66.0.311 Apr 2019 14:25
Address bar on tablets running Windows 10 now behaves correctly ( ), Performance with some HTML5 games ( ), a with keypress events in IBM cloud applications ( ), for keypress events in some Microsoft cloud applications ( ), Updated Baidu search plugin, Reference link to 66.0.2
66.0.228 Mar 2019 03:17
Web compatibility with Office 365, iCloud and IBM WebMail caused by recent changes to the handling of keyboard events ( ), Crash (, ), Reference link to 66.0 release notes
66.020 Mar 2019 13:45
Firefox now prevents websites from automatically playing sound. You can add individual sites to an exceptions list or turn blocking off. To learn more about block autoplay, which will be rolled out gradually to all users, visit the Mozilla blog. Improved search experience:, Smoother scrolling: Scroll anchoring keeps content from jumping as images and ads load at the top of the page, Improved performance and better user experience for extensions:, Redesigned certificate error pages help you better understand and resolve, including identification of certificate rs for anti-virus software, Added basic support for macOS Touch Bar, Experimenting with an improved Pocket experience in New Tab with different layouts and more topical content, Improved performance and reduced crash rates by doubling web content loading processes from 4 to 8, Easier, passwordless security: Added support for Windows Hello on Windows 10, allowing you to use your face, fingerprint, or external security keys for website authentication, The Dark and Light Firefox themes now override the system setting for title bar accent color on Windows 10, Linux users: Resolved an that caused Firefox to freeze when downloading files, Various security, System title bar is hidden by default to match Gnome guideline for Linux users, DevTools Inspector is now fully usable when the Deger is paused, Lowered priority of setTimeout and setInterval during page load to improve overall page load performance, : lt;button gt; element is no longer special cased in event dispatch, per latest specifications
65.0.114 Feb 2019 10:05
Accidental requests to addons.mozilla.org when an addon recommendation doorhanger is shown ( ), Improved playback of interactive Netflix videos ( ), color management not working on macOS ( ), incorrect sizing of the "Clear Recent History" window in some situations ( ), audio amp; video delays while making WebRTC calls ( amp; ), video sizing problems during some WebRTC calls ( ), looping CONNECT requests when using WebSockets over HTTP/2 from behind a proxy server ( ), the "Enter" key not working on password entry fields for certain Linux distributions ( ), Various stability and security. Made support for. lt;meta gt; viewport tags in Responsive Design Mode, initially enabled in Firefox 64, pref-controlled and off by default ( ). To restore the previous behavior, change the. devtools.responsive.metaViewport.enabled pref to true. Reference link to 65.0 release notes
65.030 Jan 2019 15:05
Enhanced tracking protection: Simplified content blocking settings give users standard, strict, and custom options to control online trackers. A redesigned content blocking section in the site information panel shows what Firefox detects and blocks on each website you visit. To learn more about content blocking, visit the Mozilla Blog. A better experience for multilingual users: An updated Language section in Preferences allows users to install multiple language packs and order language preferences for Firefox and websites, without having to download locale-specific versions. Support for Handoff on macOS: Continue browsing across devices. Pick up where you left off with iOS (via Firefox or Safari) on Firefox on Mac. A better video streaming experience for Windows users: Firefox now supports the next-generation, royalty-free video compression technology called AV1. Read about Mozilla s contribution to this new open standard. Improved performance and web compatibility, with support for the WebP image format : WebP brings the same image quality as existing formats at smaller file sizes, which saves bandwidth and speeds up page load. Various security. Enhanced security for macOS, Linux, and Android users via stronger stack smashing protection which is now enabled by default for all platforms. "Stack smashing" is a common security attack in which malicious actors corrupt or take control of a vulnerable program. Firefox will now warn you when closing a window (regardless of whether you have automatic session restore enabled for restart). Easier performance management: The revamped Task Manager page found at about:performance now reports memory usage for tabs and add-ons. Improved the pop-up blocker to prevent multiple pop-up windows from being opened by websites at the same time. Firefox for Windows is now available with 32- and 64-bit MSI installers for easier enterprise deployments. Additional support for Flexbox: Launched a new Flexbox inspector tool that det
64.0.210 Jan 2019 16:05
a browser crash on MacOS ( ), Updated the Japanese translation for missing strings ( ), Properly restore column sizes in developer tools inspector ( ), video stuttering on Youtube ( ), updates for some lightweight themes ( ), Reference link to 64.0 release notes
64.012 Dec 2018 03:15
63.0.316 Nov 2018 03:15
Games using WebGL (created in Unity) get stucks after very short time of gameplay ( ), Slow page loading for some users with specific proxy configurations ( ), Disable HTTP response throttling by default for causing with videos in background tabs ( ), Opening magnet links no longer works ( ), Crash (, ), Reference link to 63.0 release notes
63.0.101 Nov 2018 03:15
Snippets are not loaded due to missing element ( ), Print preview always shows 30 scale when it is actually Shrink To Fit ( ), Dialog displayed when closing multiple windows shows unreplaced 1 S placeholder in Japanese and potentially other locales ( ), Reference link to 63.0 release notes
63.024 Oct 2018 06:25
Performance and visual improvements for Windows users. Performance improvements for macOS users, Added content blocking, a collection of Firefox settings that offer users greater control over technology that can track them around the web. In 63, users can opt to block third-party tracking cookies or block all trackers and create exceptions for trusted sites that don t work correctly with content blocking enabled. 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. When selected these tiles will change focus to the address bar to initiate a search. Currently in US only. Resolved an that prevented the address bar from autofilling bookmarked URLs in certain cases, In the Library, the. Open in Sidebar feature for individual bookmarks was removed, The option to. Never check for updates was removed from about:preferences. You can use the DisableAppUpdate enterprise policy as a substitute. The. Ctrl+Tab shortcut now displays thumbnail previews of your tabs and cycles through tabs in recently used order. This new default behavior is activated only in new profiles and can be changed in preferences. Refreshed visual style of Developer Tools menus to improve navigation and consistency, The Dev Tools accessibility inspector is now enabled by default. This tool surfaces information exposed to assistive technologies on the current page, allowing you to check what s missing or otherwise needs attention. Added support for Web Components custom elements and shadow DOM, The inspector now ships with a Font Editor that allows you to control non-variable as well as variable fonts, Quick Heal internet security software might crash 32-bit Firefox on Windows. A workaround is docume
62.0.303 Oct 2018 12:05
Hangs on macOS Mojave (10.14) when various dialog windows (upload, download, print, etc) are activated ( ), playback of some encrypted video streams on macOS ( ), Various security, Reference link to 62.0.2 release notes
62.0.222 Sep 2018 15:05
Unvisited bookmarks can once again be autofilled in the address bar ( ), WebGL rendering ( ), Updates from unpacked language packs no longer break the browser ( ), fallback on startup when a language pack is missing ( ), Profile refresh from the Windows stub installer restarts the browser ( ), Properly restore window size and position when restarting on Windows ( 1489214 and 1489852 ), Avoid crash when sharing a profile with newer (as yet unreleased) versions of Firefox ( ), Do not undo removal of search engines when using a language pack ( ), rendering of some web sites ( ), Restored compatibility with some sites using deprecated TLS settings ( ), screen share on MacOS when using multiple monitors ( ), Various security, Reference link to 62.0 release notes
62.006 Sep 2018 08:05
Firefox Home (the default New Tab) now allows users to display up to 4 rows of top sites, Pocket stories, and highlights, Reopen in Container tab menu option appears for users with Containers that lets them choose to reopen a tab in a different container, In advance of removing all trust for Symantec-d certificates in Firefox 63, a preference was added that allows users to distrust certificates d by Symantec. To use this preference, go to about:config in the address bar and set the preference "security.pki.distrust_ca_policy" to 2. Added FreeBSD support for WebAuthn, Improved graphics rendering for Windows users without accelerated hardware using Parallel-Off-Main-Thread Painting, Support for CSS Shapes, allowing for richer web page layouts. This goes hand in hand with a brand new Shape Path Editor in the CSS inspector. CSS Variable Fonts (OpenType Font Variations) support, which makes it possible to create beautiful typography with a single font file, Updates for enterprise environments :, Added Canadian English (en-CA) locale, Removed the description field for bookmarks. Users who have stored descriptions using the field may wish to export these descriptions as html or json files, as they will be removed in a future release. Dark theme is automatically enabled in macOS 10.14 dark mode, Changed the default setting to Enforce (3) for the security.pki.name_matching_mode preference, Adobe Flash applets now run in a more secure mode using process sandboxing on macOS. Learn how this may affect features here. Users disconnecting from Sync are now offered the option to wipe their Firefox profile data (including bookmarks, passwords, history, cookies, and site data) from their desktop computer, Changed how WebRTC handles screen sharing: When screen-sharing a window, the window will be brought to front, Three-pane Inspector in Developer Tools separates the rules into its own panel, Changes affecting developers
61.0.210 Aug 2018 03:15
Adds support for automatically restoring your Firefox session after Windows restarts. Currently, this feature is not enabled by default for most users, but will be gradually enabled over the coming weeks. Improved website rendering with the Retained Display List feature enabled ( ), broken DevTools panels with certain extensions installed ( ), a crash for users with some accessibility tools enabled ( ), Reference link to 61.0.1 release notes
61.0.106 Jul 2018 03:15
Broken website loading for Chinese users with accessibility enabled ( ), missing content on the New Tab Page and the Home section of the Preferences page ( ), loss of bookmarks under rare circumstances when upgrading from Firefox 60 ( ), Improved playback of Twitch 1080p video streams ( ), Web pages no longer lose focus when a browser popup window is opened ( ), launching of downloads without a file extension on Windows ( ), Re-allowed downloading files from FTP sites via the "Save Link As" option when linked from HTTP pages ( ), extensions being unable to override the default homepage in certain situations ( ), Reference link to 61.0 release notes
61.027 Jun 2018 03:15
Enhanced performance:, Convenient access to more search engines: You can now add search engines to the address bar Search with tool from the page action menu when on a webpage that provides an OpenSearch plugin, Share links from Firefox for MacOS more easily: You can now share the URL of an active tab from the page actions menu in the address bar, Improved security:, A more consistent user experience: Improvements for dark theme support across the entire Firefox user interface, More customization for tab management: added support to allow WebExtensions to hide tabs, Improved bookmark syncing, Various security, The settings for customizing your homepage and new tab page in Firefox have been added to a new Preferences section that can be accessed from Firefox at about:preferences#home. The settings can also be accessed via the gear icon on the New Tab page.
60.0.207 Jun 2018 09:45
Missing nodes in the developer tools Inspector panel ( ), font rendering when using third-party font managers on OS X 10.11 and earlier ( ), Updated to NSS 3.36.4 from 3.36.1:, Reference link to 60.0.1 release notes
60.0.117 May 2018 12:25
Avoid overly long cycle collector pauses with some add-ons installed ( ), Stop displaying "Sponsored content" on the New Tab page immediately after the "Sponsored Stories" option is disabled ( ), On touchscreen devices, momentum scrolling on non-zoomable pages ( ), black map on Google Maps with updated Nvidia Web Drivers on macOS ( ), Use 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 ( ), Reference link to 60.0 release notes
60.010 May 2018 13:05
Added 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, Redesigned Cookies and Site Storage section in Preferences for greater clarity and control of first- and third-party cookies, Applied Quantum CSS to render browser UI, Added support for Web Authentication API, which allows USB tokens for website authentication, 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. You ll find the Title Bar option in the Customize panel available from the main browser menu. Improved WebRTC audio performance and playback for Linux users, On-by-default support for the latest draft TLS 1.3, Locale added: Occitan (oc), Various security, Changed the Windows shortcut for entering Reader View to F9, for better compatibility with keyboard layouts that use AltGr, Bookmarks no longer support multiple keywords for the same URL unless the request has different POST data, TLS certificates d by Symantec before June 1st, 2016 are no longer trusted by Firefox, Updated the Skia graphics library to milestone 66, Changes affecting developers, After disabling Sponsored Stories from the New Tab page settings, the next opened tab may still show a sponsored tile ( ), WebVR does not work on macOS with Vive headsets ( )
59.0.227 Mar 2018 03:16
Invalid page rendering with hardware acceleration enabled ( ), Windows 7 users with touch screens or certain 3rd party desktop applications which interact with Firefox through accessibility services may experience random browser crashes. Known 3rd party applicatioins with : StickyPassword, Windows 7 touch screen. ( ), Browser keyboard shortcuts (eg copy Ctrl+C) don't work on sites that use those keys with resistFingerprinting enabled ( ), High CPU / memory churn caused by third-party software on some computers ( ), Users who have configured an "automatic proxy configuration URL" and want to reload their proxy settings from the URL will find the Reload button disabled in the Connection Settings dialog when they select Preferences/Options gt; Network Proxy gt; Settings... ( ), URL Fragment Identifiers Break Service Worker Responses ( ), User's trying to cancel a print around the time it completes will continue to get intermittent crashes ( ), Broken getUserMedia (audio) on DragonFly, FreeBSD, NetBSD, OpenBSD. Video chat apps either wouldn't work or be always muted ( ), Reference link to 59.0.1 release notes, Various security
59.014 Mar 2018 08:25
Faster load times for content on the Firefox Home page.
Faster page load times by loading either from the networked cache or the cache on the user s hard drive (Race Cache With Network).
Improved graphics rendering using Off-Main-Thread Painting (OMTP) for Mac users (OMTP for Windows was released in Firefox 58 ), Drag-and-drop to rearrange Top Sites on the Firefox Home page, and customize new windows and tabs in other ways, Added features for Firefox Screenshots :
Basic annotation lets the user draw on and highlight saved screenshots.
Recropping to change the viewable area of saved screenshots, Enhanced WebExtensions API including better support for decentralized protocols and the ability to dynamically register content scripts, Improved Real-Time Communications (RTC) capabilities.
Implemented RTP Transceiver to give pages more fine grained control over calls.
Implemented features to support large scale conferences, Added support for W3C specs for pointer events and improved platform integration with added device support for mouse, pen, and touch screen pointer input, Added the Ecosia search engine as an option for German Firefox, Added the Qwant search engine as an option for French Firefox, Added settings in about:preferences to stop websites from asking to send notifications or access your device s camera, microphone, and location, while still allowing trusted websites to use these features, Various security, Firefox Private Browsing Mode will remove path information from referrers to prevent cross-site tracking, Windows 7 users using accessibility services (like the Windows On-Screen Keyboard) may observe browser crashes after the update to Firefox 59. As a workaround, affected users can prevent external apps from triggering accessibility services in Firefox.
58.0.208 Feb 2018 12:25
Avoid a signature validation during update on macOS, Blocklisted graphics drivers related to off main thread painting crashes, Tab crash during printing, clicking links and scrolling emails on Microsoft Hotmail and Outlook (OWA) webmail, Reference link to 58.0.1 release notes
58.0.130 Jan 2018 20:05
Security, When using certain non-default security policies on Windows (for example with Windows Defender Exploit Protection or Webroot security products), Firefox 58.0 would fail to load pages ( ). Reference link to 58.0 release notes, Users running Firefox for Windows over a Remote Desktop Connection (RDP) may find that audio playback is disabled due to increased security restrictions. Learn how to mitigate this until it is corrected in an upcoming release. Users running certain screen readers may experience performance and are advised to use Firefox ESR until performance are resolved in an upcoming future release
58.024 Jan 2018 06:05
Performance improvements, including:, Improvements to Firefox Screenshots:, Added Nepali (ne-NP) locale. In case you missed it 57 Release privacy and performance feature:
Users can enable Tracking Protection at all times. Learn how to turn Tracking Protection on. Fonts installed in non-standard directories will no longer appear blank for Linux users, Various security, 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. Learn about alternatives to downgrading on our support site. 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.workerStart so sites can measure service worker startup time, Users running Firefox for Windows over a Remote Desktop Connection (RDP) may find that audio playback is disabled due to increased security restrictions. Learn how to mitigate this until it is corrected in an upcoming release. Users running certain screen readers may experience performance and are advised to use Firefox ESR until performance are resolved in an upcoming future release
57.0.405 Jan 2018 12:05
Security to address the Meltdown and Spectre timing attacks, Reference link to 57.0.3 release notes
57.0.329 Dec 2017 03:16
a crash reporting that inadvertently sends background tab crash reports to Mozilla without user opt-in ( ), Reference link to 57.0.2 release notes
57.0.208 Dec 2017 03:15
Block old versions of G Data Endpoint Security for crashing Firefox on start up - Windows only ( ), a regression with WebGL and D3D9 - Windows only, Reference link to 57.0.1 release notes
57.0.130 Nov 2017 06:45
a video color distortion on YouTube and other video sites with some AMD devices (), an with prefs.js when the profile path has non-ascii characters ( ), Various security, Google map crashes on OSX with Intel HD Graphics 3000, Block injection of a client library associated with the RealPlayer Free player which is known to cause performance problems in Firefox. ( ), Reference link to 57.0 release notes
57.015 Nov 2017 10:45
A completely new browsing 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. Learn how to add the stand-alone search bar to the toolbar, 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, Firefox now exclusively supports extensions built using the WebExtension API, and unsupported legacy extensions will no longer work. Learn more about our efforts to improve the performance and security of extensions, 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. If you relied on this feature, you can install the Share Backported extension instead. Some older versions of the ATOK IME, including ATOK 2006, 2008, 2009 and 2010, can cause crashes and are therefore disabled on the Windows 64-bit version of Firefox Quantum. To those incompatibility, please use a newer version of ATOK or one of other IMEs. The default font for Japanese text is now Meiryo, Complete visual refresh of both the
56.0.227 Oct 2017 19:25
Disable Form Autofill completely on user request ( ), for video-related crashes on Windows 7 ( ), Correct detection for 64-bit GSSAPI authentication ( ), for shutdown crash (), Reference link to 56.0.1 release notes
56.0.110 Oct 2017 06:45
Block D3D11 when using Intel drivers on Windows 7 systems with partial AVX support ( ), Users of 32-bit Firefox on 64-bit Windows are migrated to 64-bit Firefox for increased stability and security. Reference link to 56.0 release notes, Due to a in Mac OS X High Sierra, fullscreen mode has some, Startup crash with RelevantKnowledge adware installed. Firefox Support has helpful instructions to remove it. Users running Firefox for Windows over a Remote Desktop Connection (RDP) may find that audio playback is disabled due to increased security restrictions. Learn how to mitigate this until it is corrected in an upcoming release, Startup crashes with 64-bit Firefox on Windows 7, for users of Lenovo's "OneKey Theater" software for IdeaPad laptops. To this crash, please re-install 32-bit Firefox.
56.029 Sep 2017 08:25
Launched Firefox Screenshots, a feature that lets users take, save, and share screenshots without leaving the browser, Added support for address form autofill (en-US only), Updated Preferences, Media opened in a background tab will not play until the tab is selected, Improved Send Tabs feature of Sync for iOS and Android, and Send Tabs can be discovered even by users without a Firefox Account, Replaced character encoding converters with a new Encoding Standard -compliant implementation written in Rust, Added hardware acceleration for AES-GCM, Updated the Safe Browsing protocol to version 4, Reduced update download file size by approximately 20 percent, Improved security for verifying update downloads, Added Layout Panel to CSS Grid DevTools, Startup crash with RelevantKnowledge adware installed. Firefox Support has helpful instructions to remove it. Users running Firefox for Windows over a Remote Desktop Connection (RDP) may find that audio playback is disabled due to increased security restrictions. Learn how to mitigate this until it is corrected in an upcoming release, Startup crashes with 64-bit Firefox on Windows 7, for users of Lenovo's "OneKey Theater" software for IdeaPad laptops. To this crash, please re-install 32-bit Firefox. Due to a in Mac OS X High Sierra, fullscreen mode has some
55.0.326 Aug 2017 07:45
File uploads to some websites, including YouTube ( ), an with addons when using a path containing non-ascii characters ( ), Reference link to 55.0 release notes
55.0.217 Aug 2017 19:25
a potential when the username had some specific characters in the path ( ), an with new installation notification for sideload add-ons ( ), performance regressions with WebExtension ( 1386937 amp; 1389381 ), a regression with the popup menu ( )
55.0.112 Aug 2017 06:45
a regression the tab restoration process ( ), a problem causing. What's new pages not to be displayed ( ), a rendering with some PKCS#11 libraries ( ), Disable the predictor prefetch ( ), Reference link to 55.0 release notes
55.009 Aug 2017 03:17
Launched Windows support for WebVR, bringing immersive experiences to the web. See examples and try working demos at Mozilla VR. Added options that let users optimize recent performance improvements, Simplified installation process with a streamlined Windows stub installer, Improved address bar functionality, Updated Sidebar for bookmarks, history, and synced tabs so it can appear at the right edge of the window as well as the left, Added support for stereo microphones with WebRTC, Pages can be simplified before printing from within Print Preview, Updated Firefox for OSX and macOS to allow users to assign custom keyboard shortcuts to Firefox menu items via System Preferences, Browsing sessions with a high number of tabs are now restored in an instant, Make screenshots of webpages, and save them locally or upload them to the cloud. This feature will undergo A/B testing and will not be visible for some users. Added Belarusian (be) locale, Various security, Made the Adobe Flash plugin click-to-activate by default and allowed only on http:// and https:// URL schemes. (This change will not be visible to all users immediately. For more information see the Firefox plugin roadmap ), Firefox does not support downgrades, even though this may have worked in past versions. Users who install Firefox 55+ and later downgrade to an earlier version may experience with Firefox. 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. Sites that don t use SSL can no longer access Geolocation APIs to determine a user s physical location
54.0.130 Jun 2017 04:05
a display of tab title ( ), a display of opening new tab ( ), a display when opening multiple tabs ( ), a tab display when downloading files ( ), a PDF printing ( ), a Netflix on Linux ( ), Reference link to 54.0 release notes
54.014 Jun 2017 19:05
Added Burmese (my) locale, Added support for multiple content processes (e10s-multi), Simplified the download button and download status panel, Various security, Moved the mobile bookmarks folder to the main bookmarks menu for easier access, Additional changes for web developers, Added ability to create and save custom devices in Responsive Design Mode
53.0.320 May 2017 06:45
Hangs when using a proxy with NTLM authentication ( ), excessive resource usage from the captive portal detection service ( ), Bump preloaded security information expiration times ( ), Reference link to 53.0.2 release notes
53.0.207 May 2017 15:45
Make form validation errors and date picker panel visible to the user ( ), Various security, The non-standard showDialog argument to window.find is now ignored ( 1348409 ), Reference link to 53.0 release notes
53.020 Apr 2017 14:25
Improved graphics stability for Windows users with the addition of compositor process separation (Quantum Compositor), 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, Windows 7+ users on 64-bit OS can select 32-bit or 64-bit versions in the stub installer, Various security, 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. XP and Vista users running Firefox 52 will continue to receive security updates on Firefox ESR 52. 32-bit Mac OS X is no longer supported. 32-bit Mac OS X users can switch to Firefox ESR 52 to continue receiving security updates. Updates for Mac OS X are smaller in size compared to updates for Firefox 52, New visual design for audio and video controls, Ended Firefox Linux support for processors older than Pentium 4 and AMD Opteron, The last few characters of shortened tab titles fade out instead of being replaced by ellipses to keep more of the title visible, Changes for web developers, Support for WebM video with alpha, which allows playing videos with transparent backgrounds
52.0.229 Mar 2017 03:15
New installs erroneously not prompting to change the default browser setting, a crash on startup on Linux, loading tab icons on session restore, Use Nirmala UI as fallback font for additional Indic languages, Reference link to 52.0.1 release notes
52.008 Mar 2017 03:15
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. 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. Added user warnings for non-secure HTTP pages with logins. 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. Enhanced Sync to allow users to send and open tabs from one device to another. Various security, Improved text input for third-party keyboard layouts on Windows. This will address some keyboard layouts that, Removed support for Netscape Plugin API (NPAPI) plugins other than Flash. Silverlight, Java, Acrobat and the like are no longer supported. Improved experience for downloads:, Removed Battery Status API to reduce fingerprinting of users by trackers, When not using Direct2D on Windows, Skia is used for content rendering, Migrated Firefox users on Windows XP and Windows Vista operating systems to the extended support release (ESR) version of Firefox. Display (but allow 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.) Read more about the Mozilla Security Team s plans to deprecate SHA-1, Enabled CSS Grid Layout, opening up a world of new possibilities for graphic design, Improved security for
51.0.129 Jan 2017 05:05
Reference link to 51.0 release notes, Geolocation not working on Windows ( 1333516 ), Multiprocess incompatibility did not correctly register with some add-ons ( 1333423 ), Crash with some older versions of Forcepoint/Websense
51.025 Jan 2017 08:05
Users can view passwords in the save password prompt before saving them, Added a zoom button in the URL bar:, Improved video performance for users without GPU acceleration for less CPU usage and a better full screen experience, Firefox will save passwords even in forms that do not have submit events, Added support for FLAC (Free Lossless Audio Codec) playback, Added support for WebGL 2, with advanced graphics rendering features like transform feedback, improved texturing capabilities, and a new sophisticated shading language, A warning is displayed when a login page does not have a secure connection, Added Georgian (ka) and Kabyle (kab) locales, An even faster E10s! Tab Switching is better!, Improved reliability of browser data sync, Remove Belarusian (be) locale, Various security, Use 2D graphics library (Skia) for content rendering on Linux, Re-enabled E10s support for Russian (ru) locale, Updated to NSS 3.28.1
50.0.129 Nov 2016 03:45
Various security, Firefox crashes with 3rd party Chinese IME when using IME text, Reference link to Firefox 50.0 release notes
50.016 Nov 2016 06:05
Updates to keyboard shortcuts, Added option to Find in page that allows users to limit search to whole words only, Added Guarani (gn) locale, Increased availability of WebGL to more than 98 percent of users on Windows 7 and newer, Added download protection for a large number of executable file types on Windows, Mac and Linux, Improved performance for SDK extensions or extensions using the SDK module loader, Playback video on more sites without plugins with WebM EME Support for Widevine on Windows and Mac, rendering of dashed and dotted borders with rounded corners ( border-radius ), Various security, Added a built-in Emoji set for operating systems without native Emoji fonts (Windows 8.0 and lower and Linux), Blocked versions of libavcodec older than 54.35.1, Changes for web developers
49.0.221 Oct 2016 03:15
Asynchronous rendering of the Flash plugins is now enabled by default. This should improve performance and reduce crashes for sites that use the Flash plugin. ( ), Change D3D9 default fallback preference to prevent graphical artifacts ( ), Network prevents some users from seeing the Firefox UI on startup ( ), Web compatibility with file uploads ( ), Various security, Web compatibility with Array.prototype.values ( ), Diagnostic information on timing for tab switching ( ), a Canvas filters graphics affecting HTML5 apps ( ), Reference link to Firefox 49.0.1 release notes
49.0.127 Sep 2016 06:05
Mitigate a startup crash caused by Websense (Windows only) ( ), Reference link to Firefox 49.0 release notes
49.021 Sep 2016 05:45
Updated Firefox Login Manager to allow HTTPS pages to use saved HTTP logins. 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, 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 1.25x speed, Enhancements for Mac users, Improvements in about:memory reports for tracking font memory usage, Improve performance on Windows systems without hardware acceleration, an 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. Various security, Ended Firefox for Mac support for OS X 10.6, 10.7, and 10.8. Ended Firefox for Windows support for SSE processors, 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
48.0.119 Aug 2016 11:25
48.003 Aug 2016 11:25
Process separation (e10s) is enabled for some of you. Like it? Let us know and we'll roll it out to more. Roar for moar protection against harmful downloads ! We've got your back, Add-ons that have not been verified and signed by Mozilla will not load, GNU/Linux fans: Get better Canvas performance with speedy Skia support. Try saying that three times fast, WebRTC embetterments:, Searching for something already in your bookmarks or open tabs? We added super smart icons to let you know, Windows folks: Tab (move buttons) and Shift+F10 (pop-up menus) now behave as they should in Firefox customization mode, The media parser has been redeveloped using the Rust programming language, Windows 7 systems without Platform Update can now use D3D11 WARP, Various security, Improved step deging on last line of functions, Heyo, Jabra amp; Logitech C920 webcam users. We those pesky WebRTC causing frequency distortions. Buh-bye, squeaky voice!, After version 48, SSE2 CPU extensions are going to be required on Windows, So long to support for 10.6, 10.7 and 10.8. Now we can focus on where most Mac users are: 10.9. Don't forget to upgrade!, Au revoir to Windows Remote Access Service modem Autodial, WebExtensions support is now considered as stable, Workers can now use the Web Crypto API, Want to move absolute amp; positioned elements? (Who doesn't, right?) Now you can with our geometry editor. The memory tool now has a tree map view for your deging pleasure. It's a little bit of "boo" and a whole lot of "ya.", We're putting the spotlight on the background. Now you can deWebExtensions background content scripts and background pages, Content Security Policy (CSP) is now enforced for WebExtensions. (Who's down with CSP?), Old and busted: Error Console. New hotness: Browser Console for your deging pleasure. Add-on development just got easier because you can reload them from about:deging because we're all about deging. This theme is hot, hot, hot! Say hi to the Firetheme
47.0.129 Jun 2016 03:15
Selenium WebDriver may cause Firefox to crash at startup, Reference link to Firefox 47.0 release notes
47.008 Jun 2016 03:15
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. Enable VP9 video codec for users with fast machines, Embedded YouTube videos now play with HTML5 video if Flash is not installed. View and search open tabs from your smartphone or another computer in a sidebar, Allow no-cache on back/forward navigations for https resources, Latgalu ltg locale added. Wikipedia tells us there are 164,500 daily speakers. Various security, FUEL (Firefox User Extension Library) has been removed. Add-ons relying on it will stop working. The browser.sessionstore.restore_on_demand preference has been reset to its default value (true) to avoid e10s performance problems. Because faster is better!, The Firefox click-to-activate plugin whitelist has been removed. Web platform changes, View, start,and deregistered Service Workers in the Service Workers developer tool, Simulate Push messages in the Service Workers developer tool, 'Start' button for service workers in about:deging to start registered Service Workers, Changes that can affect add-on compatibility, Added support for ChaCha20/Poly1305 cipher suites, Custom user agents supported in Responsive Design Mode, Smart multi-line input in the Web Console, cuechange events are now available on TextTrack objects, WebCrypto: PBKDF2 supports SHA-2 hash algorithms, WebCrypto: RSA-PSS signature support, Known with old invalid paper size printing prefs ( 1276717 )
46.0.104 May 2016 05:05
Page loading related to antivirus software ( 1268922 ), Search plugin for various locales ( 1246494 ), Add-on signing certificate expiration ( 1267318 ), Service worker update ( 1267733 ), Build when jit is disabled ( 1266366 ), Limit Sync registration updates ( 1262312 ), Reference link to Firefox 46.0 release notes
46.027 Apr 2016 03:15
45.0.217 Apr 2016 03:15
an impacting the cookie header when third-party cookies are blocked ( 1257861 ), a web compatibility regression impacting the. srcset attribute of the. image tag ( 1259482 ), a regression with the copy and paste with some old versions of some Gecko applications like Thunderbird ( 1254980 ), a crash impacting the video playback with Media Source Extension ( 1258562 ), a regression impacting some specific uploads ( 1255735 ), Reference link to Firefox 45.0.1 release notes
45.0.119 Mar 2016 20:45
a potential performance regression (Youtube for example) ( 1220502 ), a regression causing search engine settings to be lost in some context ( 1254694 ), Bring back non-standard jar: URIs to a regression in IBM iNotes ( 1255139 ). XSLTProcessor.importStylesheet was failing when. lt;import gt; was used ( 1249572 ), an which could cause the list of search provider to be empty ( 1255605 ), a regression when using the location bar ( 1254503 ), some loading when. Accept third-party cookies: was set to. Never ( 1254856 ), Disabled Graphite font shaping library
45.009 Mar 2016 04:05
Instant browser tab sharing through Hello, 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, Introduce a new preference (. network.dns.blockDotOnion ) to allow blocking.onion at the DNS level, Guarani gn locale added, URLs containing a Unicode-format Internationalized Domain Name (IDN) are now properly redirected, Various security, Tab Groups (Panorama) feature removed, Ability to filter snapshot output in memory tool, Fine tune 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, Push API support, part of Progressive Web Applications, Support delivery of a Content Security Policy (CSP) via a meta tag, Web Speech synthesis API, ES6 Classes, On-screen keyboard support was temporarily turned off for Windows 8 and Windows 8.1
44.0.213 Feb 2016 11:25
Firefox hangs or crashes on startup ( 1243098 ), Various security, Reference: Release notes for Firefox 44.0.1
44.0.109 Feb 2016 10:25
Which could lead to the removal of stored passwords under certain circumstances ( 1242176 ), Allows spaces in cookie names ( 1244505 ), WebSockets when used in a Service Worker context ( 1243942 ), Disable opus/vorbis audio with H.264 ( 1245696 ), Require NSS 3.21 ( 1244069 ), Ship the Gecko SDK ( 1243740 ), for graphics startup crash (GNU/Linux) ( 1222171 ), a crash in cache networking ( 1244076 )
44.027 Jan 2016 14:05
Improved warning pages for certificate errors and untrusted connections, Enable H.264 if system decoder is available, Enable WebM/VP9 video support on systems that don't support MP4/H.264, In the animation-inspector timeline, lightning bolt icon next to animations running on the compositor thread, Support the brotli compression format via HTTPS content-encoding, Screenshot commands allow user choice of pixel ratio in Developer Tools, Windows XP and Vista screensaver doesn't disable when watching videos ( ), Various security, To support unicode-range descriptor for webfonts, font matching under Linux now uses the same font matching code as other platforms, Use a SHA-256 signing certificate for Windows builds, to meet new signing requirements, Firefox has removed support for the RC4 decipher, Firefox will no longer trust the Equifax Secure Certificate Authority 1024-bit root certificate or the UTN - DATACorp SGC to validate secure website certificates, Stricter validation of web fonts, On-screen keyboard support temporarily turned off for Windows 8 and Windows 8.1, Right click on a logged object in the console to store it as a global variable on the page, Visual tools for Animation:, Visual tools for Layout and Styles:, 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, Jump to function definitions in the deger with Cmd-Click, WebSocket Deging API and add-on, The rule view now displays styles using their authored text,
And edits in the rule view are now linked to the style editor
43.0.407 Jan 2016 03:15
For startup crash for users of a third party antivirus tool ( ), Multi-user GNU/Linux download folders can be created ( ), Re-enable SHA-1 certificates ( ), Reference: Release notes for Firefox 43.0.3
43.0.329 Dec 2015 03:15
network when using Nvidia's Network Access Manager ( 1233237 ). On some Windows configurations, improve the decoding of some videos on YouTube ( 1233970 ). Reference: Release notes for Firefox 43.0.2
43.0.225 Dec 2015 03:15
Various stability and security. Use a SHA-256 signing certificate for Windows builds, to meet new signing requirements. Reference: Release notes for Firefox 43.0.1
42.004 Nov 2015 21:45
Private Browsing with Tracking Protection blocks certain Web elements that could be used to record your behavior across sites, Control Center that contains site security and privacy controls, Indicator added to tabs that play audio with one-click muting, WebRTC improvements:, Login Manager improvements:, Improved performance on interactive websites that trigger a lot of restyles, Implemented ES6 Reflect, Support ImageBitmap and createImageBitmap(), Media Source Extension for HTML5 video available for all sites, View HTML source in a tab, Remote website deging over WiFi (no USB cable or ADB needed), Asynchronous call stacks now allow web developers to follow the code flow through setTimeout, DOM event handlers, and Promise handlers. Configurable Firefox OS Simulator in WebIDE, to simulate reference devices like phones, tablets, even TVs, CSS filter presets in the Inspector, Ability to save filter presets inside CSS Filter Tooltip, Various security, URLs containing a Unicode-format Internationalized Domain Name (IDN) are not redirected properly, leading to a. Server Not Found error.
41.0.102 Oct 2015 09:25
Startup crash in mozilla::layers::CompositorD3D11::GetTextureFactoryIdentifier(), Changing properties of a new bookmark while adding it acts on the last bookmark in the current container, Firefox hangs with flash plugins, Startup crash in nsStyleSet::GatherRuleProcessors(nsStyleSet::sheetType) possibly related to Yandex toolbar and Adblock Plus, Crash in mozilla::gl::GLBlitHelper::BlitImageToTexture
41.023 Sep 2015 16:05
40.0.329 Aug 2015 08:05
Disable the asynchronous plugin initialization ( 1198590 ), a segmentation fault in the GStreamer support (GNU/Linux) ( 1145230 ), a startup crash when using DisplayLink (Windows Only) ( 1195844 ), a regression with some Japanese fonts used in the lt;input gt; field ( 1194055 ), On some sites, the selection in a select combox box using the mouse could be broken ( 1194733 ), Some search partner codes were missing ( 1195683 ), Various security
40.0.216 Aug 2015 11:45
Enabled API allowing Windows 10 users to open settings dialog (1193196), mozalloc.lib was missing from the xulrunner package (1168291), Fix a startup crash with some combination of hardware and drivers (1160295)
40.012 Aug 2015 19:05
Support for Windows 10, 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 (GNU/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, NPAPI Plug-in performance improved via asynchronous initialization, 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.detune to modulate playback rate in cents, a logarithmic unit of measure used for
musical intervals, Improved Performance tools in the developer tools: Waterfall view, Call Tree view and a Flame Chart view, New rules view tooltip in the Inspector to tweak CSS Filter values, Console API messages from SharedWorker and ServiceWorker are now displayed in web console, 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, Kannada text does not display properly in built-in pdf viewer, Various security fixes, If Firefox is restarted from an add-on install notification, on-going private browsing downloads might be canceled without warning (1185294)
39.004 Jul 2015 11:05
Share Hello URLs with social networks, Project Silk: Smoother animation and scrolling (Mac OS X), Support for 'switch' role in ARIA 1.1 (web accessibility), SafeBrowsing malware detection lookups enabled for downloads (Mac OS X and Linux), Support for new Unicode 8.0 skin tone emoji, 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 (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, Implement. lt;link rel="preconnect" gt;allowing anticipation of a future connection without revealing any information, Added support for CSS Scroll Snap Points, 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, localhost is now available offline for WebSocket connections, Improve performance for IPv6 fallback to IPv4, Fix incomplete downloads being marked as complete by detecting broken HTTP1.1 transfers, 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, A regression that could lead to Flash not displaying has been fixed, Update to NSS 3.19.2, Various security fixes
38.0.503 Jun 2015 07:45
Keep track of articles and videos with Pocket, Clean formatting for articles and blog posts with Reader View, Share the active tab or window in a Hello conversation, A race condition that would cause Firefox to stop painting when switching tabs (), Fixed graphics performance when using the built-in VGA driver on Windows 7 (), Responsive images do not update when the enclosing viewport changes
38.0.118 May 2015 19:45
Systems with first generation NVidia Optimus graphics cards may crash on start-up, Users who import cookies from Google Chrome can end up with broken websites, Large animated images may fail to play and may stop other images from loading, WebRTC H264 video streams from CiscoSpark native clients are not decoded correctly. (Fixed in Firefox ESR 38.0.1; was already fixed in Firefox 38.0), Responsive images do not update when the enclosing viewport changes
38.014 May 2015 05:05
New tab-based preferences, Ruby annotation support, Base for the next ESR release. autocomplete=off is no longer supported for username/password fields, URL parser avoids doing percent encoding when setting the Fragment part of the URL, and percent decoding when getting the Fragment in line with the URL spec, RegExp.prototype.source now returns "(?:)" instead of the empty string for empty regular expressions, Improved page load times via speculative connection warmup, WebSocket now available in Web Workers, BroadcastChannel API implemented, Implemented srcset attribute and lt;picture gt; element for responsive images, Implemented DOM3 Events KeyboardEvent.code, Mac OS X: Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube, Implemented Encrypted Media Extensions (EME) API to support encrypted HTML5 video/audio playback (Windows Vista or later only), Automatically download Adobe Primetime Content Decryption Module (CDM) for DRM playback through EME (Windows Vista or later only), 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,. copy command added to console, Various security fixes, Responsive images do not update when the enclosing viewport changes
37.0.221 Apr 2015 08:45
Google Maps may render incorrectly in some cases, Stability fixes for select graphics hardware and feature sets, Various security fixes
37.0.106 Apr 2015 13:05
Disabled HTTP/2 AltSvc, Start-up crash due to graphics hardware and third party software, Various security fixes
37.002 Apr 2015 11:25
Heartbeat user rating system - your feedback about Firefox.
Yandex set as default search provider for the Turkish locale.
Bing search now uses HTTPS for secure searching.
Improved protection against site impersonation via OneCRL centralized certificate revocation.
Opportunistically encrypt HTTP traffic where the server supports HTTP/2 AltSvc.
Disabled insecure TLS version fallback for site security.
Extended SSL error reporting for reporting non-certificate errors.
TLS False Start optimization now requires a cipher suite using AEAD construction.
Improved certificate and TLS communication security by removing support for DSA.
Improved performance of WebGL rendering on Windows.
Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube (Windows Vista or later only).
Added support for CSS display:contents.
IndexedDB now accessible from worker threads.
New SDP/JSEP implementation in WebRTC.
Debug tabs opened in Chrome Desktop, Chrome for Android, and Safari for iOS.
New Inspector animations panel to control element animations.
New Security Panel included in Network Panel.
Debugger panel support for chrome:// and about:// URIs.
Added logging of weak ciphers to the web console.
Various security fixes.
33.016 Oct 2014 01:05
Introduction of OpenH264 video playback support.
Media pane to send video stream onto Chromecast or Roku devices.
Windows: OMTC enabled by default.
Improved search experience through the location bar.
Search suggestions on the Firefox Start (about:home) and new tab
New CSP (Content Security Policy) backend.
Support for connecting to HTTP proxy over HTTPS.
Improved reliability of the session restoration.
Proprietary window.crypto properties/functions removed.
DOMMatrix interface implemented. @counter-style rule from CSS3 Counter
Styles specification implemented.
Developer-Tools: Cubic-bezier curves editor. Display which
elements have listeners attached.
Fix incomplete downloads being marked as complete by detecting broken
31.023 Jul 2014 21:13
This release enhances child-safe browsing and parental control with the Prefer:Safe HTTP header, and better blocking for downloaded malware. It also introduces many new developer features, like declaring CSS3 variable names, and a canvas debugger for Web2D and 3D WebGL rendering. PKIX is now the default certification verification, MathML table support, internal OGG and PDF viewing without associated MIME handler, WebVTT implementation, and Array.prototype.fill(). The developer tools allow editing the box model, provide a new Eyedropper tool, enhanced the code editor, stack traces on the console, styled logs. And various security fixes were incorporated.