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Firefox was created by Dave Hyatt and Blake Ross as an experimental branch of the Mozilla browser, first released as Firefox 1. Starting with version 5. This was gradually accelerated further in late , so that new major releases occur on four-week cycles starting in In April , 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 provides improved stability over the "Nightly" builds and is the first development milestone that has the "Firefox" logo. Gecko version numbering is the same as the Firefox build version number, starting with 5. The stated aim of this faster-paced process is to get new features to users faster. Firefox 5 was released on June 21, , [9] three months after the major release of Firefox 4. Firefox 5 is the first release in Mozilla's new rapid release plan, matching Google Chrome 's rapid release schedule and rapid version number increments. Firefox 6 was released on August 16, , introducing a permissions manager, new address bar highlighting the domain name is black while the rest of the URL is gray [12] , 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. Firefox 8 was released on November 8, [20] and prompts users about any previously installed add-ons. Upon installation, a dialog box prompted users to enable or disable the add-ons. Add-ons installed by third-party programs were disabled by default, but user-installed add-ons were enabled by default. Mozilla judged that third-party-installed add-ons were problematic, taking away user control, lagging behind on compatibility and security updates, slowing down Firefox startup and page loading time, and cluttering the interface with unused toolbars. It also features a large list of bug fixes. End-of-life 5. End-of-life 6. End-of-life 7. End-of-life 8. End-of-life 9. 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. 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 11 was released on March 13, Firefox 12 was released on April 24, Firefox 12 introduced few new features, but it made many changes and laid the ground work for future releases. Firefox 13 was released on June 5, Firefox 13 adds and updates several features, such as an updated new tab [55] and home tab page. The new tab page will display nine of the user's most visited websites, along with a cached image. Firefox 14 was released on June 26, for mobile devices only, just outside the regular release schedule of the web browser. Mozilla uses this information to improve the responsiveness of Firefox for future releases. Mozilla wants to reduce potential problems that could arise through the unwanted use of third-party applications malware , freezing, etc. Firefox 15 was released on August 28, with a " Responsive Design View " developer tool, [63] adds support for the Opus audio format , and adds preliminary native PDF support disabled by default. Firefox 15 introduced silent updates, an automatic update that will update Firefox to the latest version without notifying the user, [65] a feature that the web browsers Google Chrome and Internet Explorer 8 and above have already implemented, [66] [67] although the user was able to disable that function. There were improvements made to startup speed when a user wants to restore a previous session. Support for web apps was added. Opus audio format is now enabled by default. The roll-out of Firefox 16 revision End-of-life Official Firefox Mobile Official Firefox Desktop Firefox 17 is the first version of the browser that uses SpiderMonkey Firefox 18 was released on January 8, Firefox 19 was released on February 19, , featuring a built-in PDF viewer. Firefox 20 was released on April 2, , introduced a panel-based download manager, [] [] along with H. It also includes a new developer toolbox, that combines all developer tools into one panel. Firefox 21 was released on May 14, Firefox 22 was released on June 25, WebRTC is now enabled by default. Firefox 23 was released on August 6, 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 to software bugs in Firefox. The release includes support for the new scrollbar style in Mac OS X Firefox 25 was released on October 29, 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 Firefox 26 was released on December 10, Firefox 26 changed the behavior of Java plugins to "click-to-play" mode instead of automatically running them. It also added support for H. Firefox 27 was released on February 4, Firefox 28 was released on March 18, Firefox 29 was released on April 29, and includes the Australis interface, it also removes the add-on bar and moves its content to the navigation bar. Firefox 30 was released on June 10, It adds support for GStreamer 1. Off-cycle stability mobile update. Both versions added search field on the new tab page and were improved to block malware from downloaded files, along with other new features. Firefox Firefox 32 was released on September 2, Firefox 33 was released on October 14, It now has off-main-thread compositing OMTC enabled by default on Windows which brings responsiveness improvements , [] OpenH support, search suggestions on about:home and about:newtab, address bar search improvements, session restore reliability improvements, and other changes. Firefox 34 was released on December 1, It also disables SSLv3 , and enables the ability to recover from a locked Firefox process and to switch themes and personas directly in the customization mode. Firefox 35 was released on January 13, It brings support for a room-based conversations model to the Firefox Hello chat service, and other functions, it also includes security fixes. Firefox 37 was released on March 31, , bringing a heartbeat user rating system, which provides user feedback about the Firefox, and improved protection against website impersonation via OneCRL centralized certificate revocation. Desktop []. Android []. Off-cycle stability update. Official Firefox Both Firefox 38 and Firefox 38 ESR were released on May 12, , 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. Firefox 40 was released on August 11, for desktop and Android. On Windows 10 , the Australis theme was updated to reflect the overall appearance of Windows 10, and the interface is adapted for usability on touchscreens when used in the operating system's "Tablet mode". Firefox 40 includes additional security features, including the filtering of pages that offer potentially unwanted programs , 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. Firefox 41 was released on September 22, for desktop and Android. Among many additions are the ability to set a profile picture for a Firefox account, enhanced IME support using Text Services Framework , and instant messaging on Firefox Hello. Firefox 42 was released on November 3, for desktop and Android. Firefox 43 was released on December 15, for desktop and Android. Among many additions are the availability of the bit version for Windows 7 and above, a new strict blocklist, and audio indicators on Android. Firefox 44 was released on January 26, for desktop and Android. Among many additions are the improvement of warning pages for certificate errors and untrusted connections, enabling of H. Off-cycle security and stability update. 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. Firefox 46 was released on April 26, for both desktop and Android. Firefox 47 was released on June 7, for both desktop and Android. It is also the last Firefox version to support Android 2. Firefox 48 was released on August 2, 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 "Electrolysis" multi-process Firefox, meaning that the interface and web pages are running in separate processes in the computer was enabled. Firefox 49 was released on September 20, for both desktop and Android. Among the many additions were an updated Firefox Login Manager, improved video performance for users on systems that support SSE3 without hardware acceleration, added context menu controls to HTML5 audio and video that let users loop files or play files at 1. Firefox 50 was released on November 15, for both desktop and Android. Firefox 51 was released on January 24, for both desktop and Android. An important aspect of Firefox ESR Firefox 52 added support for WebAssembly 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 captive portal 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. Firefox 53 was released on April 19, for both desktop and Android. Starting with Firefox 53, Microsoft Windows support is exclusively for Windows 7 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 bit macOS and Linux support for processors older than Pentium 4 and AMD Opteron; new visual design for audio and video controls, support for WebM video with alpha compositing , 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. Firefox 54 was released on June 13, for both desktop and Android. Among the many additions are: simplifying the download button and download status panel , added support for multiple content processes, the ability to create and save custom devices in responsive web design mode desktop , improved audio and video playback in the browser, and improved bookmarks sync performance Android. Firefox 55 was released on August 8, for both desktop and Android. Among the many additions are: the launch of Windows support for WebVR , 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 Android Ice Cream Sandwich. Firefox 56 was released on September 28, 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 Android Jelly Bean and above. Another change was the introduction of the mozlz4 format, a proprietary variant of the lz4 compression format. 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, for desktop and Android with the name Firefox Quantum. Firefox 57 no longer supports legacy add-ons using XUL technologies. Firefox 58 was released on January 23, 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. Firefox 59 was released on March 13, 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. Firefox 57 "Quantum" []. Firefox 61 was released on June 26, 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. Firefox 62 was released on September 5, 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. Firefox 63 was released on October 23, 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 Amazon and Google 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. Firefox 64 version 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. 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. Firefox 65 was released on January 29, for both desktop and Android. Among the many additions and changes were: improved performance and web compatibility, with support for the WebP 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 and bit MSI installers for easier enterprise deployments; additional support for Flexbox desktop ; and the restoration of Chromecast controls to the location bar Android. Firefox 66 was released on March 19, 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 bit Windows and MacOS desktop , and the addition of support to open files from external storage, such as an SD card Android. Firefox 67 was released on May 21, for both desktop and Android. Among the many additions and changes were: Lowering priority of setTimeout during page load; suspending unused tabs; the ability to block known cryptominers and fingerprinters 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 to streamline user experience Android. Off-cycle security update. Firefox 69 was released on September 3, for desktop only. Firefox 70 was released on October 22, 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. Firefox 71 was released on December 3, 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. Firefox 72 was released on January 7, 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. Firefox 73 was released on February 11, for desktop only. Among the additions were: a page zoom feature for more than a decade that allows users to set the zoom level on a per-site basis, 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 Firefox 74 was released on March 10, 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 Microsoft Edge on Windows and Mac; use of Add-ons Manager to remove add-ons installed by external applications; Facebook Container, which prevents Facebook from tracking across the web; and support for mDNS ICE. However, out of concern for access to information during the concurrent pandemic , this change was rolled back. Firefox 75 was released on April 7, 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. Firefox 76 was released on May 5, 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. Firefox 77 was released on June 2, for desktop only. Additions included: pocket recommendations on Firefox' new tab for UK users; a new about:certificate page; and the removal of the browser. With the first stable release of Firefox Daylight Fenix , Firefox Firefox 79 was released on July 28, 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. Firefox 80 was released on August 25, 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. Firefox 81 was released on September 22, 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. Firefox 82 was released on October 20, 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. Firefox 83 was released on November 17, 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. Firefox 84 was released on December 15, for desktop and Android. Firefox 85 was released on January 26, 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 Adobe Flash support; and added support for the :focus-visible pseudo class desktop. Firefox 86 was released on February 23, 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. Firefox 87 was released on March 23, 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 , Adreno , Mali-T Android. Firefox 88 was released on April 19, 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 window. Firefox 89 was released on June 1, 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. Firefox 90 was released on July 13, for desktop and Android. Firefox 92 was released on September 7, for desktop and Android. Native bit builds are officially supported on Linux, macOS, and Windows since version Mozilla made Firefox for bit Linux a priority with the release of Firefox 4 , labeling it as tier 1 priority. The official releases of Firefox for macOS are universal builds that include both bit and 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 bit browser process and a bit plugin process, because some popular plugins still are bit. The bit and bit versions of Windows can be used to run bit Firefox. From Wikipedia, the free encyclopedia. Wikimedia list article. This box: view talk edit. Current supported official releases Firefox Current supported test releases Firefox Future official releases Rapid Firefox Future test releases Firefox Main article: Firefox early version history. Logo used from Firefox 23 to Firefox Logo used from Firefox 57 to Firefox Logo used from Firefox Old version. Older version, still maintained. Latest version. Latest preview version. Future release. Free and open-source software portal. Official Firefox 5. The Do-Not-Track header preference has been moved to increase discoverability. Tuned HTTP idle connection logic for increased performance. Improved canvas, JavaScript, memory, and networking performance. Improved spell checking for some locales. Improved desktop environment integration for Linux users. WebGL content can no longer load cross-domain textures. Background tabs have setTimeout and setInterval clamped to ms to improve performance. Off-cycle stability update for Mac OS X only. Fixed an issue in Mac OS X Official Firefox 6. The user can choose what information can be shared with sites, e. The address bar now highlights the domain of the website you're visiting. Streamlined the look of the site identity block. Added support for window. Added Scratchpad, an interactive JavaScript prototyping environment. Added a new Web Developer menu item and moved development-related items into it. Improved usability of the Web Console. Improved the discoverability of Firefox Sync. Reduced browser startup time when using Panorama. Fixed several stability and security issues. Last release for Android 2. Official Firefox 7. Added a new rendering backend to speed up Canvas operations on Windows systems. Bookmark and password changes now sync almost instantly when using Firefox Sync. Added support for text-overflow: ellipsis. Added support for the Web Timing specification. Enhanced support for MathML. The WebSocket protocol has been updated from version 7 to version 8. Added an opt-in system for users to send performance data back to Mozilla to improve future versions of Firefox. Fixed several security and stability issues. Last release for Maemo. Official Firefox 8. Added a one-time add-on selection dialog to manage previously installed add-ons. Added Twitter to the search bar. Added a preference to load tabs on demand, improving startup time when windows are restored. Added support for HTML5 context menus. Improved CSS hyphen support for many languages. Improved WebSocket support. Changes during betas Removed support for new tab animation due to incompatibilities with some extensions. Fixed Windows startup crash caused by RoboForm versions older than 7. Official Firefox 9. Added support for the font-stretch CSS property. Improved support for the text-overflow CSS property. Anti-Aliasing for WebGL is now implemented. CSS3 3D-Transforms are now supported. Full Screen APIs allow you to build a web application that runs full screen. Regular security and stability update. Fixed extensions. Addressed a fix that allows specifying wildcard that matches all simple netbiosnames in network. Regular security update. SPDY protocol support disabled by default. Page Inspector Tilt 3D View. Sync Add-ons. Redesigned HTML5 video controls. Style Editor CSS. Last release for Windows Page Source now has line numbers. Line breaks are now supported in the title attribute. Improvements to "Find in Page" to center search result. URLs pasted into the download manager window are now automatically downloaded. Support for the text-align-last CSS property has been added. Some TinyMCE-based editors failed to load. The default home page now has quicker access to bookmarks, history, settings, and more. SPDY protocol now enabled by default for faster browsing on supported sites. Restored background tabs are not loaded by default for faster startup. Smooth scrolling is now enabled by default. The column-fill CSS property has been implemented. Support for the CSS3 background-position property extended syntax has been added. The :invalid pseudo-class can now be applied to the element. The CSS turn angle unit is now supported. Fixed the Hebrew text that was sometimes rendered incorrectly. Fixed an issue in Adobe Flash Android Official Firefox Mobile Plugins can now be configured to only load on click about:config. The Awesome Bar now auto-completes typed URLs, a new feature that will suggest a website that user frequently visits for a faster browsing. Pointer Lock API implemented. New API to prevent your display from sleeping. Long URLs now extend the status bar almost to the whole width of the viewport. GStreamer support is not enabled in the official builds, but can be enabled at compile time. Desktop Official Firefox Desktop Support for SPDY networking protocol v3. WebGL enhancements, including compressed textures for better performance. Localization in Maithili. Optimized memory usage for add-ons. JavaScript debugger integrated into developer tools. New layout view added to Inspector. High precision event timer implemented. The CSS word-break property has been implemented. New responsive design tool allows web developers to switch between desktop and mobile views of sites. Native support for the Opus audio format added. The source element now supports the media attribute. Fixed the focus rings that keep growing when repeatedly tabbing through elements. Acholi and Kazakh localizations added. Improvements around JavaScript responsiveness through incremental garbage collection. New Developer Toolbar with buttons for quick access to tools, error count for the Web Console, and a new command line for quick keyboard access. Recently opened files list in Scratchpad implemented. Fixed an issue where debugger breakpoints do not catch on page reload. No longer supporting MD5 as a hash algorithm in digital signatures. Opus support by default. Reverse animation direction has been implemented. Per tab reporting in about:memory. User Agent strings for pre-release Firefox versions now show only major version. Click-to-play blocklisting implemented to prevent vulnerable plugin versions from running without the user's permission. Updated Awesome Bar experience with larger icons. Mac OS X JavaScript Maps and Sets are now iterable. Sandbox attribute for iframes implemented, enabling increased security. Over twenty performance improvements, including fixes around the New Tab page. Fixed pointer lock that doesn't work in web apps. Fixed page scrolling on sites with fixed headers. Fixed font rendering issue. Regular security and stability updates. Fixed improvements to the Click-to-Play vulnerable plugin blocklisting feature. Support for Retina displays on OS X Preliminary support for WebRTC. Performance improvements around tab switching. Support for new DOM property window. Improvement in startup time through smart handling of signed extension certificates. Support for W3C touch events implemented, taking the place of MozTouch events. Improved responsiveness for users on proxies. Changes during Aurora releases Adds a Metro user interface on Windows 8. Fixed unity player crashes on Mac OS X. Canvas elements can export their content as an image blob using canvas. Startup performance improvements. Debugger now supports pausing on exceptions and hiding non-enumerable properties. There is now a Browser Debugger available for add-on and browser developers experimental, set devtools. CSS page is now supported. CSS viewport-percentage length units implemented vh, vw, vmin and vmax. CSS text-transform now supports full-width. Fixed certain valid WebGL drawing operations that were incorrectly rejected, leaving incomplete rendering in affected pages. Fixed an issue that starting Firefox with -private flag incorrectly claims you are not in Private Browsing mode. Fixed plugins that stop rendering when the top half of the plugin is scrolled off the top of the page, in HiDPI mode. New download experience. Ability to close hanging plugins, without the browser hanging. Continued performance improvements around common browser tasks page loads, downloads, shutdown, etc. New JavaScript Profiler tool. Fixed: Details button on Crash Reporter. Preliminary implementation of Firefox Health Report. Firefox will suggest how to improve your application startup time if needed. Ability to Restore removed thumbnails on New tab Page. CSS -moz-user-select:none selection changed to improve compatibility with -webkit-user-select:none. Graphics related performance improvements. Removed E4X support from SpiderMonkey. Implemented Remote Profiling. Implemented scoped stylesheets. Fixed: Some function keys may not work when pressed. Fixed: Browsing and Download history clearing needs unification to avoid confusion on clearing download history. Windows: Firefox now follows display scaling options to render text larger on high-res displays. Social services management implemented in Add-ons Manager. Improved WebGL rendering performance through asynchronous canvas updates. Plain text files displayed within Firefox will now word-wrap. For user security, the Components object is no longer accessible from web content. Improved memory usage and display time when rendering images. Pointer Lock API can now be used outside of fullscreen. CSS3 Flexbox implemented and enabled by default. New built-in font inspector. Mixed content blocking enabled to protects users from man-in-the-middle attacks and eavesdroppers on HTTPS pages. Options panel created for Web Developer Toolbox. Improved about:memory's functional UI. Simplified interface for notifications of plugin installation. Users can now switch to a new search provider across the entire browser. CSP policies using the standard syntax and semantics will now be enforced. Replaced fixed-ratio audio resampler in webrtc. Write more accessible pages on touch interfaces with new ARIA role for key buttons. Social share functionality. Added unprefixed requestAnimationFrame. Implemented a global browser console. New feature in toolbox: Network Monitor. Implemented Close tabs to the right. Social: Ability to tear-off chat windows to view separately by simply dragging them out. Accessibility related improvements on using pinned tabs. Removed support for Revocation Lists feature. Performance improvements on New Tab Page loads. Major SVG rendering improvements around Image tiling and scaling. Improved and unified Browser console for enhanced debugging experience, replacing existing Error console. Removed support for sherlock files that are loaded from application or profile directory. Updated Mozilla to NSS 3. Fixed an issue where some UI strings in Firefox The find bar is no longer shared between tabs. If away from Firefox for months, you now will be offered the option to migrate another browser's history and settings. Resetting Firefox no longer clears your browsing session. CSS3 background-attachment:local support to control background scrolling. Many new ES6 functions implemented. Fixed blank or missing page thumbnails when opening a new tab. Password manager now supports script-generated password fields. Updates can now be performed by Windows users without write permissions to Firefox install directory requires Mozilla Maintenance Service. Support for H. CSP implementation now supports multiple policies, including the case of both an enforced and Report-Only policy, per the specification. ToFloat32 takes a JavaScript value and converts it to a Float32, whenever possible. There is no longer a prompt when websites use appcache. Support for the CSS image orientation property. IndexedDB can now be used as a "optimistic" storage area so it doesn't require any prompts and data is stored in a pool with LRU eviction policy, in short temporary storage. Improved page load times due to no longer decoding images that are not visible. Off-cycle stability mobile release. Fixed: About:home is missing translations in some locales. Fixed: In some cases, the clip set on the page doesn't update when the addressbar hides. Fixed: Invalid position:fixed rendering. Enabled TLS 1. Added support for SPDY 3. Ability to reset style sheets using all:unset. You can now choose to deobfuscate javascript in the debugger. Added support for scrolled fieldsets. Implemented allow-popups directive for iframe sandbox, enabling increased security. CSS cursor keywords -moz-grab and -moz-grabbing have been unprefixed. Added support for ES6 generators in SpiderMonkey. Implemented support for mathematical function Math. Dashed line support on Canvas. Off-cycle stability release. Fixed: JavaScript math correctness issue. Support for Opus in WebM. Support for MathML 2. Background thread hang reporting. Support for multi-line flexbox in layout. Android Off-cycle stability mobile update. Fixed mobile-only security fix for file:paths. A new menu sits in the right hand corner of Firefox and includes popular browser controls. New tabs provide an overall smoother look and fade into the background when not active. An interactive onboarding tour to guide users through the new Firefox changes. Added the ability to set up Firefox Sync by creating a Firefox account. Gamepad API finalized and enabled. Malay [ma] locale added. Clicking on a W3C Web Notification will switch to the originating tab. Console object available in web workers. Promises enabled by default. SharedWorker enabled by default. Add-on bar has been removed, content moved to navigation bar. No longer possible to move tabs from the top of the browser without an add-on. Fixed: Tabs not visible with dark themes under Windows 8. Fixed: Session Restore failed with a corrupted sessionstore. Fixed: Seer disabled by default. Mac OS X command-E sets find term to selected text. Support for GStreamer 1. Disallowed calling WebIDL constructors as functions on the web. With the exception of those bundled inside an extension or ones that are whitelisted, plugins will no longer be activated by default. Fixes to box-shadow and other visual overflow. Mute and volume available per window when using WebAudio. Background-blend-mode enabled by default. ES6 array and generator comprehensions implemented. Error stack now contains column number. Support for alpha option in canvas context options. Fixed TypedArrays that don't support new named properties. Blocks malware from downloaded files. Support of Prefer:Safe http header for parental control. Upper Sorbian [hsb] locale added. Removal of the CAPS infrastructure for specifying site-specific permissions via capability. Most notably, attempts to use this functionality to grant access to the clipboard will no longer work. WebVTT implemented and enabled. CSS3 variables implemented. Developer Tools: Add-on Debugger. Developer Tools: Canvas Debugger. New Array built-in: Array. New Object built-in: Object. CSP 1. Developer Tools: Eyedropper tool added to the color picker. Developer Tools: Editable Box Model. Developer Tools: Code Editor improvements. Developer Tools: Console stack traces. Developer Tools: Styled console logs. Dialogs spawned from the onbeforeunload event no longer block access to the rest of the browser. Fixed: Search for partially selected link text from context menu. Fixed: Intermittent failures in add-ons manager mochitest-browser tests. Fixed: Error building nsChildView. Last release for Android for ARMv6 devices. Integration of generational garbage collection. Public key pinning support enabled. Displays the number of found items in the find toolbar. Easier back, forward, reload, and bookmarking through the context menu. Views historical use information for logins stored in password manager. Lower Sorbian [dsb] locale added. Removed and turned off trust bit for some bit root certificates. Performance improvements to Password Manager and Add-on Manager. CSS position:sticky enabled by default. CSS box-decoration-break replaces -moz-background-inline-policy. Inspector button moved to the top left. Hidden nodes displayed differently in the markup-view. New Web Audio Editor. Code completion and inline documentation added to Scratchpad. Fixed mixed content icon that may be incorrectly displayed instead of lock icon for SSL sites. Android [] Fixed link tap selection that was offset on some Android devices. Desktop Off-cycle stability update. OpenH support sandboxed. Improved search experience through the location bar. Slimmer and faster JavaScript strings. Search suggestions on the Firefox Start about:home and new tab about:newtab pages. Improved reliability of the session restoration. Azerbaijani [az] locale added. Proprietary window. DOMMatrix interface implemented. Cubic-bezier curves editor. Displayed which elements have listeners attached. New sidebar which displays a list of shortcuts to every media rule in the current stylesheet. Paint flashing for browser content repaints. Editable keyframes rules in the Rules section of the Inspector. CSS transform highlighter in the style-inspector. Fixed incomplete downloads being marked as complete by detecting broken HTTP1. Fixed two startup crashes with some combination of hardware and drivers. Firefox's year anniversary. Enhanced tiles. Privacy tour introduced. Adding DuckDuckGo as a search option. Improved search bar en-US only. Firefox Hello real-time communication client. Recover from a locked Firefox process in the "Firefox is already running" dialog on Windows. Disabled SSLv3. Firefox signed by Apple OS X version 2 signature. JavaScript Template Strings Implemented. CSS3 Font variants and features control e. Highlight all nodes that match a given selector in the Style Editor and the Inspector's Rules panel. Improved User Interface of the Profiler. Fixed: CSS transitions start correctly when started at the same time as changes to display, position, overflow, and similar properties. Desktop Official Firefox New search UI improved and enabled for more locales. Access the Firefox Marketplace from the Tools menu and optional toolbar button. Use of tiled rendering on Mac OS X. Improved high quality image resizing performance. Improved handling of dynamic styling changes to increase responsiveness. Resource Timing API implemented. CSS filters enabled by default. Changed JavaScript 'let' semantics to match the ES6 specification. Support for inspecting ::before and ::after pseudo elements. Computed view: Nodes matching the hovered selector are now highlighted. Reduced resource usage for scaled images. Fixed a potential startup crash. Fixed Kerberos authentication failure with alias. Fixed a crash on Godaddy webmail. Fixed an update failure of document. CSP had a change in behavior with regard to case sensitivity resources loading. Locale added: Uzbek UZ. Remote option removed. No longer accepting insecure RC4 ciphers whenever possible. Shut down hangs will now show the crash reporter before exiting the program. Add-on compatibility changed. Unicode-range CSS descriptor implemented. CSSOM-View scroll behavior implemented allowing smooth scrolling of content without custom libraries. Object-fit and object-position implemented. Isolation CSS property implemented. CSS3 will-change property implemented. Changed JavaScript 'const' semantics to conform better to the ES6 specification. Improved ES6 generators for better performance. Eval sources now appear in the Debugger. DOM Promises inspection. Inspector: More paste options in markup view. CSS gradients work on premultiplied colors. Fixed some unexpected logout from Facebook or Google after restart. Fixed a startup crash with EMET. Fixed the Hello contact that may become inactive until restart. Fixed print preferences that may not be preserved. Fixed Hello contact tabs that may not be visible. Fixed the WebGL that may use significant memory with Canvas2d. Option -remote has been restored. Fixed a top crash. Fixed some potential crashes with Flash videos. Yandex set as default search provider for the Turkish locale. Improved protection against site impersonation via OneCRL centralized certificate revocation. Disabled insecure TLS version fallback for site security. Extended SSL error reporting for reporting non-certificate errors. Improved performance of WebGL rendering on Windows. Added support for CSS display:contents. IndexedDB now accessible from worker threads. New Inspector animations panel to control element animations. New Security Panel included in Network Panel. Added logging of weak ciphers to the web console. Off-cycle stability and security update. Desktop Fixed start-up crash due to graphics hardware and third-party software. Fixed stability issues for some graphics hardware and feature sets. Security fixes. Android Fixed an issue related to the "request desktop site" feature. Ruby annotation support. Base for the next ESR release. Improved page load times via speculative connection warmup. WebSocket now available in web workers. BroadcastChannel API implemented. Optimized-out variables are now visible in Debugger UI. XMLHttpRequest logs in the web console are now visually labelled and can be filtered separately from regular network requests. WebRTC now has multistream and renegotiation support. Fixed a problem in which users who import cookies from Google Chrome can end up with broken websites. Fixed a problem that large animated images may fail to play and may stop other images from loading. Android Fixed a crash on start-up on devices for which Firefox does not support Android hardware acceleration. Implementation of Reader View. Share the active tab or window in a Hello conversation. Fixed a problem that would cause Firefox to stop painting when switching tabs. Fixed graphics performance when using the built-in VGA driver on Windows 7. Fixed various stability fixes. Desktop Off-cycle update. Fixes bugs in Firefox Note: This release is only available from the Mozilla archives. Fixed: Firefox may crash during mp4 video playback. Fixed branded Firefox application that does not open URLs in system default browser. Fixed significant memory leak with GreaseMonkey add-on. Fixed ESRs that would not build on hppa platform. Off-cycle graphite2 library update. Disabled Graphite font shaping library. Support for 'switch' role in ARIA 1. Support for new Unicode 8. Removed support for insecure SSLv3 for network communications. Disable use of RC4 except for temporarily whitelisted hosts. The malware detection service for downloads now covers common Mac file types. Performance of displaying dashed lines is improved on Mac OS X. List-style-type now accepts a string value. Enable the Fetch API for network requests from dedicated, shared and service workers. Cascading of CSS transitions and animations now matches the current spec. Drag and drop enabled for nodes in Inspector markup view. Webconsole input history persists even after closing the toolbox. Cubic bezier tooltip now shows a gallery of timing-function presets for use with CSS animations. Improve performance for IPv6 fallback to IPv4. Fixed the security state indicator on a page now correctly ignores loads caused by previous pages. Fixed an issue where a Hello conversation window would sometimes fail to open. Fixed a regression that could lead to Flash not displaying has been fixed. Update to NSS 3. Added protection against unwanted software downloads. User can receive suggested tiles in the new tab page based on categories Firefox matches to browsing history en-US only. Hello allows adding a link to conversations to provide context on what the conversation will be about. New style for add-on manager based on the in-content preferences style. Improved scrolling, graphics, and video playback performance with off-main-thread compositing Linux only. Graphic blocklist mechanism improved: Firefox version ranges can be specified, limiting the number of devices blocked. Add-on extensions that are not signed by Mozilla will display a warning. Smoother animation and scrolling with hardware vsync Windows only. JPEG images use less memory when scaled and can be painted faster. Sub-resources can no longer request HTTP authentication, thus protecting users from inadvertently disclosing login data. IndexedDB transactions are now non-durable by default. Implemented AudioBufferSourceNode. New page ruler highlighting tool that displays lightweight horizontal and vertical rules on a page. Inspector now searches across all content frames in a page. Fixed Kannada text that does not display properly in built-in pdf viewer. Fixed mozalloc. Fixed a startup crash with some combination of hardware and drivers. Fixed a segmentation fault in the GStreamer support Linux only. Fixed a startup crash when using DisplayLink Windows only. Fixed an issue that the selection in a select combox box using the mouse could be broken on some sites. Fixed an issue that some search partner codes were missing. Ability to set a profile picture for your Firefox Account. Firefox Hello now includes instant messaging. SVG images can be used as favicons. Improved box-shadow rendering performance. WebRTC now requires perfect forward secrecy. WARP is disabled on Windows 7. Updates to image decoding process. Support for running animations of 'transform' and 'opacity' on the compositor thread. Added support for the transform-origin property on SVG elements. Network requests can be exported in HAR format. Screenshots a node or element from markup view with the Screenshot Node context menu item. Pseudo-Class panel in the Inspector. Fixed potential hangs with Flash plugins. Fixed a regression in the bookmark creation. Fixed a startup crash with some Intel Media Accelerator graphic cards. Fixed a graphic crash, occurring occasionally on Facebook. Control Center that contains site security and privacy controls. Indicator added to tabs that play audio with one-click muting. Improved ability for applications to monitor and control which devices are used in getUserMedia. Login Manager improvements: Improved heuristics to save usernames and passwords. Improved performance on interactive websites that trigger a lot of restyles. Implemented ES6 Reflect. Support for ImageBitmap and createImageBitmap. Viewing HTML source in a tab. Asynchronous call stacks now allow web developers to follow the code flow through setTimeout, DOM event handlers, and Promise handlers. CSS filter presets in the Inspector. Improved API support for m4v video playback. Firefox bit for Windows is now available via the Firefox download page. Users can choose search suggestions from the Awesome Bar. On-screen keyboard displayed on selecting input field on devices running Windows 8 or greater. Firefox Health Report has switched to use the same data collection mechanism as telemetry. Markup view shows indicators for pseudo-classes locked for elements. Binding F1 key to open the settings when the toolbox is focused. New 'Use in Console' context menu item in Inspector to store selected element in a temporary variable. Search button next to overridden CSS properties to find similar properties in the rules view. Ability to filter styles from their property names in the rules view. Stack traces are now shown for exceptions inside the console. Added ability to display server-side logs in the console. Ability to choose resolution for the GCLI screenshot command. Subresource integrity allows developers to make their sites more secure. Network requests in Console now link to Network panel instead of opening in a popup. Unprefixed 'hyphens' property is now supported. The 'transform-origin' property is now supported on SVG elements. Animation inspector now displays animations in a timeline. Fixed an issue in which the Eyedropper tool does not work as expected when page is zoomed. Various security fixes. Desktop Off-cycle security and stability update. Improved the decoding of some videos on YouTube on some Windows configurations. Multi-user Linux download folders can be created. Re-enabled SHA-1 certificates. The last version to support HTTP cookie prompts. Enabled H. In the animation-inspector timeline, lightning bolt icon next to animations running on the compositor thread. Screenshot commands allow user choice of pixel ratio in Developer Tools. Fixed an issue where Windows XP and Vista screensaver doesn't disable when watching videos. To support unicode-range descriptor for webfonts, font matching under Linux now uses the same font matching code as other platforms. Use of a SHA signing certificate for Windows builds, to meet new signing requirements. Firefox has removed support for the RC4 decipher. Stricter validation of web fonts. On-screen keyboard support temporarily turned off for Windows 8 and Windows 8. Right-clicking on a logged object in the console to store it as a global variable on the page. Visual tools for Animation:. Visually modify the cubic-bezier curve that drives the way animations progress through time. Discover and scrub through all CSS animations and transitions playing on the page. Visual tools for Layout and Styles: Display rulers along the viewport to verify size and position and use the measurement tool to easily detect spacing and alignment problems. Use CSS filters to preview and create real-time effects like drop-shadows, sepia, etc.. New memory tool for inspecting the memory heap. Service Workers API. Built-in JSON reader to intuitively view, search, copy and save data without extensions. A jump to function definitions in the debugger with Cmd-Click. The rule view now displays styles using their authored text, and edits in the rule view are now linked to the style editor. Changes during Nightly releases This and newer versions erase the cookie permissions database of any previous Firefox version. Allows spaces in cookie names. Requires NSS 3. Fixed a crash in cache networking. Fix for using WebSockets in service worker controlled pages. Shipment for the Gecko SDK. Fix for graphics startup crash on Linux. Tabs synced via Firefox Accounts from other devices are now shown in dropdown area of Awesome Bar when searching. Synced Tabs button in button bar. Introduces a new preference network. Guarani [gn] locale added. Tab Groups Panorama feature removed. Ability to filter snapshot output in memory tool. Fine-tuning animations by changing the playback rate of animations in the animation-inspector's timeline. DOMContentLoaded and load events shown in the network monitor timeline. Added Negative url filtering for the network monitor. Support for diffing heap snapshots added to the memory tool. Inspector search now matches results from all content in the page, including subframes. List of animated properties and keyframes is now displayed when clicking on an animation in the animation-inspector's timeline. Web Speech synthesis API. ES6 Classes. Fix for a regression causing search engine settings to be lost in some context. Fix for an issue which could cause the list of search provider to be empty. Fix for a regression when using the location bar. Fix for some loading issues when Accept third-party cookies : was set to Never. Fix for a web compatibility regression impacting the srcset attribute of the image tag. Fix for a crash impacting the video playback with Media Source Extension. Fix for a regression impacting some specific uploads. Desktop Fix for a regression with the copy and paste with some old versions of some Gecko applications like Thunderbird. Android Last release for Android 3. Fixed add-on signing certificate expiration. Fixed a graphics-related shutdown crash. Fixed service worker update issue. Fixed a build issue when jit is disabled. Fixed a page loading issue related to antivirus software. Searched a plugin issue for various locales. Limited Sync registration updates. Add-ons relying on it will stop working. The browser. The Firefox click-to-activate plugin whitelist has been removed. Detect Websense to protect users from a startup crash. We've got your back. Process separation e10s is enabled for some of you. Like it? Let us know and we'll roll it out to more. Add-ons that have not been verified and signed by Mozilla will not load. Linux fans: Get better Canvas performance with speedy Skia support. Try saying that three times fast. Full duplex for Linux enabled. Searching for something already in your bookmarks or open tabs? We added super smart icons to let you know. The media parser has been redeveloped using the Rust programming language. Fixed WebRTC bugs causing frequency distortions. Improved step debugging on last line of functions. WebExtensions support is now considered as stable. Now you can with our geometry editor. The memory tool now has a tree map view for your debugging pleasure. We're putting the spotlight on the background. Now you can debug WebExtensions background content scripts and background pages. Old and busted: Error Console. New hotness: Browser Console for your debugging pleasure. Add-on development just got easier because you can reload them from about:debugging — because we're all about debugging. This theme is hot, hot, hot! Say hi to the Firebug theme for Developer Tools. Expanded network requests from the console panel to view request details in line, so you can see things in context. Fix for a top crash in the JavaScript engine. Fix for a startup crash issue caused by Websense. Fix for a top crash caused by plugin issues. Fix for an unsigned add-ons issue on Windows. Fix for a shutdown issue. Fix for a crash in WebRTC. Last release for Mac OS X It's one more way Firefox is supporting Let's Encrypt and helping users transition to a more secure web. Added features to Reader Mode that make it easier on the eyes and the ears. Controls that allow users to adjust the width and line spacing of text. Narrate, which reads the content of a page out loud. Improved video performance for users on systems that support SSSE3 without hardware acceleration. Added context menu controls to HTML5 audio and video that let users loops files or play files at 1. Improved performance on OS X systems without hardware acceleration. Improved appearance of anti-aliased OS X fonts. Improvements in about:memory reports for tracking font memory usage. Improved performance on Windows systems without hardware acceleration. Fixed an issue that prevented users from updating Firefox for Mac unless they originally installed Firefox. Now, those users as well as any user with administrative credentials can update Firefox. Removed Firefox Hello. Re-enabled the default for Graphite2 font shaping. Added a Cause column to the Network Monitor to show what caused each network request. Introduced web speech synthesis API. This should improve performance and reduce crashes for sites that use the Flash plugin. Changed D3D9 default fallback preference to prevent graphical artifacts. Fixed a network issue that prevents some users from seeing the Firefox UI on startup. Fixed a web compatibility issue with Array. Diagnostic information on timing for tab switching. Added download protection for a large number of executable file types on Windows, Mac and Linux. Increased availability of WebGL to more than 98 percent of users on Windows 7 and newer. Added Guarani gn locale. Added option to Find in page that allows users to limit search to whole words only. Updates to keyboard shortcuts. Blocked versions of libavcodec older than Added a built-in Emoji set for operating systems without native Emoji fonts Windows 8. Changes for web developers. Android Added support for HLS videos via player overlay. Simplified the user interface by combining the Recent Tabs and History panels. Improved reliability of browser data sync. An even faster E10s! Tab Switching is better! Added Georgian ka and Kabyle kab locales. A warning is displayed when a login page does not have a secure connection. Added support for WebGL 2, with advanced graphics rendering features like transform feedback, improved texturing capabilities, and a new sophisticated shading language. Firefox will save passwords even in forms that do not have "submit" events. Added a zoom button in the URL bar: Displays percent above or below percent when a user has changed the page zoom setting from the default. Lets users return to the default setting by clicking on the button. Users can view passwords in the save password prompt before saving them. Removed Belarusian be locale. Updated to NSS 3. Re-enabled E10s support for Russian ru locale. Use of 2D graphics library Skia for content rendering on Linux. Fixed an issue in which geolocation was not working on Windows. Android Off-cycle stability update. Added support for WebAssembly, an emerging standard that brings near-native performance to Web-based games, apps, and software libraries without the use of plugins. Added automatic captive portal detection, for easier access to Wi-Fi hotspots. When accessing the Internet via a captive portal, Firefox will alert users and open the portal login page in a new tab. Firefox now displays a "This connection is not secure" message when users click into the username and password fields on pages that don't use HTTPS. Implemented the Strict Secure Cookies specification which forbids insecure HTTP sites from setting cookies with the "secure" attribute. In some cases, this will prevent an insecure site from setting a cookie with the same name as an existing "secure" cookie from the same base domain. Enhanced Sync to allow users to send and open tabs from one device to another. Improved text input for third-party keyboard layouts on Windows. This will address some keyboard layouts that: have chained dead keys. Silverlight, Java, Acrobat and the like are no longer supported. Improved experience for downloads: Notification in the toolbar when a download fails. Quick access to five most recent downloads rather than three. Larger buttons for canceling and restarting downloads. Displaying but allowing users to override an "Untrusted Connection" error when encountering SHA-1 certificates that chain up to a root certificate included in Mozilla's CA Certificate Program. Note: Firefox continues to permit SHA-1 certificates that chain to manually imported root certificates. When not using Direct2D on Windows, Skia is used for content rendering. Redesigned Responsive Design Mode to include device selection, network throttling, and more. Improved security for screen sharing, which now shows a preview and no longer requires a whitelisted domain. Display of media controls to pause or resume playback on the Android notification bar. This gives users easy access to controls and allows them to see when audio or video is playing and consuming mobile data on Firefox. Fix for loading tab icons on session restore. Fix for a crash on startup on Linux. Fix for new installs erroneously not prompting to change the default browser setting. Android Disabled presentation API to avoid page loading delays. Display of end-of-life message on non-NEON devices. Last release for bit Mac OS X. Two new 'compact' themes available in Firefox, dark and light, based on the Firefox Developer Edition theme. Lightweight themes are now applied in private browsing windows. Reader Mode now displays estimated reading time for the page. Updated the design of site permission requests to make them harder to miss and easier to understand. Windows XP and Vista are no longer supported. The last few characters of shortened tab titles fade out instead of being replaced by ellipses to keep more of the title visible. Support for WebM video with alpha, which allows playing videos with transparent backgrounds. Long press on a search suggestion removes it from browser history. Fix for accessibility issue with TalkBack. Fix for a crash with the Bluhell Firewall add-on. The non-standard showDialog argument to window. Right-to-left locales will now display the search bar correctly. Prevented video corruption on affected devices. Desktop Made form validation errors and date picker panel visible to the user Android Fix for issues with Android integration. Fixed excessive resource usage from the captive portal detection service. Bumped preloaded security information expiration times. Added support for multiple content processes e10s-multi. Added Burmese my locale. Moved the mobile bookmarks folder to the main bookmarks menu for easier access. Added ability to create and save custom devices in Responsive Design Mode. Additional changes for web developers. Android Added Bulgarian bg and Kabyle kab locales. Fixed formatting for right-to-left languages, including formatting of preference names in about:config. Improved audio and video playback in the browser. Improved bookmarks sync performance. Firefox Developer Edition will be based on the "Beta" build afterwards. Fix for a display issue of opening new tab. Fix for a display issue when opening multiple tabs. Fix for a tab display issue when downloading files. Desktop Fix for a PDF printing issue. Fix for a Netflix issue on Linux. Android Fix for an inconsistent locale display issue Fix for a crash in tabs tray menu Fix for issues with navigation End-of-life Added options that let users optimize recent performance improvements Setting to enable Hardware VP9 acceleration on Windows 10 Anniversary Update for better battery life and lower CPU usage while watching videos Setting to modify the number of concurrent content processes for faster page loading and more responsive tab switching Simplified installation process with a streamlined Windows stub installer Firefox for Windows bit is now installed by default on bit systems with at least 2GB of RAM Full installers with advanced installation options are still available Improved address bar functionality Search with any installed one-click search engine directly from the address bar Search suggestions appear by default When entering a hostname like pinterest. Added Belarusian be locale Various security fixes Modernized application update UI to be less intrusive and more aligned with the rest of the browser. Only users who have not restarted their browser 8 days after downloading an update or users who opted out of automatic updates will see this change. This change will not be visible to all users immediately. Firefox does not support downgrades, even though this may have worked in past versions. You can now reorder tabs by tapping and holding a tab in the tabs tray or in the tab strip on tablets. Added Greek el and Lao lo locales Various security fixes Added option to accessibility settings to respect the system's set font size when displaying web pages Video that is not visible will stop rendering to conserve power audio will still continue Note: Firefox 55 is the last version that supports devices running Android 4. Fix for a problem causing What's new pages not to be displayed. Fix for a regression in the tab restoration process. Disabled the predictor prefetch. Fix for an issue with new installation notification for sideload add-ons. Fix for performance regressions with WebExtension. Fix for a regression with the popup menu. Users of bit Firefox on bit Windows are migrated to bit Firefox for increased stability and security. Fix for video-related crashes on Windows 7. Fix for shutdown crash. New installs will see this unified bar A revamped new tab page that includes top visited sites, recently visited pages, and recommendations from Pocket in the US, Canada, and Germany An updated product tour to orient new and returning Firefox users AMD VP9 hardware video decoder support for improved video playback with lower power consumption An expanded section in preferences to manage all website permissions Various security fixes Firefox now exclusively supports extensions built using the WebExtension API, and unsupported legacy extensions will no longer work The browser's autoscroll feature, as well as scrolling by keyboard input and touch-dragging of scrollbars, now use asynchronous scrolling. These scrolling methods are now similar to other input methods like mousewheel, and provide a smoother scrolling experience The content process now has a stricter security sandbox that blocks filesystem reading and writing on Linux, similar to the protections for Windows and macOS that shipped in Firefox 56 Middle mouse paste in the content area no longer navigates to URLs by default on Unix systems Removed the toolbar Share button Some older versions of the ATOK IME, including ATOK , , and , can cause crashes and are therefore disabled on the Windows bit version of Firefox Quantum The default font for Japanese text is now Meiryo A complete visual refresh of both the Light and Dark DevTools themes, matching the new visual style of Firefox Quantum The Inspector shows the values of CSS variables on hover Completely new and re-designed Console panel. Joining the Debugger and the Network Monitor, the Console has been rewritten using modern web technologies such as React and Redux. It now also allows to inspect objects in context. Android Performance improvements for faster page loading and stability Updated interface, including a revamped new tab page that includes top visited sites, recently visited pages, and recommendations from Pocket in the US, Canada and Germany Video decoding is shut down when the tab playing the media is sent to the background. Video resumes when the tab is brought to the foreground. Audio will not be affected Added an option to enable tracking protection outside of private browsing Automatically enabled private mode on compatible keyboards during private browsing Long URLs in the URL bar are now scrollable Added Wolof wo locale Firefox for Android now exclusively supports extensions built using the WebExtension API, and unsupported legacy extensions will no longer work Android Apps can now launch Firefox Custom Tabs. Fix for an issue with prefs. Blocked injection of a client library associated with the RealPlayer Free player which is known to cause performance problems in Firefox. Android Fixed an issue in which Stop button no longer appears immediately after starting a navigation. Fonts installed in non-standard directories will no longer appear blank for Linux users Various security fixes User profiles created in Firefox 58 and in future releases are not supported in previous versions of Firefox. Users who downgrade to a previous version should create a new profile for that version. Added 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 Implemented the PerformanceNavigationTiming API Added PerformanceResourceTiming. Setting available via Sync Preferences. Fixed an issue in which, when using certain non-default security policies on Windows for example with Windows Defender Exploit Protection or Webroot security products , Firefox Android Fixed performance issue whereby some installations were initially slow to load pages. Fixed tab crash during printing. Android Fixed an issue in which, if the user cancels a download by exiting our app chooser dialogue without choosing anything, the download continues invisibly in background. Video chat apps either wouldn't work or be always muted Various security fixes Android Fixed top crasher on Firefox for Android Fixed an issue in which URL fragment identifiers break Service Worker responses. Responsive layout that shows more content for users with wide-screen displays. Highlights section includes web sites saved to Pocket. More options to reorder sections and content on the page. Pocket Sponsored Stories will appear for a percentage of users in the US. Redesigned Cookies and Site Storage section in Preferences for greater clarity and control of first- and third-party cookies. Enhanced camera privacy indicators: Firefox now turns off your camera and the camera's light when you disable video recording, and turns the camera and light on when you resume recording. Added an option for Linux users to show or hide page titles in a bar at the top of the browser. Locale added: Occitan oc. Changed the Windows shortcut for entering Reader View to F9, for better compatibility with keyboard layouts that use AltGr. Updated the Skia graphics library to milestone Changes affecting developers. Fixed an issue in which, after unchecking the "Sponsored Stories" option, the New Tab page now immediately stops displaying "Sponsored content" cards. On touchscreen devices, fixed momentum scrolling on non-zoomable pages. Corrected use of the right default background when opening tabs or windows in high contrast mode. The Firefox uninstaller on Windows is now translated again. Restored translations of the Preferences panels when using a language pack. WebVR has been disabled by default on macOS. Android On touchscreen devices, fixed momentum scrolling on non-zoomable pages. Fix for a crash on macOS related to authentication tokens, e. PK11 or WebAuthn. Desktop Fix for missing nodes in the developer tools Inspector panel. Fix for font rendering when using third-party font managers on OS X Key features include: A completely new browser engine, designed to take full advantage of the processing power in modern devices A redesigned interface with a clean, modern appearance, consistent visual elements, and optimizations for touch screens A unified address and search bar. New installs will see this unified bar. A revamped new tab page that includes top visited sites, recently visited pages, and recommendations from Pocket in the US, Canada, and Germany An updated product tour to orient new and returning Firefox users Support for enterprise environments, with a policy engine that allows customized Firefox deployments using Windows Group Policy or a cross-platform JSON file Firefox now exclusively supports extensions built using the WebExtension API. The "security. Off-cycle stability update [] Same changelog of The settings can also be accessed via the gear icon on the New Tab page. Android Performance enhancements: Quantum CSS improvements which improve page rendering times Faster scrolling due to treating touch event listeners as passive by default Improved security: On-by-default support for the latest draft of the TLS 1. Fixed loss of bookmarks under rare circumstances when upgrading from Firefox Improved playback of Twitch p video streams. Web pages no longer lose focus when a browser popup window is opened. Fixed launching of downloads without a file extension on Windows. Fixed extensions being unable to override the default homepage in certain situations. Improved website rendering with the Retained Display List feature enabled. Fixed broken DevTools panels with certain extensions installed. Desktop Fixed a crash for users with some accessibility tools enabled. Android Fixed a crash on devices running Android KitKat 4. Fixed WebGL rendering issues. Updates from unpacked language packs no longer break the browser. Fixed fallback on startup when a language pack is missing. Fixed an issue in which profile refresh from the Windows stub installer restarts the browser. Properly restored window size and position when restarting on Windows. Avoided crash when sharing a profile with newer as yet unreleased versions of Firefox. Fixed an issue in which you do not undo removal of search engines when using a language pack. Fixed rendering of some web sites. Restored compatibility with some sites using deprecated TLS settings. Fix for screen share on macOS when using multiple monitors. Android Fixed rendering of some web sites. Oversized quick share icons on Android 6. Desktop Fixed hangs on macOS Mojave Fixed playback of some encrypted video streams on macOS. WebExtensions now run in their own process on Linux Firefox now warns about having multiple windows and tabs open when quitting from the main menu Firefox now recognizes the operating system accessibility setting for reducing animation Added search shortcuts for Top Sites: Amazon and Google appear as Top Sites tiles on the Firefox Home New Tab page U. Fixed flickering of some sticky elements on Twitter and other websites. Fixed a hang in Samsung Galaxy devices. Crash fixes. Fixed slow page loading for some users with specific proxy configurations. Disabled HTTP response throttling by default for causing bugs with videos in background tabs. Fixed an issue in which opening magnet links no longer works. Enhanced tab management: You can now select multiple tabs from the tab bar and close, move, bookmark, or pin them quickly and easily. Easier performance management: The new Task Manager page found at about:performance lets you see how much energy each open tab consumes and provides access to close tabs to conserve power. More seamless sharing on Windows: Windows users can now share web pages using the native sharing experience. Added option to remove add-ons using the context menu on their toolbar buttons. Updated the policy engine on macOS to allow using configuration profiles to customize Firefox for enterprise deployments. RSS feed preview and live bookmarks are available only via add-ons. TLS certificates issued by Symantec are no longer trusted by Firefox. The macOS keyboard shortcut to add "www" and ". The Web Console's command line now highlights JavaScript syntax. When hovering over elements in the Accessibility panel, the contrast ratio of text against background is now indicated. Added support for the new CSS scrollbar specification. WebVR is now available on macOS. Android Official Firefox Files downloaded after this update are no longer deleted when uninstalling Firefox. Fixed performance lags for users with installed password manager apps. Fixed an issue that resulted in the loading indicator using too much CPU and power. Properly restored column sizes in developer tools inspector. Fix for updates for some lightweight themes. Desktop Fixed a browser crash on macOS.