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.