Speed Dial already present in

Opera Opera is a form of theatre in which music is a fundamental component and dramatic roles are taken by singers. Such a "work" (the literal translation of the Italian word "opera") is typically a collaboration between a composer and a libr ...

, Apple Safari, and

Internet Explorer Internet Explorer (formerly Microsoft Internet Explorer and Windows Internet Explorer, commonly abbreviated IE or MSIE) is a series of graphical web browsers developed by Microsoft which was used in the Windows line of operating systems (in ...

. 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. The user profile cleaner/reset provides a way for users to fix Firefox errors and glitches that may occur. 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. Firefox 14 was released on June 26, 2012, for mobile devices only, just outside the regular release schedule of the web browser. 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. 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 Java (; id, Jawa, ; jv, ꦗꦮ; su, ) is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea to the north. With a population of 151.6 million people, Java is the world's mo ...

. Mozilla wants to reduce potential problems that could arise through the unwanted use of third-party applications (

malware Malware (a portmanteau for ''malicious software'') is any software intentionally designed to cause disruption to a computer, server, client, or computer network, leak private information, gain unauthorized access to information or systems, depr ...

, freezing, etc.). Firefox 15 was released on August 28, 2012, with a " Responsive Design View" developer tool, adds support for the Opus audio format, and adds preliminary native

PDF Portable Document Format (PDF), standardized as ISO 32000, is a file format developed by Adobe in 1992 to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems. ...

support (disabled by default). Firefox 15 introduced silent updates, an automatic update that will update Firefox to the latest version without notifying the user, a feature that the web browsers

and

Internet Explorer 8 Windows Internet Explorer 8 (IE8) is a web browser for Windows. It was released by Microsoft on March 19, 2009, as the eighth version of Internet Explorer and the successor to Internet Explorer 7. It was the default browser in Windows 7 (later def ...

and above have already implemented, although the user was able to disable that function. The startup time in Firefox 15 was improved for Windows users. Firefox 16 was released on October 9, 2012, fixing outstanding bugs of the new features in

. There were improvements made to startup speed when a user wants to restore a previous session. Support for viewing

files inline was added in placement of a plugin. Support for web apps was added.

Opus ''Opus'' (pl. ''opera'') is a Latin word meaning "work". Italian equivalents are ''opera'' (singular) and ''opere'' (pl.). Opus or OPUS may refer to: Arts and entertainment Music * Opus number, (abbr. Op.) specifying order of (usually) publicatio ...

audio format is now enabled by default. 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. The security flaw was fixed in version 16.0.1, which was released the following day, October 11, 2012.

Firefox 17 through 23

Firefox 17 and Firefox ESR 17 were released on 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, improvements to the silent update mechanism for users with incompatible add-ons, and refinements to the Click-To-Play system introduced in Firefox 14. A new feature for developers, an HTML tree editor is also included. Firefox 17 is the first version of the browser that uses SpiderMonkey 17. Starting with Firefox 17, Mac OS X support is exclusively for

Snow Leopard The snow leopard (''Panthera uncia''), also known as the ounce, is a felid in the genus '' Panthera'' native to the mountain ranges of Central and South Asia. It is listed as Vulnerable on the IUCN Red List because the global population is es ...

, Lion, and

Mountain Lion The cougar (''Puma concolor'') is a large cat native to the Americas. Its range spans from the Canadian Yukon to the southern Andes in South America and is the most widespread of any large wild terrestrial mammal in the Western Hemisphere. ...

. Firefox 18 was released on January 8, 2013. A new feature for Firefox 18 is

IonMonkey SpiderMonkey is the first JavaScript engine, written by Brendan Eich at Netscape Communications, later released as open source and currently maintained by the Mozilla Foundation. It is used in the Firefox web browser. History Eich "wrote Jav ...

, Mozilla's next generation JavaScript engine, it also uses some functions of

WebRTC WebRTC (Web Real-Time Communication) is a free and open-source project providing web browsers and mobile applications with real-time communication (RTC) via application programming interfaces (APIs). It allows audio and video communication to wor ...

. Firefox 19 was released on February 19, 2013, featuring a built-in

viewer. Firefox 20 was released on April 2, 2013, introduced a panel-based download manager, 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). Firefox 22 was released on June 25, 2013.

is now enabled by default. Partial CSS Flexbox support was added (flex-wrap support was scheduled for Firefox 28). 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 attack In cryptography and computer security, a man-in-the-middle, monster-in-the-middle, machine-in-the-middle, monkey-in-the-middle, meddler-in-the-middle, manipulator-in-the-middle (MITM), person-in-the-middle (PITM) or adversary-in-the-middle (AiTM) ...

s, 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; 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 Layout may refer to: * Page layout, the arrangement of visual elements on a page ** Comprehensive layout (comp), a proposed page layout presented by a designer to their client * Layout (computing), the process of calculating the position of obj ...

software bug A software bug is an error, flaw or fault in the design, development, or operation of computer software that causes it to produce an incorrect or unexpected result, or to behave in unintended ways. The process of finding and correcting bugs i ...

s in Firefox.

Firefox 24 through 30

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. It is the first version of the browser that uses SpiderMonkey 24. 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, did not make it to Firefox 28 Aurora channel, and was finally available with Firefox 29. This release added support for

</code> attribute, <code>background-attachment:local</code> in CSS, along with <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Web_audio.html"  "title="Web audio">Web audio</a><span class="linkinfotext"> 


HTML5 Audio is a subject of the HTML5 specification, incorporating audio input, playback, and synthesis, as well as  speech to text, in the browser.
  &lt;audio&gt; element 
The   element represents a sound, or an audio stream. It is commonly use ...<br></span></div> API support, a separate find bar for each tab and many other bug fixes.<ref name="Firefox 25.0"></ref><ref name="What's New in Firefox 25"></ref><ref name="Here's What's New In Firefox 25"></ref>

Firefox 26 was released on December 10, 2013. Firefox 26 changed the behavior of <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Java_(programming_language).html"  "title="Java (programming language)">Java</a><span class="linkinfotext"> 




Java (;  id, Jawa, ;  jv, ꦗꦮ;  su,  ) is one of the  Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the  Java Sea to the north. With a population of 151.6&nbsp;million people, Java is the world's  mo ...<br></span></div> plugins to "click-to-play" mode instead of automatically running them. It also added support for <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/H.264.html"  "title="H.264">H.264</a><span class="linkinfotext"> 




Advanced Video Coding (AVC), also referred to as H.264 or MPEG-4 Part 10, is a  video compression standard based on block-oriented,  motion-compensated coding. It is by far the most commonly used format for the recording, compression, and distr ...<br></span></div> on Linux, password manager support for script-generated fields, and the ability for Windows users without advanced write permissions to update Firefox, as well as many bug fixes and developer-related changes.<ref name="Firefox 26.0"></ref>

Firefox 27 was released on February 4, 2014. It adds improved Social API and <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/SPDY.html"  "title="SPDY">SPDY</a><span class="linkinfotext"> 


SPDY (pronounced "speedy") is an obsolete  open-specification communication protocol developed for transporting  web content. SPDY became the basis for  HTTP/2 specification. However, HTTP/2 diverged from SPDY and eventually HTTP/2 subsumed all u ...<br></span></div> 3.1 support, as well as enabling of TLS 1.1 and 1.2 by default after having been tested through a toggle in <code>about:config</code> since version 24, released on September 17, 2013. Also, it brings many bug fixes, security improvements, and developer-related changes.<ref name="Firefox 27.0"></ref>

Firefox 28 was released on March 18, 2014. It added support for VP9 video decoding and support for Opus in WebM.<ref name="Firefox 28.0"></ref> For  <a class="link_plain"; href="/html/ALL/l/Android_(operating_system).html" ;"title="Android (operating system)">Android</a>, features such as predictive lookup from the address bar, quick share buttons and support for <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/OpenSearch.html"  "title="OpenSearch">OpenSearch</a><span class="linkinfotext"> 


OpenSearch is a collection of technologies that allow the publishing of search results in a format suitable for syndication and  aggregation. Introduced in 2005, it is a way for  websites and search engines to publish search results in a standard ...<br></span></div> were added.<ref name="Firefox 28 released"></ref>

Firefox 29 was released on April 29, 2014, and includes the Australis interface, it also removes the add-on bar and moves its content to the navigation bar.<ref name="Firefox 29.0"></ref> Additionally, it introduced automatic correction of protocol typos to the address bar, meaning that, for example, <code>ttps://</code> is automatically corrected to <code>https://</code>.

Firefox 30 was released on June 10, 2014. It adds support for <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/GStreamer.html"  "title="GStreamer">GStreamer</a><span class="linkinfotext"> 


GStreamer is a  pipeline-based  multimedia framework that links together a wide variety of media processing systems to complete complex workflows. For instance, GStreamer can be used to build a system that reads files in one format, processes the ...<br></span></div> 1.0 and a new sidebar button, and most plugins are not activated by default.<ref name="Firefox 30.0"></ref>


<h2><br><p>  Firefox 31 through 37 </h2></p>
Firefox 31 and Firefox 31 ESR were released on July 22, 2014. Both versions added  <a class="link_plain"; href="/html/ALL/l/search_field.html" ;"title="search field">search field</a> on the new tab page and were improved to block <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/malware.html"  "title="malware">malware</a><span class="linkinfotext"> 



Malware (a portmanteau for ''malicious software'') is any software intentionally designed to cause disruption to a computer, server,  client, or computer network, leak private information, gain unauthorized access to information or systems, depr ...<br></span></div> from downloaded files, along with other new features.<ref name="Firefox 31.0"></ref> Firefox 31 ESR is the first ESR to include the Australis interface, unifying the user experience across different Firefox versions. Firefox 24.x.x ESR versions would be automatically updated to ESR version 31 after October 14, 2014.<ref name="Firefox ESR Release Cycle"></ref>

Firefox 32 was released on September 2, 2014. It shows off HTTP  <a class="link_plain"; href="/html/ALL/l/cache_(computing).html" ;"title="cache (computing)">caching</a> improvements, adds <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/HiDPI.html"  "title="HiDPI">HiDPI</a><span class="linkinfotext"> 
Pixels per inch (ppi) and pixels per centimetre (ppcm or pixels/cm) are measurements of the pixel density of an electronic image device, such as a computer monitor or television display, or image digitizing device such as a  camera or image scanner ...<br></span></div>/<div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Retina_Display.html"  "title="Retina Display">Retina</a><span class="linkinfotext"> 





The retina (from  la, rete "net") is the innermost, light-sensitive layer of tissue of the  eye of most  vertebrates and some  molluscs. The optics of the eye create a  focused two-dimensional image of the visual world on the retina, which the ...<br></span></div> support in the Developer Tools UI and widens HTML5 support, among other things.<ref name="Firefox 32.0"></ref>

Firefox 33 was released on October 14, 2014. It now has ''off-main-thread compositing'' (OMTC) enabled by default on Windows (which brings <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/responsiveness.html"  "title="responsiveness">responsiveness</a><span class="linkinfotext"> 



Responsiveness as a concept of computer science refers to the specific ability of a system or functional unit to complete assigned tasks within a given time. For example, it would refer to the ability of an artificial intelligence system to unde ...<br></span></div> improvements),  <a class="link_plain"; href="/html/ALL/l/OpenH264.html" ;"title="OpenH264">OpenH264</a> support, search suggestions on about:home and about:newtab, <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/address_bar.html"  "title="address bar">address bar</a><span class="linkinfotext"> 



In a web browser, the address bar (also location bar or URL bar) is the element that shows the current URL. The user can type a URL into it to navigate to a chosen website. In most modern browsers, non-URLs are automatically sent to a search eng ...<br></span></div> search improvements,  <a class="link_plain"; href="/html/ALL/l/session_(computer_science).html" ;"title="session (computer science)">session</a> restore reliability improvements, and other changes.<ref name="Firefox 33.0"></ref>

Firefox 33.1 was released on November 10, 2014, celebrating Firefox's 10-year anniversary.<ref name="Firefox 33.1"></ref><ref name=FirefoxDecade></ref> Firefox 33.1.1 was released for desktop only on November 14, 2014, fixing a startup crash.<ref name="Firefox 33.1.1"></ref>

<img  title="Firefox-hello-logo"; style="text-decoration: none; height:150px;float: left; padding: 0px 3px 0px 0px;"src="https://upload.wikimedia.org/wikipedia/commons/a/ab/Firefox-hello-logo.svg" >
Firefox 34 was released on December 1, 2014. It brings ''Firefox Hello'' (a <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/WebRTC.html"  "title="WebRTC">WebRTC</a><span class="linkinfotext"> 


WebRTC (Web Real-Time Communication) is a free and open-source project providing web browsers and mobile applications with real-time communication (RTC) via application programming interfaces (APIs). It allows audio and video communication to wor ...<br></span></div> client for voice and video chat), an improved  <a class="link_plain"; href="/html/ALL/l/search_bar.html" ;"title="search bar">search bar</a>, and the implementation of  <a class="link_plain"; href="/html/ALL/l/HTTP/2.html" ;"title="HTTP/2">HTTP/2</a> (draft14) and  <a class="link_plain"; href="/html/ALL/l/Application-Layer_Protocol_Negotiation.html" ;"title="Application-Layer Protocol Negotiation">ALPN</a>, together with other features. It also disables  <a class="link_plain"; href="/html/ALL/l/SSLv3.html" ;"title="SSLv3">SSLv3</a>, and enables the ability to recover from a locked Firefox process and to switch themes and personas directly in the customization mode.<ref name="Firefox 34.0"></ref>

Firefox 35 was released on January 13, 2015. It brings support for a room-based conversations model to the Firefox Hello chat service, and other functions, it also includes security fixes.<ref name="Firefox 35.0"></ref>

Firefox 36 was released for desktop on February 24, 2015, bringing full  <a class="link_plain"; href="/html/ALL/l/HTTP/2.html" ;"title="HTTP/2">HTTP/2</a> support and other smaller improvements and fixes.<ref name="Firefox 36.0"></ref> It was also released for Android three days later on February 27, 2015, adding support for the tablet user interface.<ref name="Firefox 36.0 Mobile"></ref>

Firefox 37 was released on March 31, 2015, bringing a heartbeat user rating system, which provides user feedback about the Firefox, and improved protection against website impersonation via OneCRL centralized certificate revocation. Also, Bing search is changed to use HTTPS for secure searching, and added is support for opportunistic encryption of the HTTP traffic where the server supports HTTP/2's AltSvc feature.<ref name="Firefox 37.0"></ref><ref name="Firefox 37.0 Mobile"></ref>


<h2><br><p>  Firefox 38 through 44 </h2></p>
Both Firefox 38 and Firefox 38 ESR were released on May 12, 2015, with new tab-based preferences, Ruby annotation support and availability of WebSockets in web workers, along with the implementation of the BroadcastChannel API and other features and security fixes.<ref name="Firefox 38.0"></ref>

Firefox 39 was released on July 2, 2015, for desktop and Android, disabling insecure  <a class="link_plain"; href="/html/ALL/l/SSLv3.html" ;"title="SSLv3">SSLv3</a> and <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/RC4.html"  "title="RC4">RC4</a><span class="linkinfotext"> 




In cryptography, RC4 (Rivest Cipher 4, also known as ARC4 or ARCFOUR, meaning Alleged RC4, see below) is a stream cipher. While it is remarkable for its simplicity and speed in software, multiple vulnerabilities have been discovered in RC4, ren ...<br></span></div>, improving performance for IPv6 fallback to IPv4 and including various security fixes.<ref name="Firefox 39.0 Mobile"></ref><ref name="Firefox 39.0"></ref> Firefox 39.0.3 was released on August 6, 2015, to fix a zero-day exploit.<ref name="Firefox 39.0.3"></ref>

Firefox 40 was released on August 11, 2015, for desktop and Android. On <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Windows_10.html"  "title="Windows 10">Windows 10</a><span class="linkinfotext"> 










Windows 10 is a major release of  Microsoft's  Windows NT operating system. It is the direct successor to Windows 8.1, which was released nearly two years earlier. It was  released to manufacturing on July 15, 2015, and later to retail on ...<br></span></div>, the Australis theme was updated to reflect the overall appearance of Windows 10, and the interface is adapted for usability on <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/touchscreen.html"  "title="touchscreen">touchscreen</a><span class="linkinfotext"> 


A touchscreen or touch screen is the assembly of both an input ('touch panel') and output ('display') device. The touch panel is normally layered on the top of an electronic visual display of an  information processing system. The display is ofte ...<br></span></div>s when used in the operating system's "Tablet mode". Firefox 40 includes additional security features, including the filtering of pages that offer <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/potentially_unwanted_program.html"  "title="potentially unwanted program">potentially unwanted program</a><span class="linkinfotext"> 
A potentially unwanted program (PUP) or potentially unwanted application (PUA) is software that a user may perceive as unwanted or unnecessary. It is used as a subjective tagging criterion by security and parental control products. Such software ma ...<br></span></div>s, and warnings during the installation of unsigned extensions; in future versions, signing of extensions will become mandatory, and the browser will refuse to install extensions that have not been signed. Firefox 40 also includes performance improvements, such as off-main-thread compositing on Linux.<ref name=engadget-fx40></ref><ref name="Firefox 40.0"></ref><ref name="Firefox 40.0 Mobile"></ref>

Firefox 41 was released on September 22, 2015, for desktop and Android. Among many additions are the ability to set a profile picture for a Firefox account, enhanced <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/input_method_editor.html"  "title="input method editor">IME</a><span class="linkinfotext"> 


Ime is a village in Lindesnes municipality in Agder county, Norway. The village is located on the east side of the river Mandalselva, along the European route E39 highway. Ime is an eastern suburb of the town of Mandal. Ime might be considered to ...<br></span></div> support using <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Text_Services_Framework.html"  "title="Text Services Framework">Text Services Framework</a><span class="linkinfotext"> 

The Text Services Framework (TSF) is a  COM  framework and  API in Windows XP and later Windows operating systems that supports advanced text input and text processing. The Language Bar is the core user interface for Text Services Framework.
 Over ...<br></span></div>, and instant messaging on Firefox Hello.<ref name="Firefox 41.0"></ref><ref name="Firefox 41.0 Mobile"></ref>

Firefox 42 was released on November 3, 2015, for desktop and Android. Among many additions are private browsing with tracking protection, IPv6 support in WebRTC, and the ability to view HTML source in a tab.<ref name="Firefox 42.0"></ref><ref name="Firefox 42.0 Mobile"></ref>

Firefox 43 was released on December 15, 2015, for desktop and Android. Among many additions are the availability of the 64-bit version for Windows 7 and above, a new strict blocklist, and audio indicators on Android.<ref name="Firefox 43.0"></ref><ref name="Firefox 43.0 Mobile"></ref>

Firefox 44 was released on January 26, 2016, for desktop and Android. Among many additions are the improvement of warning pages for certificate errors and untrusted connections, enabling of H.264 and WebM/VP9 video support on systems that don't support MP4/H.264, support for the brotli compression format via HTTPS content-encoding, and the use of Android print service to enable cloud printing.<ref name="Firefox 44.0"></ref><ref name="Firefox 44.0 Mobile"></ref> "Ask me every time" cookies option was removed without any notifications.


<h2><br><p>  Firefox 45 through 51 </h2></p>
Firefox 45 and Firefox 45 ESR were released on March 8, 2016, for desktop (both) and Android (no ESR). Among many additions were Instant Browser sharing through Hello, the addition of Guarani locale, the ability to filter snapshot output in memory tool, and the removal of the Tab Groups (panorama) feature.<ref name="Firefox 45.0"></ref><ref name="Firefox 45.0 Mobile"></ref>

Firefox 46 was released on April 26, 2016, for both desktop and Android. Among the many additions were improved security of the JavaScript Just In Time (JIT) Compiler, the GTK3 integration (Linux only), HKDF support for Web Crypto API, and removal of support for Android 3.0 (Android only).<ref name="Firefox 46.0"></ref><ref name="Firefox 46.0 Mobile"></ref>

Firefox 47 was released on June 7, 2016, for both desktop and Android. Among the many additions were support for Google's Widevine CDM on Windows and Mac OS X so streaming services like Amazon Video can switch from Silverlight to encrypted HTML5 video; enabling VP9 video codec for users with fast machines; the ability of embedded YouTube videos to play with HTML5 video if Flash is not installed; and the addition of the <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Latgalian_language.html"  "title="Latgalian language">Latgalian language</a><span class="linkinfotext"> 




Latgalian (''latgalīšu volūda'',  lv, latgaliešu valoda) is an  Eastern Baltic language belonging to the  Baltic branch often spoken in Latgale, the eastern part of Latvia. It is debated whether it is a separate language with heavy Latvian  ...<br></span></div>. It is also the last Firefox version to support Android 2.3.x.<ref name="Firefox 47.0"></ref><ref name="Firefox 47.0 Mobile"></ref>

Firefox 48 was released on August 2, 2016, for both desktop and Android. Among the many additions were enhanced download protection and the removal of the Windows Remote Access Service modem Autodial. It was also the first official release with  <a class="link_plain"; href="/html/ALL/l/features_of_Firefox#Electrolysis_and_WebExtensions.html" ;"title="features of Firefox#Electrolysis and WebExtensions">"Electrolysis"</a> (multi-process Firefox, meaning that the interface and web pages are running in separate processes in the computer) was enabled.

Firefox 48 is the last Firefox version to support <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Mac_OS_X_Snow_Leopard.html"  "title="Mac OS X Snow Leopard">Mac OS X Snow Leopard</a><span class="linkinfotext"> 




Mac OS X Snow Leopard (version 10.6) is the seventh  major release of macOS, Apple's desktop and server operating system for Macintosh computers.

Snow Leopard was publicly unveiled on June 8, 2009 at Apple’s  Worldwide Developers Conference. ...<br></span></div>, <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Mac_OS_X_Lion.html"  "title="Mac OS X Lion">Mac OS X Lion</a><span class="linkinfotext"> 




OS X Lion, also known as  Mac OS X Lion, (version 10.7) is the eighth  major release of macOS, Apple's desktop and server operating system for  Mac computers.

A preview of OS X 10.7 Lion was publicly shown at the "Back to the Mac"  Apple Speci ...<br></span></div>, and  <a class="link_plain"; href="/html/ALL/l/OS_X_Mountain_Lion.html" ;"title="OS X Mountain Lion">OS X Mountain Lion</a>.<ref name="Firefox 48.0"></ref> Additionally, support for old processors without <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/SSE2.html"  "title="SSE2">SSE2</a><span class="linkinfotext"> 

SSE2 (Streaming SIMD Extensions 2) is one of the Intel  SIMD (Single Instruction, Multiple Data)   processor supplementary instruction sets first introduced by Intel with the initial version of the Pentium 4 in 2000.  It extends the earlier  SSE i ...<br></span></div> extensions such as the AMD Athlon XP and Pentium III was dropped.<ref name="Firefox 48.0"/>

Firefox 49 was released on September 20, 2016, for both desktop and Android. Among the many additions were an updated Firefox Login Manager, improved video performance for users on systems that support <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/SSE3.html"  "title="SSE3">SSE3</a><span class="linkinfotext"> 

SSE3, Streaming SIMD Extensions 3, also known by its Intel code name Prescott New Instructions (PNI), is the third iteration of the  SSE instruction set for the IA-32 (x86) architecture. Intel introduced SSE3 in early 2004 with the  Prescott revis ...<br></span></div> without hardware acceleration, added <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/context_menu.html"  "title="context menu">context menu</a><span class="linkinfotext"> 




A context menu (also called contextual, shortcut, and pop up or pop-up menu) is a menu in a  graphical user interface (GUI) that appears upon user interaction, such as a right-click  mouse operation. A context menu offers a limited set of choic ...<br></span></div> controls to HTML5 audio and video that let users loop files or play files at 1.25x speed, improvements in about:memory reports for tracking font memory usage, and the removal of Firefox Hello.<ref name="Firefox 49.0"></ref><ref name="Firefox 49.0 Mobile"></ref> The <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/macOS.html"  "title="macOS">macOS</a><span class="linkinfotext"> 








macOS (; previously OS&nbsp;X and originally Mac&nbsp;OS&nbsp;X) is a  Unix operating system developed and marketed by Apple Inc. since 2001. It is the primary operating system for Apple's  Mac computers. Within the market of desktop and la ...<br></span></div> version now requires at least <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/OS_X_Mavericks.html"  "title="OS X Mavericks">OS X Mavericks</a><span class="linkinfotext"> 



OS X Mavericks (version 10.9) is the 10th  major release of macOS,  Apple Inc.'s  desktop and server operating system for Macintosh computers. OS X Mavericks was announced on June 10, 2013, at  WWDC 2013, and was released on October 22, 2013, wo ...<br></span></div>, and the <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Microsoft_Windows.html"  "title="Microsoft Windows">Microsoft Windows</a><span class="linkinfotext"> 





Windows is a group of several proprietary  graphical  operating system families developed and marketed by  Microsoft. Each family caters to a certain sector of the computing industry. For example,  Windows NT for consumers, Windows Server for  ...<br></span></div> version requires a CPU which supports <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/SSE2.html"  "title="SSE2">SSE2</a><span class="linkinfotext"> 

SSE2 (Streaming SIMD Extensions 2) is one of the Intel  SIMD (Single Instruction, Multiple Data)   processor supplementary instruction sets first introduced by Intel with the initial version of the Pentium 4 in 2000.  It extends the earlier  SSE i ...<br></span></div>.<ref name="Firefox 48.0"/>

Firefox 50 was released on November 15, 2016, for both desktop and Android. Among the many additions were playback video on more sites without plugins with WebM EME Support for Widevine on Windows and Mac, improved performance for SDK extensions or extensions using the SDK module loader; download protection for a large number of executable file types on Windows, Mac OS, and Linux, increased availability of WebGL to more than 98 percent of users on Windows 7 and newer (desktop), and support for HLS videos via player overlay (Android).<ref name="Firefox 50.0"></ref><ref name="Firefox 50.0 Mobile"></ref>

Firefox 51 was released on January 24, 2017, for both desktop and Android. Among the many additions were added support for FLAC (Free Lossless Audio Codec) playback, better Tab Switching, support for WebGL 2, and a warning that is displayed when a login page does not have a secure connection.<ref name="Firefox 51.0"></ref><ref name="Firefox 51.0 Mobile"></ref>


<h2><br><p>  Firefox 52 through 59 </h2></p>

Firefox 52 and Firefox 52 ESR were released on March 7, 2017, for desktop (both) and Android (no ESR). An important aspect of Firefox ESR 52.0 is that it is the first ESR version based on  <a class="link_plain"; href="/html/ALL/l/features_of_Firefox#Electrolysis_and_WebExtensions.html" ;"title="features of Firefox#Electrolysis and WebExtensions">Firefox Electrolysis</a> (Firefox 48) code base. Firefox 52 added support for <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/WebAssembly.html"  "title="WebAssembly">WebAssembly</a><span class="linkinfotext"> 


WebAssembly (sometimes abbreviated Wasm) defines a portable  binary-code format and a corresponding text format for  executable programs as well as  software interfaces for facilitating interactions between such programs and their host environmen ...<br></span></div> (while disabled in Firefox ESR 52), an emerging standard that brings near-native performance to Web-based games, apps, and software libraries without the use of plugins; automatic <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/captive_portal.html"  "title="captive portal">captive portal</a><span class="linkinfotext"> 


A captive portal is a web page accessed with a  web browser that is displayed to newly connected users of a  Wi-Fi or wired network before they are granted broader access to network resources. Captive portals are commonly used to present a landin ...<br></span></div> detection, for easier access to Wi-Fi hotspots; user warnings for insecure HTTP pages with logins (desktop); and display of media controls to pause or resume playback on the Android notification bar.<ref name="Firefox 52.0"></ref><ref name="Firefox 52.0 Mobile"></ref> Firefox 52 dropped support for <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/NPAPI.html"  "title="NPAPI">NPAPI</a><span class="linkinfotext"> 
Netscape Plugin Application Programming Interface (NPAPI) was an application programming interface (API) of the web browsers that allows  plugins to be integrated.

Initially developed for Netscape browsers, starting in 1995 with  Netscape Navigato ...<br></span></div> plugins like <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Microsoft_Silverlight.html"  "title="Microsoft Silverlight">Microsoft Silverlight</a><span class="linkinfotext"> 




Microsoft Silverlight is a discontinued  application framework designed for writing and running  rich web applications, similar to  Adobe's  runtime,  Adobe Flash. A plugin for Silverlight is still available for a very small number of browsers. ...<br></span></div> and Java with the exception of Adobe Flash Player (except the ESR version which still supports NPAPI).

Firefox 53 was released on April 19, 2017, for both desktop and Android. Starting with Firefox 53, Microsoft Windows support is exclusively for <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Windows_7.html"  "title="Windows 7">Windows 7</a><span class="linkinfotext"> 




Windows 7 is a major release of the Windows NT operating system developed by Microsoft. It was Software release life cycle#Release to manufacturing (RTM), released to manufacturing on July 22, 2009, and became generally available on October 22, ...<br></span></div> and above. Among the many additions are: improved graphics stability for Windows users with the addition of compositor process separation, light and dark "compact" themes available, based on the Firefox Developer Edition theme, removal of support for 32-bit macOS and Linux support for processors older than <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Pentium_4.html"  "title="Pentium 4">Pentium 4</a><span class="linkinfotext"> 



Pentium 4 is a series of single-core CPUs for  desktops,  laptops and entry-level servers manufactured by Intel. The processors were shipped from November 20, 2000 until August 8, 2008. The production of Netburst processors was active from 2000  ...<br></span></div> and AMD Opteron; new visual design for audio and video controls, support for <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/WebM.html"  "title="WebM">WebM</a><span class="linkinfotext"> 



WebM is an audiovisual media file format. It is primarily intended to offer a  royalty-free alternative to use in the  HTML5 video and the  HTML5 audio elements. It has a sister project,  WebP, for images. The development of the format is sponso ...<br></span></div> video with <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/alpha_compositing.html"  "title="alpha compositing">alpha compositing</a><span class="linkinfotext"> 




In computer graphics, alpha compositing or alpha blending is the process of combining one image with a background to create the appearance of partial or full  transparency. It is often useful to render  picture elements (pixels) in separate pas ...<br></span></div>, which allows playing videos with transparent backgrounds (desktop), Reader Mode displaying estimated reading time for the page (desktop and Android), and enabling two columns tabs setting in portrait mode (Android).<ref name="Firefox 53.0"></ref><ref name="Firefox 53.0 Mobile"></ref>

Firefox 54 was released on June 13, 2017, for both desktop and Android. Among the many additions are: simplifying the download button and download status <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/panel_(computer_software).html"  "title="panel (computer software)">panel</a><span class="linkinfotext"> 
Panel may refer to:

  Arts and media   Visual arts 
*Panel (comics), a single image in a comic book, comic strip or cartoon; also, a comic strip containing one such image
*Panel painting, in art, either one element of a multi-element piece of art, ...<br></span></div>, added support for multiple content processes, the ability to create and save custom devices in  <a class="link_plain"; href="/html/ALL/l/responsive_web_design.html" ;"title="responsive web design">responsive web design</a> mode (desktop), improved audio and video playback in the browser, and improved bookmarks sync performance (Android).<ref name="Firefox 54.0"></ref><ref name="Firefox 54.0 Mobile"></ref>

Firefox 55 was released on August 8, 2017, for both desktop and Android. Among the many additions are: the launch of Windows support for <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/WebVR.html"  "title="WebVR">WebVR</a><span class="linkinfotext"> 



WebXR Device API is a Web application programming interface (API) that describes support for accessing augmented reality and  virtual reality devices, such as the HTC Vive, Oculus Rift, Oculus Quest, Google Cardboard, HoloLens, Magic Leap or Ope ...<br></span></div>, bringing immersive experiences to the web, options that let users optimize recent performance improvements, simplification of the installation process with a streamlined Windows stub installer, improvements to address bar functionality, simplification of printing from Reader Mode (desktop), and the option for accessibility settings to respect the system's set font size when displaying web pages (Android). This is also the last version to support <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Android_Ice_Cream_Sandwich.html"  "title="Android Ice Cream Sandwich">Android Ice Cream Sandwich</a><span class="linkinfotext"> 


Android Ice Cream Sandwich (or Android 4.0) is the 9th major version of the  Android mobile operating system developed by  Google. Unveiled on October 19, 2011, Android 4.0 builds upon the significant changes made by the tablet-only release Andro ...<br></span></div>.<ref name="Firefox 55.0"></ref><ref name="Firefox 55.0 Mobile"></ref>

Firefox 56 was released on September 28, 2017, for both desktop and Android. Among the many additions are: a new layout for the "Preferences" page, the launch of Firefox Screenshots, support for address form autofill, hardware acceleration for AES-GCM, update of the Safe Browsing protocol to version 4, improved security or verifying update downloads (desktop), improvement of support for WebExtensions, and the end of support for Adobe Flash (Android). Starting with this version, Android support is exclusively for <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Android_Jelly_Bean.html"  "title="Android Jelly Bean">Android Jelly Bean</a><span class="linkinfotext"> 



Android Jelly Bean, or Android 4.1 is the codename given to the tenth version of the  Android mobile operating system developed by Google, spanning three major  point releases (versions 4.1 through 4.3.1). Among the devices that run Android 4.1  ...<br></span></div> and above.<ref name="Firefox 56.0"></ref><ref name="Firefox 56.0 Mobile"></ref>

Another change was the introduction of the ''mozlz4'' format, a proprietary variant of the ''lz4'' compression format (.mozlz4 and .jsonlz4 file extensions instead of .json.lz4 as per unix/linux standard). Session data is stored in the ''lz4'' format instead of plain text. Firefox 56 cannot recognize the legacy plain text session files, only the ''lz4''-encoded ones.

Firefox 57 was released on November 14, 2017, for desktop and Android with the name ''Firefox Quantum''.<ref name="quantum"></ref> <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/ZDNet.html"  "title="ZDNet">ZDNet</a><span class="linkinfotext"> 



ZDNET is a business technology  news website owned and operated by  Red Ventures.
 The brand was founded on April 1, 1991, as a general interest technology portal from  Ziff Davis and evolved into an  enterprise IT-focused online publication.
 H ...<br></span></div> dubbed it a "comeback" following years of falling market share against <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Google_Chrome.html"  "title="Google Chrome">Google Chrome</a><span class="linkinfotext"> 






Google Chrome is a cross-platform web browser developed by Google. It was first released in 2008 for Microsoft Windows, built with free software components from Apple WebKit and  Mozilla Firefox. Versions were later released for Linux, macOS, ...<br></span></div>.<ref name="cnet57"></ref> The release included a new interface design, codenamed "Photon", and a new rendering engine almost twice as fast as the previous one used.<ref name="quantum" /><ref name="cnet57" /> One of the largest visual changes in Photon was the removal of the search box from the address bar. Firefox 57 no longer supports ''legacy add-ons'' using <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/XUL.html"  "title="XUL">XUL</a><span class="linkinfotext"> 



XUL ( ), which stands for XML User Interface Language, is a  user interface markup language developed by  Mozilla. XUL is an XML dialect for writing  graphical user interfaces, enabling developers to write user interface elements in a manner sim ...<br></span></div> technologies.<ref name="Firefox 57.0"></ref><ref name="Firefox 57.0 Mobile"></ref> That same day, Mozilla announced that <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Google.html"  "title="Google">Google</a><span class="linkinfotext"> 







Google LLC () is an American Multinational corporation, multinational technology company focusing on Search Engine, search engine technology, online advertising, cloud computing, software, computer software, quantum computing, e-commerce, ar ...<br></span></div> would be the default search engine in the US and Canada, a departure from <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Yahoo!_Search.html"  "title="Yahoo! Search">Yahoo</a><span class="linkinfotext"> 




Yahoo! (, styled yahoo''!'' in its logo) is an American web services provider. It is headquartered in Sunnyvale, California and operated by the namesake company Yahoo! Inc. (2017–present), Yahoo Inc., which is 90% owned by investment funds ma ...<br></span></div>, which had been the default search engine in the US and Canada since 2014.

Firefox 58 was released on January 23, 2018, for desktop and Android. Among the additions were: support for credit card autofill, the drop of support for user profiles in previous versions of Firefox, a warning to alert users and site owners of planned security changes to sites affected by the gradual distrust plan for the Symantec certificate authority (desktop), full screen bookmark management with folder support, support for FLAC (Free Lossless Audio Codec) playback, the ability to change the status bar color in themes, and removal of the Firefox Search widget from the home screen (Android).<ref name="Firefox 58.0"></ref><ref name="Firefox 58.0 Mobile"></ref>

Firefox 59 was released on March 13, 2018, for desktop and Android. Among the additions were: faster load times and improved graphics, improved Real-Time Communications (RTC) capabilities, additional features for Firefox Screenshots, support for W3C specs for pointer events, Private Browsing Mode's removal of path information from referrers to prevent cross-site tracking (desktop), and the addition of Firefox as an Assist app, support for HLS (HTTP Live Streaming) playback for improved compatibility with video sites, and removal of the "about:" page.<ref name="Firefox 59.0"></ref><ref name="Firefox 59.0 Mobile"></ref>


<h2><br><p>  Firefox 60 through 67 </h2></p>


Firefox 60 and Firefox 60 ESR were released on May 9, 2018, for desktop (both) and Android (no ESR). It includes a policy engine that allows customized Firefox deployments in enterprise environments, using Windows Group Policy or a cross-platform JSON file, enhancements to New Tab / Firefox Home, a redesigned Cookies and Site Storage section in Preferences for greater clarity and control of first- and third-party cookies, the application of Quantum CSS to render browser UI, support for Web Authentication API, which allows USB tokens for website authentication, an option for Linux users to show or hide page titles in a bar at the top of the browser, improved WebRTC audio performance and playback for Linux users (desktop), exclusive support for extensions built using the WebExtension API (ESR), the implementation of Quantum CSS (also known as Stylo) in Android for faster page rendering; and the addition of the View Page Source option to the Page Action menu (Android).<ref name="Firefox 60.0"></ref><ref name="Firefox 60.0esr"></ref><ref name="Firefox 60.0 Mobile"></ref>

Firefox 61 was released on June 26, 2018, for both desktop and Android. Among the many additions were: Improvements for dark theme support across the entire Firefox user interface, added support to allow WebExtensions to hide tabs, improved bookmark syncing, convenient access to more search engines (desktop), improved security and enhanced performances (both), and the fix for a recurring crash on Samsung Galaxy S8 devices running Android Oreo (Android).<ref name="Firefox 61.0"></ref><ref name="Firefox 61.0 Mobile"></ref>

Firefox 62 was released on September 5, 2018, for both desktop and Android. Among the many additions were: FreeBSD support for WebAuthn, a preference that allows users to distrust certificates issued by Symantec in advance of removing all trust for Symantec-issued certificates in Firefox 63, improved graphics rendering for Windows users without accelerated hardware using Parallel-Off-Main-Thread Painting, CSS Variable Fonts (OpenType Font Variations) support, support for CSS Shapes, allowing for richer web page layouts (desktop), improved scrolling performance, faster page load times over Wi-Fi connections by loading from the network cache if disk cache is slow, and "Product and feature tips" toggle in Notifications settings (Android).<ref name="Firefox 62.0"></ref><ref name="Firefox 62.0 Mobile"></ref> The bookmarks' Description field was deprecated and will be removed completely in future releases.

Firefox 63 was released on October 23, 2018, for both desktop and Android. Among the many additions and changes were: Performance and visual improvements for Windows and macOS users, content blocking, WebExtensions running in their own process in Linux, recognition of the operating system accessibility setting for reducing animation, the addition of <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Amazon_(company).html"  "title="Amazon (company)">Amazon</a><span class="linkinfotext"> 

Amazon most often refers to:

*  Amazons, a tribe of female warriors in Greek mythology
*  Amazon rainforest, a rainforest covering most of the Amazon basin
*  Amazon River, in South America
*  Amazon (company), an American multinational technolog ...<br></span></div> and <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Google.html"  "title="Google">Google</a><span class="linkinfotext"> 







Google LLC () is an American Multinational corporation, multinational technology company focusing on Search Engine, search engine technology, online advertising, cloud computing, software, computer software, quantum computing, e-commerce, ar ...<br></span></div> as Top Sites tiles on the Firefox Home (New Tab) page, the removal of the "Never Check for Updates" option from "about:preferences" and "Open in Sidebars" feature from the Library (desktop), support for Picture-In-Picture video, and use of notification channels (Android).<ref name="Firefox 63.0"></ref><ref name="Firefox 63.0 Mobile"></ref>

Firefox 64 version 64.0 was released on December 11, 2018, for desktop only. Firefox 64 for desktop provides better recommendations, enhanced tab management, easier performance management, improved performance for Mac and Linux users by enabling link time optimization (Clang LTO), more seamless sharing on Windows, the option to remove add-ons using the context menu on their toolbar buttons, TLS certificates issued by Symantec that are no longer trusted by Firefox, and the availability of WebVR on macOS.<ref name="Firefox 64.0"></ref> Three days later, version 64.0.1 was released for Android only. Firefox 64 for Android provides faster and more responsive scrolling and fixes for performance lags for users with installed password manager apps and an issue that resulted in the loading indicator using too much of the CPU and power.<ref name="Firefox 64.0.1 Mobile"></ref>

Firefox 65 was released on January 29, 2019, for both desktop and Android. Among the many additions and changes were: improved performance and web compatibility, with support for the <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/WebP.html"  "title="WebP">WebP</a><span class="linkinfotext"> 




WebP is an image file format developed by Google intended as a replacement for JPEG,  PNG, and  GIF file formats. It supports both lossy and  lossless compression, as well as animation and alpha transparency.

Google announced the WebP format i ...<br></span></div> image format; enhanced security for macOS, Linux, and Android users via stronger stack smashing protection which is now enabled by default for all platforms (both desktop and Android); enhanced tracking protection; updated language settings in Preferences; support for Handoff on macOS; a better video streaming experience for Windows users; easier performance management; an improved pop-up blocker; the availability of Firefox for Windows with 32- and 64-bit MSI installers for easier enterprise deployments; additional support for Flexbox (desktop); and the restoration of Chromecast controls to the location bar (Android).<ref name="Firefox 65.0"></ref><ref name="Firefox 65.0 Mobile"></ref>

Firefox 66 was released on March 19, 2019, for both desktop and Android. Among the many additions and changes were: Prevention of websites from automatically playing sound, smoother scrolling (both), an improved search experience and performance and better user experience for extensions, the addition of basic support for macOS Touch Bar and of support for Windows Hello on Windows 10, the enabling of AV1 support on 32-bit Windows and MacOS (desktop), and the addition of support to open files from external storage, such as an SD card (Android).<ref name="Firefox 66.0"></ref><ref name="Firefox 66.0 Mobile"></ref>

Firefox 67 was released on May 21, 2019, for both desktop and Android. Among the many additions and changes were: Lowering priority of setTimeout during page load; suspending (unloading) unused tabs to clear <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/RAM.html"  "title="RAM">memory</a><span class="linkinfotext"> 






Memory is the faculty of the  mind by which  data or  information is  encoded, stored, and retrieved when needed. It is the retention of information over time for the purpose of influencing future action. If  past events could not be remember ...<br></span></div>; the ability to block known <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/cryptominer.html"  "title="cryptominer">cryptominer</a><span class="linkinfotext"> 






A cryptocurrency, crypto-currency, or crypto is a digital currency designed to work as a medium of exchange through a  computer network that is not reliant on any central authority, such as a  government or bank, to uphold or maintain it. It  ...<br></span></div>s and <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/fingerprint.html"  "title="fingerprint">fingerprint</a><span class="linkinfotext"> 






A fingerprint is an impression left by the friction ridges of a human finger. The recovery of partial fingerprints from a crime scene is an important method of forensic science. Moisture and grease on a finger result in fingerprints on surfac ...<br></span></div>ers in the Custom settings of the Content Blocking preferences; improvement of keyboard accessibility; usability and security improvements in Private Browsing; protection against running older versions of the browser which can lead to data corruption and stability issues (desktop); a new Firefox search widget with voice input; and removal of the Guest Session feature ostensibly to "streamline" user experience (Android).<ref name="Firefox 67.0"></ref><ref name="Firefox 67.0 Mobile"></ref>


<h2><br><p>  Firefox 68 through 77 </h2></p>



Firefox 68 and Firefox 68 ESR were released on July 9, 2019, for desktop (both) and Android (no ESR). Among the many additions were: Expansion of Dark Mode in Reader view, a new reporting feature in <nowiki>about:addons</nowiki>, cryptomining and fingerprinting protections, WebRender for Windows 10, Windows Background Intelligent Transfer Service (BITS) update download support (desktop), user and enterprise added certificates read from the OS by default (68 ESR), improved web page painting performance by avoiding redundant calculations during paint, and introduction of WebAuthn (the Web Authentication API; Android).<ref name="Firefox 68.0"></ref><ref name="Firefox 68.0esr"></ref><ref name="Firefox 68.0 Mobile"></ref>

Firefox 68.1 was released on September 3, 2019, for Android only, with the addition of on-by-default Enhanced Tracking Protection, which enabled users to benefit from protections against ad, social, and analytics trackers.<ref name="Firefox 68.1 Android"></ref>

Firefox 69 was released on September 3, 2019, for desktop only. Among the additions were: Enhanced Tracking Protection; the Block Autoplay feature; support for the Web Authentication HmacSecret extension via Windows Hello for versions of Windows 10 May 2019 or newer; support for receiving multiple video codecs; JIT support for ARM64; and improvements for download UI, performance (Windows 10), and battery life (macOS).<ref name="Firefox 69.0"></ref>

Firefox 68.2 was released on October 22, 2019, for Android only, gaining the ability to sign in to a Firefox account from the onboarding experience as well as from the new tab page, and resolving a crash in the "Welcome" screen.<ref name="Firefox 68.2 Android"></ref>

Firefox 70 was released on October 22, 2019, for desktop only. Among the additions were: more privacy protection from Enhanced Tracking Protection; more security protection from Firefox Lockwise; improvements to core engine components for better browsing on more sites; a stand-alone Firefox account menu for easy access to Firefox services like Monitor and Send; the dark mode preference for built-in Firefox pages; and inactive CSS.<ref name="Firefox 70.0"></ref>

Firefox 68.3 was released on December 3, 2019, for Android only, gaining the updates to improve performance and stability.<ref name="Firefox 68.3 Android"></ref>

Firefox 71 was released on December 3, 2019, for desktop only. Among the additions were: improvements to the integrated password manager Lockwise; more information about Enhanced Tracking Protection in action; picture-in-picture for Windows; and native MP3 decoding on Windows, Linux, and macOS.<ref name="Firefox 71.0"></ref>

Firefox 68.4 was released on January 7, 2020, for Android only, gaining various security fixes.<ref name="Firefox 68.4 Android"></ref>

Firefox 72 was released on January 7, 2020, for desktop only. Among the additions were: the replacement of notification request pop-ups; the ETP blocking fingerprinting scripts by default; the availability of picture-in-picture video for macOS and Linux; and the removal of support for blocking images from individual domains because of low usage and poor user experience.<ref name="Firefox 72.0"></ref>

Firefox 68.5 was released on February 11, 2020, for Android only, updating messaging card on the homescreen to inform users about upcoming releases and gaining various security and stability fixes.<ref name="Firefox 68.5 Android"></ref>

Firefox 73 was released on February 11, 2020, for desktop only. Among the additions were: a new global default zoom level setting, a "readability backplate" solution which places a block of background color between the text and background image, improved audio quality when playing back audio at a faster or slower speed, a prompt to save logins if a field in a login form was modified, and rolling out WebRender to laptops with Nvidia graphics cards with drivers newer than 432.00, and screen sizes smaller than 1920x1200.<ref name="Firefox 73.0"></ref>

Firefox 68.6 was released on March 10, 2020, for Android only, gaining various security and stability fixes.<ref name="Firefox 68.6 Android"></ref>

Firefox 74 was released on March 10, 2020, for desktop only. Additions included: improvement of login management with the ability to reverse alpha sort (Name Z-A) in Lockwise; simple importing of bookmarks and history from <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Microsoft_Edge.html"  "title="Microsoft Edge">Microsoft Edge</a><span class="linkinfotext"> 



Microsoft Edge is a proprietary, cross-platform web browser created by Microsoft. It was first released in 2015 as part of Windows 10 and Xbox One and later  ported to other platforms as a fork of Google's  Chromium open-source project:  Android ...<br></span></div> on Windows and Mac; use of Add-ons Manager to remove add-ons installed by external applications; <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Facebook.html"  "title="Facebook">Facebook</a><span class="linkinfotext"> 










Facebook is an online  social media and  social networking service owned by American company  Meta Platforms. Founded in 2004 by  Mark Zuckerberg with fellow  Harvard College students and roommates  Eduardo Saverin, Andrew McCollum,  Dust ...<br></span></div> Container, which prevents Facebook from tracking across the web; and support for mDNS ICE.<ref name="Firefox 74.0"></ref> Initially, this release was also the first with  <a class="link_plain"; href="/html/ALL/l/Transport_Layer_Security.html" ;"title="Transport Layer Security">TLS 1.0 and 1.1</a> disabled. However, out of concern for access to information during the  <a class="link_plain"; href="/html/ALL/l/COVID-19_pandemic.html" ;"title="COVID-19 pandemic">concurrent pandemic</a>, this change was rolled back.<ref name="TLS 1.0 and TLS 1.1"></ref>

Firefox 68.7 was released on April 7, 2020, for Android only, gaining various security and stability fixes.<ref name="Firefox 68.7 Android"></ref>

Firefox 75 was released on April 7, 2020, for desktop only. Additions included: a number of improvements with Firefox's revamped address bar; the local cache of all trusted Web PKI Certificate Authority certificates known to Mozilla; the availability of Firefox in Flatpak on Linux; and the integration of Direct Composition on Windows.<ref name="Firefox 75.0"></ref>

Firefox 68.8 was released on May 5, 2020, for Android only, gaining various security and stability fixes.<ref name="Firefox 68.8 Android"></ref>

Firefox 76 was released on May 5, 2020, for desktop only. Additions included: strengthened protections for online account logins and passwords, with innovative approaches to managing accounts during this critical time; allowing multitasking in Picture-in-Picture; support for Audio Worklets that will allow more complex audio processing like VR and gaming on the web; and two updates to the address bar improving its usability and visibility.<ref name="Firefox 76.0"></ref>

Firefox 68.9 was released on June 2, 2020, for Android only, gaining various security and stability fixes.<ref name="Firefox 68.9 Android"></ref>

Firefox 77 was released on June 2, 2020, for desktop only. Additions included: pocket recommendations on Firefox' new tab for UK users; a new <nowiki>about:certificate</nowiki> page; and the removal of the <nowiki>browser.urlbar.oneOffSearches</nowiki> preference.<ref name="Firefox 77.0"></ref>

Firefox 68.10 was released on June 30, 2020, for Android only, gaining various security and stability fixes.<ref name="Firefox 68.10 Android"></ref>

Firefox 68.11 was released on July 27, 2020, for Android only, gaining various security and stability fixes. With the first stable release of Firefox Daylight (Fenix), Firefox 68.11 is the last release for Firefox for Android codenamed Fennec.<ref name="Firefox 68.11 Android"></ref>


<h2><br><p>  Firefox 78 through 90 </h2></p>


Firefox 78 and Firefox 78 ESR were released on June 30, 2020, for desktop. Among the many additions were: the Protections Dashboard, the addition of the Refresh button to the Uninstaller, a new WebRender rolled out to Windows users with Intel GPUs, the addition of Pocket Recommendations to users in the UK, the requirement of GNU libc 2.17, libstdc++ 4.8.1 and GTK+ 3.14 or newer versions on <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Linux.html"  "title="Linux">Linux</a><span class="linkinfotext"> 





Linux (  or  ) is a family of  open-source  Unix-like  operating systems based on the  Linux kernel, an operating system kernel first released on September 17, 1991, by  Linus Torvalds. Linux is typically packaged as a  Linux distribution, whi ...<br></span></div>, the disabling of TLS 1.0 and 1.1 and other improvements; and the addition of Kiosk Mode, client certificates, Service Worker and Push APIs, the Block Autoplay feature, picture-in-picture support, and the management of web certificates in about:certificate in 78 ESR.<ref name="Firefox 78.0"></ref><ref name="Firefox 78.0esr"></ref>

Firefox 79 was released on July 28, 2020, for desktop, and on August 27 for Android. Among the many additions were: a new WebRender rolled out to Windows users with Intel and AMD GPUs, the addition of Pocket Recommendations to users in Germany, the fixes for several crashes while using a screen reader, and updates to the password policy (desktop); the enabling of Enhanced Tracking Protection by default, the ability to switch to Dark Mode, and video multitasking with Picture-in-Picture mode (Android).<ref name="Firefox 79.0"></ref><ref name="Firefox 79.0 Android"></ref>

Firefox 80 was released on August 25, 2020, for desktop, and on August 31 for Android. Among the many additions were: the setting as the default system PDF viewer; the new add-ons blocklist enabled to improve performance and scalability; support for RTX and Transport-cc for improved call quality in poor network conditions and better bandwidth estimation and better compatibility with many websites using WebRTC (desktop); and the return of the Back button (Android).<ref name="Firefox 80.0"></ref><ref name="Firefox 80.0 Android"></ref>

Firefox 81 was released on September 22, 2020, for desktop and Android. Among the many additions were: the ability to pause or play audio or video right from the keyboard or headset; the introduction of the Alpenglow theme; the ability to save, manage, and auto-fill credit card information for U.S. and Canada users; the support of Acroform, which allows users to fill in, print, and save supported PDF forms; the automatic revelation of the Bookmarks toolbar; the expansion of <nowiki>.xml, .svg, and .webp</nowiki>; and fixes for browser native HTML5 audio/video controls (desktop); and the introduction of Firefox Daylight (Android).<ref name="Firefox 81.0"></ref><ref name="Firefox 81.0 Android"></ref>

Firefox 82 was released on October 20, 2020, for desktop and Android. Among the many additions were: a number of improvements that make watching videos more delightful; improved performance on both page loads and start up time; saving a webpage to Pocket from the Firefox toolbar (desktop); the ability to automatically purge cookies from sites not visited in 30 days; and better support for opening links in Firefox from third-party apps (Android).<ref name="Firefox 82.0"></ref><ref name="Firefox 82.0 Android"></ref>

Firefox 83 was released on November 17, 2020, for desktop and Android. Among the many additions were: significant updates to SpiderMonkey and JavaScript engine and replacement of the part of the JavaScript engine that helps to compile and display websites for the user; the introduction of the HTTPS-Only Mode; the support of pinch zooming for users with Windows touchscreen devices and touchpads on Mac devices; support of keyboard shortcuts for fast forwarding and rewinding videos in Picture-in-Picture; improved user interface; improved functionality and design for a number of Firefox search features; support of Acroform (desktop); and newly supported add-ons: FoxyProxy, Bitwarden, AdGuard AdBlocker, Tomato Clock, LeechBlock NG, Web Archives, and Ghostery (Android).<ref name="Firefox 83.0"></ref><ref name="Firefox 83.0 Android"></ref>

Firefox 84 was released on December 15, 2020, for desktop and Android. Among the many additions were: native support for macOS devices built with Apple silicon CPUs; the rollout of WebRender to MacOS Big Sur, Windows devices with Intel Gen 6 GPUs, and Intel laptops running Windows 7 and 8, and an accelerated rendering pipeline for Linux/GNOME/X11 users for the first time; the use of more modern techniques for allocating shared memory on Linux, improving performance and increasing compatibility with Docker (desktop); the option to view open tabs side by side in a grid view; the ability to delete downloaded files within the app; the rollout of WebRender to more users on the Mali-G GPU series; and improvement of scrolling accuracy and control and fix of cases of unexpected scroll acceleration (Android).<ref name="Firefox 84.0"></ref><ref name="Firefox 84.0 Android"></ref>

Firefox 85 was released on January 26, 2021, for desktop and Android. Among the many additions were: protection from supercookies, a type of tracker that can stay hidden in the browser and track users online, even after they have cleared cookies; the ability to save and access bookmarks more easily; the ability of the password manager to have users remove all their saved logins with one click, as opposed to having to delete each login individually; the removal of <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Adobe_Flash.html"  "title="Adobe Flash">Adobe Flash</a><span class="linkinfotext"> 



Adobe Flash (formerly Macromedia Flash and FutureSplash) is a multimedia software platform used for production of animations, rich web applications, desktop applications,  mobile apps,  mobile games, and embedded web browser video players. Flash ...<br></span></div> support; and added support for the <nowiki>:focus-visible</nowiki> pseudo class (desktop).<ref name="Firefox 85.0"></ref><ref name="Firefox 85.0 Android"></ref>

Firefox 86 was released on February 23, 2021, for desktop and Android. Among the many additions were: added support for simultaneously watching multiple videos in Picture-in-Picture; improved Print functionality with a cleaner design and better integration with the computer's printer settings; credit card management and auto-fill for users in Canada; notable performance and stability improvements achieved by moving canvas drawing and WebGL drawing to the GPU process; the removal of DTLS 1.0 support or establishing WebRTC's PeerConnections (desktop), and the introduction of Total Cookie Protection to Strict Mode (both).<ref name="Firefox 86.0"></ref><ref name="Firefox 86.0 Android"></ref>

Firefox 87 was released on March 23, 2021, for desktop and Android. Among the many additions and removals were: the addition of SmartBlock, which provides stand-in scripts so that websites load properly; the new default HTTP Referrer policy (both); the improved "Highlight All" feature on Find in Page; full support for macOS built-in screen reader, VoiceOver; the disabling of the Backspace key as a navigation shortcut for the back navigation button; and the removal of Synced tabs, Recent highlights, and Pocket list from the Library menu (desktop); and the rollout of WebRender to more devices, with the following mobile GPUs now supported: Adreno 505, Adreno 506, Mali-T (Android).<ref name="Firefox 87.0"></ref><ref name="Firefox 87.0 Android"></ref>

Firefox 88 was released on April 19, 2021, for desktop and Android. Among the many additions and removals were: PDF forms supporting JavaScript embedded in PDF files; localized margin units; smooth pinch-zooming using a touchpad on Linux; isolation of <nowiki>window.name</nowiki> data to the website that created it; the removal of the "Take a Screenshot" feature from the Page Actions menu in the url bar; the disabling of FTP support; a new toggle button in the Network panel for switching between JSON formatted HTTP response and raw data (desktop); and a search engine suggestion feature (Android).<ref name="Firefox 88.0"></ref><ref name="Firefox 88.0 Android"></ref>

Firefox 89 was released on June 1, 2021, for desktop and Android. Among the many additions and removals were: core experience redesigned and remodernized to be cleaner, more inviting, and easier to use; simplified browser chrome and toolbar; clear, streamlined menus; updated prompts; inspired tab design; reduced number of alerts and messages; lighter iconography, a refined color palette, and more consistent styling throughout; enhancement of privacy of Private Browsing Mode with Total Cookie Protection; the introduction of the elastic overscroll effect known from many other applications for macOS users; added support for smart zoom; native context menus on macOS (desktop); Synced Tabs in the Tabs tray; compact menu (Android); support of Event Timing API; and support of the CSS forced-colors media query (both).<ref name="Firefox 89.0"></ref><ref name="Firefox 89.0 Android"></ref>

Firefox 90 was released on July 13, 2021, for desktop and Android. Among the many additions and removals were: the application of updates in the background when Firefox is not running on Windows; a new page called <nowiki>about:third-party</nowiki> to help identify compatibility issues caused by third-party applications in Windows; the management of exceptions to HTTPS-Only mode in <nowiki>about:preferences#privacy</nowiki>; working hyperlinks in "Print to PDF"; Version 2 of Firefox's SmartBlock feature; the addition of software WebRender for most users without its hardware accelerated version; improved software WebRender performance; removal of FTP support; support for Private Fields in DevTools; support for Fetch Metadata Request Headers; the ability to use client authentication certificates stored in hardware tokens or in Operating System storage (desktop); the ability to save, manage, and auto-fill credit card information for users shopping on Firefox; and Back/Forward Cache (aka BFCache) for webpages that use unload event listeners (Android).<ref name="Firefox 90.0"></ref><ref name="Firefox 90.0 Android"></ref>


<h2><br><p>  Firefox 91 through 101 </h2></p>

Firefox 91 and Firefox 91 ESR were released on August 10, 2021, for desktop and Android. Among the many additions and removals were: a build on Total Cookie Protection; support for logging into Microsoft, work, and school accounts using Windows single sign-on; the return of the Simplify page when printing feature; the addition of a new Scots locale; the address bar providing Switch to Tab results in Private Browsing windows; the automatic enable of High Contrast Mode when "Increase Contrast" is checked on MacOS; catch-up paints for almost all user interactions (desktop); the support of Javascript embedded in PDF files; the addition of SmartBlock; protection from supercookies; support of AcroForm; the removal of support for Adobe Flash (ESR); a “Set Firefox as your default browser” message on notification pane for new installs; the addition of eBay Search to help users with their shopping needs; and default autoplay setting updated to Blocking Audio Only (Android).<ref name="Firefox 91.0"></ref><ref name="Firefox 91.0esr"></ref><ref name="Firefox 91.0 Android"></ref>

Firefox 92 was released on September 7, 2021, for desktop and Android. Among the many additions and removals were: an automatic upgrade to HTTPS using HTTPS RR as Alt-Svc headers; support of full-range color levels for video playback on many systems; support for images containing ICC v4 profiles on macOS; access of macOS share options from the Firefox File menu; the redesign of certificate error pages for better user experience (desktop); and added support for Web Authentication API, which allows USB tokens (such as the use of USB or Bluetooth Security Key) for website authentication (Android).<ref name="Firefox 92.0"></ref><ref name="Firefox 92.0 Android"></ref>

Firefox 93 was released on October 5, 2021, for desktop and Android. Among the many additions and removals were: support for the new AVIF image format, which is based on the modern and royalty free AV1 video codec; support for filling more forms for PDF viewer; automatic unload of tabs based on their last access time, memory usage, and other attributes for Windows when available system memory is critically low; blocking downloads that rely on insecure connections, protecting against potentially malicious or unsafe downloads; improved web compatibility for privacy protections with SmartBlock 3.0; a new referrer tracking protection in Strict Tracking Protection and Private Browsing; disabling of TLS ciphersuites that use 3DES (desktop); the addition of forward, back, and reload buttons in the toolbar on tablets; the auto-fill of logins and passwords by default; and the merging of site security and privacy info into one icon (Android).<ref name="Firefox 93.0"></ref><ref name="Firefox 93.0 Android"></ref>

Firefox 94 was released on November 2, 2021, for desktop and Android. Among the many additions and removals were: a selection of six fun seasonal Colorways (available for a limited time only); the usage of Apple's low power mode for fullscreen video on sites such as <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/YouTube.html"  "title="YouTube">YouTube</a><span class="linkinfotext"> 







YouTube is a global  online video sharing and  social media platform headquartered in  San Bruno, California. It was launched on February 14, 2005, by  Steve Chen,  Chad Hurley, and  Jawed Karim. It is owned by  Google, and is the  second mo ...<br></span></div> and <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Twitch_(service).html"  "title="Twitch (service)">Twitch</a><span class="linkinfotext"> 
Twitch may refer to: 
 Biology
* Muscle contraction
** Convulsion, rapid and repeated muscle contraction and relaxation
** Fasciculation, a small, local, involuntary muscle contraction
**  Myoclonic twitch, a jerk usually caused by sudden muscle co ...<br></span></div>; the addition of <nowiki>about:unloads</nowiki>; fewer interruptions on Windows because of a background agent that will download and install updates even if Firefox is closed; improved WebGL performance and reduced power consumption for Linux users; the introduction of Site Isolation to better protect all users against side-channel attacks; support for the new Snap Layouts menus when running on <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Windows_11.html"  "title="Windows 11">Windows 11</a><span class="linkinfotext"> 






Windows 11 is the latest major release of Microsoft's Windows NT operating system, released in October 2021. It is a free upgrade to its predecessor, Windows 10 (2015), and is available for any Windows 10 devices that meet the new Windows 11  ...<br></span></div>; reduced CPU usage during socket polling for HTTPS connections; faster storage initialization; improved cold startup by reducing main thread I/O (desktop); and the new Inactive Tabs feature (Android).<ref name="Firefox 94.0"></ref><ref name="Firefox 94.0 Android"></ref>

Firefox 95 was released on December 7, 2021, for desktop and Android. Among the many additions and removals were: RLBox, a new technology that hardens Firefox against potential security vulnerabilities in third-party libraries; the addition of Firefox download from the Microsoft Store on Windows 10 and 11; reduced CPU usage on macOS in Firefox and WindowServer during event processing; reduced power usage of software decoded video on macOS, especially in fullscreen; the ability to move the Picture-in-Picture toggle button to the opposite side of the video; the enabling of Site Isolation; a User Agent override for Slack.com, which allows Firefox users to use more Call features and have access to Huddles (desktop); the new “Homepage” section in the Settings Menu; Hero Images in the "Jump Back In" section; confirmation of snack bar “Auto-close enabled” when a user enables auto-close from the tab tray; and support of Pocket (Thought Provoking Stories section) in Canada.<ref name="Firefox 95.0"></ref><ref name="Firefox 95.0 Android"></ref>

Firefox 96 was released on January 11, 2022, for desktop and Android. Among the many additions and removals were: significant improvements in noise-suppression and auto-gain-control as well as slight improvements in echo-cancellation; reduced main-thread load; the default of all cookies to having a SameSite=lax attribute which helps defend against Cross-Site Request Forgery (CSRF) attacks; the selection of printing odd/even pages (desktop); history highlights to recently visited sites; the display of better images for recent bookmarks on the home page; and improved "fill link from clipboard for Android 12 (Android).<ref name="Firefox 96.0"></ref><ref name="Firefox 96.0 Android"></ref>

Firefox 97 was released on February 8, 2022, for desktop and Android. Among the many additions and removals were: support and display for the new style of scrollbars on Windows 11; improvements to system font loading which makes opening and switching to new tabs faster in certain situations for macOS; removal of the 18 colorway themes of Firefox 94; removal of support for directly generating PostScript for printing on Linux, with the exception of printing to Postscript printers (desktop); and the addition of a new prompt when users attempt to leave private browsing with active downloads (Android).<ref name="Firefox 97.0"></ref><ref name="Firefox 97.0 Android"></ref>

Firefox 98 was released on March 8, 2022, for desktop and Android. Among the many additions were: a new optimized download flow, in which, instead of prompting every time, files will download automatically; allowing users to choose from a number of built-in search engines to set as their default (desktop); the ability to change Wallpapers on Homepage; and the ability to clear cookies and website data for a single domain (Android).<ref name="Firefox 98.0"></ref><ref name="Firefox 98.0 Android"></ref>

Firefox 99 was released on April 5, 2022, for desktop and Android. Among the many additions were: the ability to toggle Narrate in ReaderMode with the keyboard shortcut "n"; added support for search—with or without diacritics—in the PDF viewer; support for credit card autofill and capture in Germany and France (desktop); the ability to clear cookies and data for a single domain; and improved performance of Pocket articles on the homescreen (Android).<ref name="Firefox 99.0"></ref><ref name="Firefox 99.0 Android"></ref>

Firefox 100 was released on May 3, 2022, for desktop and Android. Among the many additions were: support for captions/subtitles display on <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/YouTube.html"  "title="YouTube">YouTube</a><span class="linkinfotext"> 







YouTube is a global  online video sharing and  social media platform headquartered in  San Bruno, California. It was launched on February 14, 2005, by  Steve Chen,  Chad Hurley, and  Jawed Karim. It is owned by  Google, and is the  second mo ...<br></span></div>, Amazon <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Prime_Video.html"  "title="Prime Video">Prime Video</a><span class="linkinfotext"> 





Amazon Prime Video, also known simply as Prime Video, is an American  subscription video on-demand  over-the-top streaming and  rental service of Amazon 

Amazon most often refers to:

*  Amazons, a tribe of female warriors in Greek mythology
 ...<br></span></div>, and <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Netflix.html"  "title="Netflix">Netflix</a><span class="linkinfotext"> 





Netflix, Inc. is an American  subscription video on-demand  over-the-top  streaming service and  production company based in  Los Gatos, California. Founded in 1997 by  Reed Hastings and  Marc Randolph in Scotts Valley, California, it offers a ...<br></span></div> videos watched in Picture-in-Picture, which now supports video captions on websites that use WebVTT (Web Video Text Track) format, like Coursera.org, Canadian Broadcasting Corporation, and many more; support for HDR video on macOS; hardware accelerated AV1 video decoding on Windows with supported GPUs; video overlay on Windows for Intel GPUs, reducing power usage during video playback; improved fairness between painting and handling other events, support for credit card autofill and capture in the UK; support for profiling multiple java threads (desktop); updated History; and bookmark search (Android).<ref name="Firefox 100.0"></ref><ref name="Firefox 100.0 Android"></ref>

Firefox 101 was released on May 31, 2022, for desktop and Android. Among the many additions were: the prefers-contrast media query, which allows sites to detect if the user has requested that web content is presented with a higher (or lower) contrast; all non-configured MIME types that can now be assigned a custom action upon download completion; the use of as many microphones at the same time, during video conferencing; added support for large, small, dynamic viewport units and logical ones (*vi and *vb); added web conferencing support for enumerating and selecting multiple audio input devices through <nowiki>navigator.mediaDevices.enumerateDevices()</nowiki> (desktop); and added support for using the magnifier on Android 9+ for positioning the cursor in forms on web pages (Android).<ref name="Firefox 101.0"></ref><ref name="Firefox 101.0 Android"></ref>


<h2><br><p>  Firefox 102 through 114 </h2></p>
Firefox 102 and Firefox 102 ESR were released on June 28, 2022, for desktop and Android. Among the many additions and removals were: the ability to disable automatic opening of the download panel every time a new download starts; the mitigation of query parameter tracking when navigating sites in ETP strict mode; the availability of subtitles and captions for Picture-in-Picture (PiP) at <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/HBO_Max.html"  "title="HBO Max">HBO Max</a><span class="linkinfotext"> 




HBO Max is an American  subscription video on-demand  over-the-top  streaming service owned by  Warner Bros. Discovery. Launched in the United States on May 27, 2020, the service is built around the libraries of  HBO,  Warner Bros.,  Cartoon Ne ...<br></span></div>, <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Funimation.html"  "title="Funimation">Funimation</a><span class="linkinfotext"> 




Crunchyroll, LLC, previously known as Funimation from 1994 to 2022, is an American entertainment company owned by Japanese conglomerate Sony as a joint venture between Sony Pictures and  Sony Music Entertainment Japan's Aniplex that specializes ...<br></span></div>, <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Dailymotion.html"  "title="Dailymotion">Dailymotion</a><span class="linkinfotext"> 




Dailymotion is a French video-sharing technology platform owned by  Vivendi. North American launch partners included  Vice Media,  Bloomberg and  Hearst Digital Media. It is among the earliest known platforms to support HD (720p) resolution vid ...<br></span></div>, <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Tubi.html"  "title="Tubi">Tubi</a><span class="linkinfotext"> 




Tubi is an American  over-the-top content platform and ad-supported streaming service owned by Fox Corporation. The service was launched on April 1, 2014, and is based in Los Angeles, California. In January 2021, Tubi reached 33 million monthly ...<br></span></div>, <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Disney+_Hotstar.html"  "title="Disney+ Hotstar">Disney+ Hotstar</a><span class="linkinfotext"> 




Disney+ Hotstar (also known as Hotstar) is an Indian brand of  subscription video on-demand  over-the-top streaming service owned by  Novi Digital Entertainment of Disney Star and operated by  Disney Media and Entertainment Distribution, both d ...<br></span></div>, and <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/SonyLIV.html"  "title="SonyLIV">SonyLIV</a><span class="linkinfotext"> 


 

SonyLIV is an Indian Over-the-top media services, over-the-top freemium Streaming media, streaming platform owned by Culver Max Entertainment. SonyLIV was introduced in 2013 as the first Over-the-top media service, OTT service in India. As a s ...<br></span></div>; improved security by moving audio decoding into a separate process with stricter sandboxing, thus improving process isolation; the ability to filter style sheets in the Style Editor tab of developer tools; TransformStream and <nowiki>ReadableStream.pipeThrough</nowiki> being transferable along with WritableStream; support for Content-Security-Policy (CSP) integration with WebAssembly (desktop); and credit card autofill request to save and update card information when filling out forms (Android).<ref name="Firefox 102.0"></ref><ref name="Firefox 102.0esr"></ref><ref name="Firefox 102.0 Android"></ref>

Firefox 103 was released on July 26, 2022, for desktop and Android. Among the many additions and removals were: improved responsiveness on macOS during periods of high CPU load by switching to a modern lock API; required fields highlighted in PDF forms; improved performance on high-refresh rate monitors (120Hz+); improved Picture-in-Picture subtitles, which are now available at Funimation, Dailymotion, Tubi, Hotstar, and SonyLIV; buttons in the Tabs toolbar reachable with Tab, Shift+Tab, and Arrow keys; Windows' "Make text bigger" accessibility setting now affecting all the UI and content pages, rather than only applying to system font sizes; the browser getting pinned to the Windows taskbar during installation on Windows 10 and 11; and the removal of a configuration option to allow SHA-1 signatures in certificates, which are not supported (desktop).<ref name="Firefox 103.0"></ref><ref name="Firefox 103.0 Android"></ref>

Firefox 104 was released on August 23, 2022, for desktop and Android. Among the many additions and removals were: the availability of subtitles for Disney+ in Picture-in-Picture; support for both the scroll-snap-stop property as well as re-snapping; the ability of the Firefox profiler to analyze power usage of a website for Apple M1 and Windws 11 only, while the Firefox UI itself will now be throttled for performance and battery usage when minimized or occluded, in the same way background tabs are (desktop); and the additions of "Address Autofill" and "Delete recent history" (Android).<ref name="Firefox 104.0"></ref><ref name="Firefox 104.0 Android"></ref>

Firefox 105 was released on September 20, 2022, for desktop and Android. Among the many additions and removals were: an option to print only the current page from the print preview dialog; support for partitioned service workers in third-party contexts; a swipe to navigate (two fingers on a touchpad swiped left or right to perform history back or forward) on Windows; compliance with the User Timing L3 specification, which adds additional optional arguments to the performance.mark and performance.measure methods to provide custom start times, end times, duration, and attached details; faster searching in large lists for individual items, which replaces array.includes and array.indexOf with an optimized SIMD version; support for the Offscreen Canvas DOM API with full context and font support (desktop); and updated interface font to use the Android default font.<ref name="Firefox 105.0"></ref><ref name="Firefox 105.0 Android"></ref>

Firefox 106 was released on October 18, 2022, for desktop and Android. Among the many additions and removals were: the possibility to edit PDFs: including writing text, drawing, and adding signatures; the ability to become the default PDF application on Windows systems on setting Firefox as the default browser; the ability to pin the Windows taskbar on Windows 10 and 11 for simpler access; the redesign of private windows to increase the feeling of privacy; swipe-to-navigate (two fingers on a touchpad swiped left or right to perform history back or forward) for Linux users on Wayland; Text Recognition in images for users of macOS 10.15 and higher; the addition of "Firefox View"; the introduction of 18 new Colorways with the launch of "Independent Voices" collection; major upgrade to WebRTC capabilities (desktop); wallpapers for the "Independent Voices" collection; and the appearances of recent sync tabs in the "Jump Back In" section of the homepage (Android).<ref name="Firefox 106.0"></ref><ref name="Firefox 106.0 Android"></ref>

Firefox 107 was released on November 15, 2022, for desktop and Android. Among the many additions and removals were: improved performance of the instance when Microsoft's IME and Defender retrieve the URL of a focused document in Windows 11 version 22H2; support of power profiling (visualizing performance data recorded from web browsers) on Linux and Mac with Intel CPUs, in addition to Windows 11 and Apple Silicon; a couple of helpful improvements in DevTools making it easier to debug WebExtensions, with a new argument allowing users to automatically open DevTools just in case, and a Reload button in the DevTools toolbox to see the changes (desktop); the availability of Total Cookie Protection; enabled text selection magnifier for website text; and added support for Android image keyboards (Android).<ref name="Firefox 107.0"></ref><ref name="Firefox 107.0 Android"></ref>

Firefox 108 was released on December 13, 2022, for desktop and Android. Among the many additions and removals were: enabling by default of import maps, which allow web pages to control the behavior of JavaScript imports; processes used for background tabs getting the use of efficiency mode on <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Windows_11.html"  "title="Windows 11">Windows 11</a><span class="linkinfotext"> 






Windows 11 is the latest major release of Microsoft's Windows NT operating system, released in October 2021. It is a free upgrade to its predecessor, Windows 10 (2015), and is available for any Windows 10 devices that meet the new Windows 11  ...<br></span></div> to limit resource use; the ability to open the Process manager via the Shift+Esc keyboard shortcut; improved frame scheduling when under load; support for properly color correcting images tagged with ICCv4 profiles; support for the WebMIDI API and a new experimental mechanism for controlling access to dangerous capabilities (desktop); the ability to save web pages as PDF files to conveniently access them later from the Downloads folder; the ability to organize tabs in the tabs tray by long-pressing on a tab; and the ability to open all bookmarks in a folder in new or private tabs (Android).<ref name="Firefox 108.0"></ref><ref name="Firefox 108.0 Android"></ref>

Firefox 109 was released on January 17, 2023, for desktop and Android. Among the many additions and removals were: the enabling of Manifest Version 3 (MV3) extension support by default; the enabling of the Arbitrary Code Guard exploit protection in the media playback utility processes; the native HTML date picker for date and datetime inputs being used with a keyboard alone; a built-in dictionary for the Firefox spellchecker for builds in the Spanish and Argentine Spanish locales; and the removal of Colorways (desktop).<ref name="Firefox 109.0"></ref><ref name="Firefox 109.0 Android"></ref>



<h2><br><p>  Firefox 115 through 123 </h2></p>



<h1><br><p>  CPU architectures </h1></p><h2><br><p>  x86 family </h2></p>
Native <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/64-bit_computing.html"  "title="64-bit computing">64-bit</a><span class="linkinfotext"> 



In  computer architecture, 64-bit  integers,  memory addresses, or other  data units are those that are 64  bits wide. Also, 64-bit  CPUs and  ALUs are those that are based on  processor registers,  address buses, or  data buses of that size.  A ...<br></span></div>  <a class="link_plain"; href="/html/ALL/l/software_build.html" ;"title="software build">builds</a> are officially supported on Linux, macOS, and Windows (since version 42).<ref name="64-bit-win"></ref>

Mozilla made Firefox for 64-bit Linux a priority with the release of <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Firefox_4.html"  "title="Firefox 4">Firefox 4</a><span class="linkinfotext"> 





Mozilla Firefox 4 is a version of the Firefox web browser, released on March 22, 2011. The first beta was made available on July 6, 2010; Release Candidate 2 (a base for the final version) was released on March 18, 2011. It was codenamed  Tumu ...<br></span></div>, labeling it as tier 1 priority. Since being labeled tier 1, Mozilla has been providing official 64-bit releases for its browser for Linux. Vendor-backed 64-bit support has existed for Linux distributions such as  <a class="link_plain"; href="/html/ALL/l/SUSE_Linux.html" ;"title="SUSE Linux">Novell/SUSE Linux</a>, <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Red_Hat_Enterprise_Linux.html"  "title="Red Hat Enterprise Linux">Red Hat Enterprise Linux</a><span class="linkinfotext"> 



Red Hat Enterprise Linux (RHEL) is a  commercial  open-source  Linux distribution developed by  Red Hat for the  commercial market. Red Hat Enterprise Linux is released in server versions for  x86-64,  Power ISA,  ARM64, and  IBM Z and a desktop ...<br></span></div>, and <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Ubuntu_(operating_system).html"  "title="Ubuntu (operating system)">Ubuntu</a><span class="linkinfotext"> 





Ubuntu ( ) is a  Linux distribution based on  Debian and composed mostly of  free and open-source software. Ubuntu is officially released in three editions: '' Desktop'', ''Server'', and ''Core'' for  Internet of things devices and robots. All ...<br></span></div> prior to Mozilla's 64-bit support, even though vendors were faced with the challenge of having to turn off the 64-bit  <a class="link_plain"; href="/html/ALL/l/just-in-time_compilation.html" ;"title="just-in-time compilation">JIT compiler</a> due to its instability prior to Firefox&nbsp;4.

The official releases of Firefox for macOS are universal builds that include both 32-bit and 64-bit versions of the browser in one package, and have been this way since Firefox 4. A typical browsing session uses a combination of the 64-bit browser process and a 32-bit plugin process, because some popular plugins still are 32-bit. As of April 19, 2017, Firefox 53 has dropped support for 32-bit macOS.

The 32-bit and 64-bit versions of Windows can be used to run 32-bit Firefox.<!-- Empty reference <ref name=sysreq/>--> In late 2012, Mozilla announced 64-bit Windows builds would be stopped but later reversed the decision.<ref></ref> , 64-bit Windows builds are available as 38.0 Beta<ref name="win64-38.0beta"></ref> and newer. 64-bit builds for Windows are officially supported as of November 2015 with the release of Firefox 42.
<h2><br><p>  Other CPU architectures </h2></p>
Besides x86, Firefox also supported other CPU architectures including <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/ARMv7.html"  "title="ARMv7">ARMv7</a><span class="linkinfotext"> 









ARM (stylised in lowercase as arm, formerly an acronym for Advanced RISC Machines and originally Acorn RISC Machine) is a family of reduced instruction set computer (RISC) instruction set architectures for  computer processors, configured  ...<br></span></div>, <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/SPARC.html"  "title="SPARC">SPARC</a><span class="linkinfotext"> 




SPARC (Scalable Processor Architecture) is a  reduced instruction set computer (RISC)  instruction set architecture originally developed by  Sun Microsystems. Its design was strongly influenced by the experimental  Berkeley RISC system develope ...<br></span></div>, <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/PowerPC.html"  "title="PowerPC">PowerPC</a><span class="linkinfotext"> 




PowerPC (with the backronym Performance Optimization With Enhanced RISC – Performance Computing, sometimes abbreviated as PPC) is a reduced instruction set computer (RISC) instruction set architecture (ISA) created by the 1991 Apple– IBM– ...<br></span></div>, and <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/68k.html"  "title="68k">68k</a><span class="linkinfotext"> 



The Motorola 68000 series (also known as 680x0, m68000, m68k, or 68k) is a family of 32-bit complex instruction set computer (CISC) microprocessors. During the 1980s and early 1990s, they were popular in personal computers and workstations and w ...<br></span></div> on different tiers.<ref name="ARMv7_only"></ref> Mozilla terminated support for PowerPC-based <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Macintosh.html"  "title="Macintosh">Macintosh</a><span class="linkinfotext"> 






The Mac (known as Macintosh until 1999) is a family of personal computers designed and marketed by Apple Inc., Apple Inc. Macs are known for their ease of use and minimalist designs, and are popular among students, creative professionals, and ...<br></span></div> computers with Firefox 3.6, but a third-party project known as  <a class="link_plain"; href="/html/ALL/l/TenFourFox.html" ;"title="TenFourFox">TenFourFox</a> ported several newer versions of Firefox, the latest being based on Firefox 45 ESR.
<h1><br><p>  Mozilla Firefox timeline </h1></p>

<h1><br><p> Release compatibility</h1></p>



<h1><br><p> See also</h1></p>

* <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Timeline_of_web_browsers.html"  "title="Timeline of web browsers">Timeline of web browsers</a><span class="linkinfotext"> 

This is a timeline of web browsers from the early 1990s to the present. Prior to browsers, many technologies and systems existed for information viewing and transmission. For an in-depth history of earlier web browsers, see the web browser article ...<br></span></div>
* <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/GNU_IceCat.html"  "title="GNU IceCat">GNU IceCat</a><span class="linkinfotext"> 



GNU IceCat, formerly known as GNU IceWeasel, is a completely free version of the Mozilla Firefox web browser distributed by the GNU Project. It is compatible with Linux, Windows,  Android and macOS.

IceCat is released as a part of GNUzilla, GNU ...<br></span></div>
*  <a class="link_plain"; href="/html/ALL/l/History_of_free_and_open-source_software.html" ;"title="History of free and open-source software">History of free and open-source software</a>
*  <a class="link_plain"; href="/html/ALL/l/History_of_Mozilla_Application_Suite.html" ;"title="History of Mozilla Application Suite">History of Mozilla Application Suite</a>
* <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Mozilla_Corporation_software_rebranded_by_the_Debian_project.html"  "title="Mozilla Corporation software rebranded by the Debian project">Mozilla Corporation software rebranded by the Debian project</a><span class="linkinfotext"> 



In 2006, a branding issue developed when Mike Connor, representing the Mozilla Corporation, requested that the Debian Project comply with Mozilla standards for use of the Thunderbird trademark when redistributing the Thunderbird software. At iss ...<br></span></div>
<h1><br><p>  Explanatory notes </h1></p>



<references group=t />
<h1><br><p> References</h1></p>

<h1><br><p> Further reading</h1></p>

*  <a class="link_plain"; href="/html/ALL/l/Brendan_Eich.html" ;"title="Brendan Eich">Eich, Brendan</a> (2005)<br><a href="https://wiki.mozilla.org/Global:1.9_Trunk_1.8_Branch_Plan" target="_blank" class="mw-redirect" title=""Branch Plan"">"Branch Plan"</a><br> Mozilla Wiki. Retrieved December 21, 2005.

<h1><br><p> External links</h1></p>
<br><a href="https://www.mozilla.org/en-US/firefox/releases/" target="_blank" class="mw-redirect" title="Mozilla Firefox release notes">Mozilla Firefox release notes</a><br>for each version
<br><a href="https://developer.mozilla.org/en-US/Firefox/Releases/" target="_blank" class="mw-redirect" title="Mozilla Firefox developer release notes">Mozilla Firefox developer release notes</a><br>for each version
<br><a href="https://wiki.mozilla.org/Releases" target="_blank" class="mw-redirect" title="Releases">Releases</a><br>from MozillaWiki
<br><a href="https://www.jwz.org/blog/2016/10/they-live-and-the-secret-history-of-the-mozilla-logo/" target="_blank" class="mw-redirect" title="History of the Mozilla logo">History of the Mozilla logo</a><br>by <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Jamie_Zawinski.html"  "title="Jamie Zawinski">Jamie Zawinski</a><span class="linkinfotext"> 


Jamie Zawinski (born November 3, 1968), commonly known as jwz, is an American computer programmer,  blogger and impresario.  He is best known for his role in the creation of  Netscape Navigator,  Netscape Mail,  Lucid Emacs,  Mozilla.org, and XSc ...<br></span></div>
* 
<br><a href="http://news.bbc.co.uk/2/hi/technology/6078016.stm" target="_blank" class="mw-redirect" title="Firefox browser for web 2.0 age">Firefox browser for web 2.0 age</a><br> <div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/BBC_News.html"  "title="BBC News">BBC News</a><span class="linkinfotext"> 





BBC News is an operational business division of the  British Broadcasting Corporation (BBC) responsible for the gathering and broadcasting of news and current affairs in the UK and around the world. The department is the world's largest broadc ...<br></span></div>



{{Timeline of web browsers, 2020s

 <a class="link_plain"; href="/html/ALL/l/Firefox.html" ;"title="Firefox">Firefox</a>
<div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/History_of_free_and_open-source_software.html"  "title="History of free and open-source software">Firefox</a><span class="linkinfotext"> 






Mozilla Firefox, or simply Firefox, is a  free and open-source  web browser developed by the  Mozilla Foundation and its subsidiary, the  Mozilla Corporation. It uses the  Gecko rendering engine to display web pages, which implements current  ...<br></span></div>
<div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/History_of_web_browsers.html"  "title="History of web browsers">Firefox</a><span class="linkinfotext"> 






Mozilla Firefox, or simply Firefox, is a  free and open-source  web browser developed by the  Mozilla Foundation and its subsidiary, the  Mozilla Corporation. It uses the  Gecko rendering engine to display web pages, which implements current  ...<br></span></div>
<div class="linkinfo_desc"><a  class = "desc_only" href="/html/ALL/l/Software_version_histories.html"  "title="Software version histories">Firefox</a><span class="linkinfotext"> 






Mozilla Firefox, or simply Firefox, is a  free and open-source  web browser developed by the  Mozilla Foundation and its subsidiary, the  Mozilla Corporation. It uses the  Gecko rendering engine to display web pages, which implements current  ...<br></span></div>

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