Mozilla has released Version 34.0 of the Firefox browser.
What’s New
  • NEW
    Default search engine changed to Yandex for Belarusian, Kazakh, and Russian locales

  • NEW
    Improved search bar (en-US only)

  • NEW
    Firefox Hello real-time communication client

  • NEW
    Easily switch themes/personas directly in the Customizing mode

  • NEW
    Wikipedia search now uses HTTPS for secure searching (en-US only)

  • NEW
    Implementation of HTTP/2 (draft14) and ALPN

  • NEW
    Recover from a locked Firefox process in the "Firefox is already running" dialog on Windows

  • CHANGED
    Disabled SSLv3

  • CHANGED
    Proprietary window.crypto properties/functions re-enabled (to be removed in Firefox 35)

  • CHANGED
    Firefox signed by Apple OS X version 2 signature

  • HTML5
    ECMAScript 6 WeakSet Implemented

  • HTML5
    JavaScript Template Strings Implemented

  • HTML5
    CSS3 Font variants and features control (e.g. kerning) implemented

  • HTML5
    WebCrypto: RSA-OAEP, PBKDF2 and AES-KW support

  • HTML5
    WebCrypto: wrapKey and unwrapKey implemented

  • HTML5
    WebCrypto: Import/export of JWK-formatted keys

  • HTML5
    matches() DOM API implemented (formerlymozMatchesSelector())

  • HTML5
    Performance.now() for workers implemented

  • HTML5
    WebCrypto: ECDH support

  • DEVELOPER
    Link Removed: Create, edit, and test a new Web application from your browser

  • DEVELOPER
    Highlight all nodes that match a given selector in the Style Editor and the Inspector's Rules panel

  • DEVELOPER
    Improved User Interface of the Profiler

  • DEVELOPER
    console.table function added to web console

  • FIXED
    CSS transitions start correctly when started at the same time as changes to display, position, overflow, and similar properties

  • FIXED
    Various security fixes
 


In The U.S. the default search engine changed from Google to Yahoo.
 


Mozilla has released Version 35.0 of the Firefox browser.

What’s New
  • NEW
    Firefox Hello with new rooms-based conversations model

  • NEW
    New search UI improved and enabled for more locales

  • NEW
    Access the Link Removed from the Tools menu and optional toolbar button

  • NEW
    Built-in support for H264 (MP4) on Mac OS X Snow Leopard (10.6) and newer through native APIs

  • NEW
    Use tiled rendering on OS X

  • NEW
    Improved high quality image resizing performance

  • NEW
    Improved handling of dynamic styling changes to increase responsiveness

  • NEW
    Implemented HTTP Public Key Pinning Extension (for enhanced authentication of encrypted connections)

  • HTML5
    Added support for the CSS Font Loading API

  • HTML5
    Resource Timing API implemented

  • HTML5
    CSS filters enabled by default

  • HTML5
    Changed JavaScript 'let' semantics to match the ES6 specification

  • DEVELOPER
    Support for inspecting ::before and ::after pseudo elements

  • DEVELOPER
    Computed view: Nodes matching the hovered selector are now highlighted

  • DEVELOPER
    Network Monitor: New request/response headers view (more info)

  • DEVELOPER
    Added support for the EXT_blend_minmax WebGL extension

  • FIXED
    Show DOM Properties context menu item in inspector

  • FIXED
    Reduced resource usage for scaled images

  • FIXED
    PDF.js updated to version 1.0.907

  • FIXED
    Non-HTTP(S) XHR now returns correct status code

  • FIXED
    Various security fixes
Known Issues
  • UNRESOLVED
    Sometimes images don't display when hovered over (seebug 1083113)

  • UNRESOLVED
    WebGL games might not display some textures (see bug 1113633)

  • UNRESOLVED
    Issues affecting RTL in Hello can be found here
ref:
https://www.mozilla.org/en-US/firefox/35.0/releasenotes/
 


Mozilla has released Version 35.0.1 of the Firefox browser.

What’s New
  • FIXED

    35.0.1 - With the Enhanced Steam extension, Firefox could crash (1123732)

  • FIXED
    35.0.1 - Fix a potential startup crash (1122367)

  • FIXED
    35.0.1 - Kerberos authentication did not work with alias (1108971)

  • FIXED
    35.0.1 - SVG / CSS animation had a regression causing rendering issues on websites like openstreemap.org (1083079)

  • FIXED
    35.0.1 - On Godaddy webmail, Firefox could crash (1113121)

  • FIXED
    35.0.1 - document.baseURI did not get updated to document.location after base tag was removed from DOM for site with a CSP (1121857)

  • FIXED
    35.0.1 - With a Right-to-left (RTL) version of Firefox, the text selection could be broken (1104036)

  • FIXED
    35.0.1 - CSP had a change in behavior with regard to case sensitivity resources loading (1122445)

  • NEW
    Firefox Hello with new rooms-based conversations model

  • NEW
    New search UI improved and enabled for more locales

  • NEW
    Access the Link Removed from the Tools menu and optional toolbar button

  • NEW
    Built-in support for H264 (MP4) on Mac OS X Snow Leopard (10.6) and newer through native APIs

  • NEW
    Improved handling of dynamic styling changes to increase responsiveness

  • NEW
    Use tiled rendering on OS X

  • NEW
    Improved high quality image resizing performance

  • HTML5
    Changed JavaScript 'let' semantics to conform better to the ES6 specification

  • HTML5
    Resource Timing API implemented

  • HTML5
    CSS filters enabled by default

  • HTML5
    Added support for the CSS Font Loading API

  • DEVELOPER
    Support for inspecting ::before and ::after pseudo elements

  • DEVELOPER
    Computed view: Nodes matching the hovered selector are now highlighted

  • DEVELOPER
    Network Monitor: New request/response headers view (more info)

  • DEVELOPER
    Added support for the EXT_blend_minmax WebGL extension

  • FIXED
    Various security fixes

  • FIXED
    Show DOM Properties context menu item in inspector

  • FIXED
    Reduced resource usage for scaled images

  • FIXED
    PDF.js updated to version 1.0.907

  • FIXED
    Non-HTTP(S) XHR now returns correct status code
Known Issues
  • UNRESOLVED
    WebGL games might not display some textures (see bug 1113633)

  • UNRESOLVED
    Sometimes images don't display when hovered over (seebug 1083113)

  • UNRESOLVED
    Issues affecting RTL in Hello can be found here
 


Mozilla has released Version 36.0 of the Firefox browser.

What’s New
  • NEW

    Pinned tiles on the new tab page can be synced

  • NEW
    Support for the full HTTP/2 protocol. HTTP/2 enables a faster, more scalable, and more responsive web.

  • NEW
    Locale added: Uzbek (uz)

  • CHANGED
    -remote option removed

  • CHANGED
    No longer accept insecure RC4 ciphers whenever possible

  • CHANGED
    Phasing out Certificates with 1024-bit RSA Keys

  • CHANGED
    Shut down hangs will now show the crash reporter before exiting the program

  • CHANGED
    Add-on Compatibility

  • HTML5
    Support for the ECMAScript 6 Symbol data type added

  • HTML5
    unicode-range CSS descriptor implemented

  • HTML5
    CSSOM-View scroll behavior implemented allowing smooth scrolling of content without custom libraries

  • HTML5
    object-fit and object-position implemented.
    Defines how and where the content of a replaced element is displayed

  • HTML5
    isolation CSS property implemented.
    Create a new stacking context to isolate groups of boxes to control which blend together

  • HTML5
    CSS3 will-change property implemented.
    Hints the browser of elements that will be modified. The browser will perform some performance optimization for these

  • HTML5
    Changed JavaScript 'const' semantics to conform better to the ES6 specification.
    The const declaration is now block-scoped and requires an initializer. It also can not be redeclared anymore.

  • HTML5
    Improved ES6 generators for better performance

  • DEVELOPER
    Eval sources now appear in the Debugger
    Debug JavaScript code that is evaluated dynamically, either as a string passed to eval() or as a string passed to the Function constructor

  • DEVELOPER
    DOM Promises inspection

  • DEVELOPER
    Inspector: More paste options in markup view

  • FIXED
    CSS gradients work on premultiplied colors

  • FIXED
    Fix some unexpected logout from Facebook or Google after restart

  • FIXED
    Various security fixes
Known Issues
  • UNRESOLVED
    Style Editor: Extra white space appearing above the editor for a sourcemapped scss file (1128747)
 


Mozilla has released Version 36.0.1 of the Firefox browser.
What’s New
  • FIXED

    36.0.1 - Disable the usage of the ANY DNS query type (1093983)

  • FIXED
    36.0.1 - Fixed a startup crash with EMET (1137050)

  • FIXED
    36.0.1 - Hello may become inactive until restart (1137469)

  • FIXED
    36.0.1 - Print preferences may not be preserved (1136855)

  • FIXED
    36.0.1 - Hello contact tabs may not be visible (1137141)

  • FIXED
    36.0.1 - Accept hostnames that include an underscore character ("_") (1136616)

  • FIXED
    36.0.1 - WebGL may use significant memory with Canvas2d (1137251)

  • FIXED
    36.0.1 - Option -remote has been restored (1080319)

  • FIXED
    36.0.1 - Fix a top crash

  • NEW
    Pinned tiles on the new tab page can be synced

  • NEW
    Support for the full HTTP/2 protocol. HTTP/2 enables a faster, more scalable, and more responsive web.

  • NEW
    Locale added: Uzbek (uz)

  • CHANGED
    -remote option removed

  • CHANGED
    No longer accept insecure RC4 ciphers whenever possible

  • CHANGED
    Phasing out Certificates with 1024-bit RSA Keys

  • CHANGED
    Shut down hangs will now show the crash reporter before exiting the program

  • CHANGED
    Add-on Compatibility

  • HTML5
    Support for the ECMAScript 6 Symbol data type added

  • HTML5
    unicode-range CSS descriptor implemented

  • HTML5
    CSSOM-View scroll behavior implemented allowing smooth scrolling of content without custom libraries

  • HTML5
    object-fit and object-position implemented.
    Defines how and where the content of a replaced element is displayed

  • HTML5
    isolation CSS property implemented.
    Create a new stacking context to isolate groups of boxes to control which blend together

  • HTML5
    CSS3 will-change property implemented.
    Hints the browser of elements that will be modified. The browser will perform some performance optimization for these

  • HTML5
    Improved ES6 generators for better performance

  • HTML5
    Changed JavaScript 'const' semantics to conform better to the ES6 specification.
    The const declaration is now block-scoped and requires an initializer. It also can not be redeclared anymore.

  • DEVELOPER
    Eval sources now appear in the Debugger
    Debug JavaScript code that is evaluated dynamically, either as a string passed to eval() or as a string passed to the Function constructor

  • DEVELOPER
    DOM Promises inspection

  • DEVELOPER
    Inspector: More paste options in markup view

  • FIXED
    Various security fixes

  • FIXED
    CSS gradients work on premultiplied colors

  • FIXED
    Fix some unexpected logout from Facebook or Google after restart
Known Issues
  • UNRESOLVED
    Style Editor: Extra white space appearing above the editor for a sourcemapped scss file (1128747)

  • UNRESOLVED
    For users who removed the Share & Hello buttons, this new version brings them back unexpectedly (1136300)

  • UNRESOLVED
    Firefox Hello does not work for link generators if there is no camera installed (1106941)
 


Mozilla has released Version 36.0.3 of the Firefox browser.

What’s New
  • FIXED

    36.0.3: Security fixes for issues disclosed at HP Zero Day Initiative's Pwn2Own contest

  • NEW
    Pinned tiles on the new tab page can be synced

  • NEW
    Support for the full HTTP/2 protocol. HTTP/2 enables a faster, more scalable, and more responsive web.

  • NEW
    Locale added: Uzbek (uz)

  • CHANGED
    -remote option removed

  • CHANGED
    No longer accept insecure RC4 ciphers whenever possible

  • CHANGED
    Phasing out Certificates with 1024-bit RSA Keys

  • CHANGED
    Shut down hangs will now show the crash reporter before exiting the program

  • CHANGED
    Add-on Compatibility

  • HTML5
    Support for the ECMAScript 6 Symbol data type added

  • HTML5
    unicode-range CSS descriptor implemented

  • HTML5
    CSSOM-View scroll behavior implemented allowing smooth scrolling of content without custom libraries

  • HTML5
    object-fit and object-position implemented.
    Defines how and where the content of a replaced element is displayed

  • HTML5
    isolation CSS property implemented.
    Create a new stacking context to isolate groups of boxes to control which blend together

  • HTML5
    CSS3 will-change property implemented.
    Hints the browser of elements that will be modified. The browser will perform some performance optimization for these

  • HTML5
    Improved ES6 generators for better performance

  • HTML5
    Changed JavaScript 'const' semantics to conform better to the ES6 specification.
    The const declaration is now block-scoped and requires an initializer. It also can not be redeclared anymore.

  • DEVELOPER
    Eval sources now appear in the Debugger
    Debug JavaScript code that is evaluated dynamically, either as a string passed to eval() or as a string passed to the Function constructor

  • DEVELOPER
    DOM Promises inspection

  • DEVELOPER
    Inspector: More paste options in markup view

  • FIXED
    36.0.1 - Hello may become inactive until restart (1137469)

  • FIXED
    36.0.1 - Print preferences may not be preserved (1136855)

  • FIXED
    36.0.1 - Hello contact tabs may not be visible (1137141)

  • FIXED
    36.0.1 - Disable the usage of the ANY DNS query type (1093983)

  • FIXED
    36.0.1 - Fixed a startup crash with EMET (1137050)

  • FIXED
    36.0.1 - WebGL may use significant memory with Canvas2d (1137251)

  • FIXED
    36.0.1 - Accept hostnames that include an underscore character ("_") (1136616)

  • FIXED
    36.0.1 - Option -remote has been restored (1080319)

  • FIXED
    36.0.1 - Fix a top crash

  • FIXED
    Various security fixes

  • FIXED
    CSS gradients work on premultiplied colors

  • FIXED
    Fix some unexpected logout from Facebook or Google after restart
Known Issues
  • UNRESOLVED
    Style Editor: Extra white space appearing above the editor for a sourcemapped scss file (1128747)

  • UNRESOLVED
    For users who removed the Share & Hello buttons, this new version brings them back unexpectedly (1136300)

  • UNRESOLVED
    Firefox Hello does not work for link generators if there is no camera installed (1106941)
 


Mozilla has released Version 36.0.4 of the Firefox browser.

What’s New
  • FIXED

    36.0.4: Security fixes for issues disclosed at HP Zero Day Initiative's Pwn2Own contest

  • NEW
    Pinned tiles on the new tab page can be synced

  • NEW
    Support for the full HTTP/2 protocol. HTTP/2 enables a faster, more scalable, and more responsive web.

  • NEW
    Locale added: Uzbek (uz)

  • CHANGED
    No longer accept insecure RC4 ciphers whenever possible

  • CHANGED
    Phasing out Certificates with 1024-bit RSA Keys

  • CHANGED
    Shut down hangs will now show the crash reporter before exiting the program

  • CHANGED
    Add-on Compatibility

  • HTML5
    Support for the ECMAScript 6 Symbol data type added

  • HTML5
    unicode-range CSS descriptor implemented

  • HTML5
    CSSOM-View scroll behavior implemented allowing smooth scrolling of content without custom libraries

  • HTML5
    object-fit and object-position implemented.
    Defines how and where the content of a replaced element is displayed

  • HTML5
    isolation CSS property implemented.
    Create a new stacking context to isolate groups of boxes to control which blend together

  • HTML5
    CSS3 will-change property implemented.
    Hints the browser of elements that will be modified. The browser will perform some performance optimization for these

  • HTML5
    Improved ES6 generators for better performance

  • HTML5
    Changed JavaScript 'const' semantics to conform better to the ES6 specification.
    The const declaration is now block-scoped and requires an initializer. It also can not be redeclared anymore.

  • DEVELOPER
    Eval sources now appear in the Debugger
    Debug JavaScript code that is evaluated dynamically, either as a string passed to eval() or as a string passed to the Function constructor

  • DEVELOPER
    DOM Promises inspection

  • DEVELOPER
    Inspector: More paste options in markup view

  • FIXED
    36.0.3: Security fixes for issues disclosed at HP Zero Day Initiative's Pwn2Own contest

  • FIXED
    36.0.1 - Hello may become inactive until restart (1137469)

  • FIXED
    36.0.1 - Print preferences may not be preserved (1136855)

  • FIXED
    36.0.1 - Hello contact tabs may not be visible (1137141)

  • FIXED
    36.0.1 - Disable the usage of the ANY DNS query type (1093983)

  • FIXED
    36.0.1 - Fixed a startup crash with EMET (1137050)

  • FIXED
    36.0.1 - WebGL may use significant memory with Canvas2d (1137251)

  • FIXED
    36.0.1 - Accept hostnames that include an underscore character ("_") (1136616)

  • FIXED
    36.0.1 - Option -remote has been restored (1080319)

  • FIXED
    36.0.1 - Fix a top crash

  • FIXED
    Various security fixes

  • FIXED
    CSS gradients work on premultiplied colors

  • FIXED
    Fix some unexpected logout from Facebook or Google after restart
Known Issues
  • UNRESOLVED
    Style Editor: Extra white space appearing above the editor for a sourcemapped scss file (1128747)

  • UNRESOLVED
    For users who removed the Share & Hello buttons, this new version brings them back unexpectedly (1136300)

  • UNRESOLVED
    Firefox Hello does not work for link generators if there is no camera installed (1106941)
 


Changelog for Version 37.0
What’s New
  • NEW
    Heartbeat user rating system - your feedback about Firefox

  • NEW
    Yandex set as default search provider for the Turkish locale

  • NEW
    Bing search now uses HTTPS for secure searching

  • NEW
    Improved protection against site impersonation via OneCRL centralized certificate revocation

  • NEW
    Opportunistically encrypt HTTP traffic where the server supports HTTP/2 AltSvc

  • CHANGED
    Disabled insecure TLS version fallback for site security

  • CHANGED
    Extended SSL error reporting for reporting non-certificate errors

  • CHANGED
    TLS False Start optimization now requires a cipher suite using AEAD construction

  • CHANGED
    Improved certificate and TLS communication security by removing support for DSA

  • CHANGED
    Improved performance of WebGL rendering on Windows

  • HTML5
    Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube (Windows Vista or later only)

  • HTML5
    Added support for CSS display:contents

  • HTML5
    IndexedDB now accessible from worker threads

  • HTML5
    New SDP/JSEP implementation in WebRTC

  • DEVELOPER
    Link Removed

  • DEVELOPER
    New Inspector animations panel to control element animations

  • DEVELOPER
    New Security Panel included in Network Panel

  • DEVELOPER
    Debugger panel support for chrome:// and about:// URIs

  • DEVELOPER
    Added logging of weak ciphers to the web console

  • FIXED
    Various security fixes
ref:
https://www.mozilla.org/en-US/firefox/37.0/releasenotes/
 


Mozilla has released Version 37.0.1 of the Firefox browser.
What’s New
  • Reference: Link Removed

  • CHANGED
    Disabled HTTP/2 AltSvc

  • FIXED
    Start-up crash due to graphics hardware and third party software

  • FIXED
    Various security fixes
 


Mozilla has released Version 38.0 of the Firefox browser.

Firefox Notes
Version 38.0, first offered to Release channel users on May 12, 2015
What’s New
  • NEW
    New tab-based preferences

  • NEW
    Ruby annotation support

  • NEW
    Base for the next ESR release.

  • CHANGED
    autocomplete=off is no longer supported for username/password fields

  • CHANGED
    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

  • CHANGED
    RegExp.prototype.source now returns "(?:)" instead of the empty string for empty regular expressions

  • CHANGED
    Improved page load times via speculative connection warmup

  • HTML5
    WebSocket now available in Web Workers

  • HTML5
    BroadcastChannel API implemented

  • HTML5
    Implemented srcset attribute and <picture> element for responsive images

  • HTML5
    Implemented DOM3 Events KeyboardEvent.code

  • HTML5
    Mac OS X: Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube

  • HTML5
    Implemented Encrypted Media Extensions (EME) API to support encrypted HTML5 video/audio playback (Windows Vista or later only)

  • HTML5
    Automatically download Adobe Primetime Content Decryption Module (CDM) for DRM playback through EME (Windows Vista or later only)

  • DEVELOPER
    Optimized-out variables are now visible in Debugger UI

  • DEVELOPER
    XMLHttpRequest logs in the web console are now visually labelled and can be filtered separately from regular network requests

  • DEVELOPER
    WebRTC now has multistream and renegotiation support

  • DEVELOPER
    copy command added to console

  • FIXED
    Various security fixes
 


Mozilla has released Version 38.0.1 of the Firefox browser.

What’s New


  • Reference: Release notes for Firefox 38.0
  • FIXED
    Systems with first generation NVidia Optimus graphics cards may crash on start-up

  • FIXED
    Users who import cookies from Google Chrome can end up with broken websites

  • FIXED
    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)

  • FIXED
    Large animated images may fail to play and may stop other images from loading
Known Issues
  • UNRESOLVED
    Responsive images do not update when the enclosing viewport changes
 


Mozilla has released Version 38.0.5 of the Firefox browser.

What’s New


  • Reference: Release notes for Firefox 38.0.1
  • NEW
    Keep track of articles and videos with Pocket

  • NEW
    Clean formatting for articles and blog posts with Reader View

  • NEW
    Share the active tab or window in a Hello conversation

  • FIXED
    A race condition that would cause Firefox to stop painting when switching tabs (bug 1067470)

  • FIXED
    Fixed graphics performance when using the built-in VGA driver on Windows 7 (Bug 1165732)
Known Issues
  • UNRESOLVED
    Responsive images do not update when the enclosing viewport changes
 


Mozilla has released Version 39.0 of the Firefox browser.
What’s New
  • NEW
    Share Hello URLs with social networks

  • NEW
    Project Silk: Smoother animation and scrolling (Mac OS X)

  • NEW
    Support for 'switch' role in ARIA 1.1 (web accessibility)

  • NEW
    SafeBrowsing malware detection lookups enabled for downloads (Mac OS X and Linux)

  • NEW
    Support for new Unicode 8.0 skin tone emoji

  • CHANGED
    Removed support for insecure SSLv3 for network communications

  • CHANGED
    Disable use of RC4 except for temporarily whitelisted hosts

  • CHANGED
    The malware detection service for downloads now covers common Mac file types (Bug 1138721)

  • CHANGED
    Performance of displaying dashed lines is improved (Mac OS X) (Bug 1123019)

  • HTML5
    List-style-type now accepts a string value

  • HTML5
    Enable the Fetch API for network requests from dedicated, shared and service workers

  • HTML5
    Cascading of CSS transitions and animations now matches the current spec

  • HTML5
    Implement <link rel="preconnect">allowing anticipation of a future connection without revealing any information

  • HTML5
    Added support for Link Removed

  • DEVELOPER
    Drag and drop enabled for nodes in Inspector markup view

  • DEVELOPER
    Webconsole input history persists even after closing the toolbox

  • DEVELOPER
    Cubic bezier tooltip now shows a gallery of timing-function presets for use with CSS animations

  • DEVELOPER
    localhost is now available offline for WebSocket connections

  • FIXED
    Improve performance for IPv6 fallback to IPv4

  • FIXED
    Fix incomplete downloads being marked as complete by detecting broken HTTP1.1 transfers

  • FIXED
    The Security state indicator on a page now correctly ignores loads caused by previous pages

  • FIXED
    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

  • FIXED
    Update to Link Removed

  • FIXED
    Various security fixes
 


Mozilla has released Version 40.0 of the Firefox browser.

Firefox Notes
Version 40.0, first offered to Release channel users on August 11, 2015


Check out "What’s New" and "Known Issues" for this version of Firefox below. As always, you’re encouraged to tell us what you think, or file a bug in Bugzilla. If interested, please see the Link Removed in this release.

We'd also like to extend a special thank you to all of the new Mozillians who contributed to this release of Firefox!



What’s New
  • NEW
    Support for Windows 10

  • NEW
    Added protection against unwanted software downloads

  • NEW
    User can receive suggested tiles in the new tab page based on categories Firefox matches to browsing history (en-US only).

  • NEW
    Hello allows adding a link to conversations to provide context on what the conversation will be about

  • NEW
    New style for add-on manager based on the in-content preferences style

  • NEW
    Improved scrolling, graphics, and video playback performance with off main thread compositing (GNU/Linux only)

  • NEW
    Graphic blocklist mechanism improved: Firefox version ranges can be specified, limiting the number of devices blocked

  • CHANGED
    Add-on extensions that are not signed by Mozilla willdisplay a warning

  • CHANGED
    NPAPI Plug-in performance improved via asynchronous initialization

  • CHANGED
    Smoother animation and scrolling with hardware vsync(Windows only)

  • CHANGED
    JPEG images use less memory when scaled and can be painted faster

  • CHANGED
    Sub-resources Link Removed, thus protecting users from inadvertently disclosing login data

  • HTML5
    IndexedDB transactions are now non-durable by default

  • HTML5
    Implemented AudioBufferSourceNode.detune to modulate playback rate in cents, a logarithmic unit of measure used for musical intervals

  • DEVELOPER
    Improved Performance tools in the developer tools:Waterfall view, Call Tree view and a Flame Chart view

  • DEVELOPER
    New rules view tooltip in the Inspector to tweak CSS Filter values

  • DEVELOPER
    Console API messages from SharedWorker and ServiceWorker are now displayed in web console

  • DEVELOPER
    New page ruler highlighting tool that displays lightweight horizontal and vertical rules on a page

  • DEVELOPER
    Inspector now searches across all content frames in a page

  • FIXED
    Kannada text does not display properly in built-in pdf viewer

  • FIXED
    Various security fixes
Known Issues
  • UNRESOLVED
    If Firefox is restarted from an add-on install notification, on-going private browsing downloads might be canceled without warning (1185294)
 


Mozilla has released Version 40.0.2 of the Firefox browser.
What’s New
  • Reference: Release notes for Firefox 40.0

  • NEW
    Enabled API allowing Windows 10 users to open settings dialog (1193196)

  • FIXED
    mozalloc.lib was missing from the xulrunner package (1168291)

  • FIXED
    Fix a startup crash with some combination of hardware and drivers (1160295)
 


Mozilla has released Version 40.0.3 of the Firefox browser.
What’s New
  • Reference: Release notes for Firefox 40.0.2

  • CHANGED
    Disable the asynchronous plugin initialization (1198590)

  • FIXED
    Fix a segmentation fault in the GStreamer support (GNU/Linux) (1145230)

  • FIXED
    Fix a startup crash when using DisplayLink (Windows Only) (1195844)

  • FIXED
    Fix a regression with some Japanese fonts used in the <input> field (1194055)

  • FIXED
    On some sites, the selection in a select combox box using the mouse could be broken (1194733)

  • FIXED
    Some search partner codes were missing (1195683)

  • FIXED
    Various security fixes
 


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