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Firefox Full Change Log

Firefox 21.0 released May 14, 2013 (New Release)
# NEW The Social API now supports multiple providers
# NEW Enhanced three-state UI for Do Not Track (DNT)
# NEW Firefox will suggest how to improve your application startup time if needed
# NEW Preliminary implementation of Firefox Health Report
# CHANGED Ability to restore removed thumbnails on New Tab Page
# CHANGED CSS -moz-user-select:none selection changed to improve compatibility with -webkit-user-select:none (bug 816298)
# CHANGED Graphics related performance improvements (bug 809821)
# CHANGED Removed E4X support from Spidermonkey
# DEVELOPER Implemented Remote Profiling
# DEVELOPER Integrated add-on SDK loader and API libraries into Firefox
# HTML5 Added support for <main> element
# HTML5 Implemented scoped stylesheets
# FIXED Some function keys may not work when pressed (833719)
# FIXED Browsing and Download history clearing needs unification to avoid confusion on clearing download history (847627)
Firefox 20.0.1 released Apr 11, 2013 (New Release)
* FIXED 20.0.1 - Windows-only update to handle issues around handling UNC paths (see bug 846848)
* NEW Per-window Private Browsing. Learn more.
* NEW New download experience. Learn more.
* NEW Ability to close hanging plugins, without the browser hanging
* CHANGED Continued performance improvements around common browser tasks (page loads, downloads, shutdown, etc.)
* DEVELOPER Continued implementation of draft ECMAScript 6 - clear() and Math.imul
* DEVELOPER New JavaScript Profiler tool
* HTML5 getUserMedia implemented for web access to the user's camera and microphone (with user permission)
* HTML5 <canvas> now supports blend modes
* HTML5 Various <audio> and <video> improvements
* FIXED 20.0.1: Security fixes can be found here
* FIXED Details button on Crash Reporter (793972)
* FIXED Unity plugin doesn't display in HiDPI mode (829284)
Firefox 20.0 released Apr 2, 2013 (New Release)
* FIXED 20.0: Security fixes can be found here
* NEW Per-window Private Browsing. Learn more.
* NEW New download experience. Learn more.
* NEW Ability to close hanging plugins, without the browser hanging
* CHANGED Continued performance improvements around common browser tasks (page loads, downloads, shutdown, etc.)
* DEVELOPER Continued implementation of draft ECMAScript 6 - clear() and Math.imul
* DEVELOPER New JavaScript Profiler tool
* HTML5 getUserMedia implemented for web access to the user's camera and microphone (with user permission)
* HTML5 <canvas> now supports blend modes
* HTML5 Various <audio> and <video> improvements
* FIXED Details button on Crash Reporter (793972)
* FIXED Unity plugin doesn't display in HiDPI mode (829284)
# UnresolvedIf you try to start Firefox using a locked profile, it will crash (see 573369)
Firefox 19.0.2 released Mar 7, 2013 (New Release)
# FIXED 19.0.2: Security-driven release, see details in the associated security advisory
# FIXED 19.0.1 (Windows 8 only): Fixed stability issue for some AMD Radeon HD graphics cards
# NEW Built-in PDF viewer
# CHANGED Canvas elements can export their content as an image blob using canvas.toBlob()
# CHANGED Startup performance improvements (bugs 715402 and 756313)
# DEVELOPER Debugger now supports pausing on exceptions and hiding non-enumerable properties
# DEVELOPER Remote Web Console is available for connecting to Firefox on Android or Firefox OS (experimental, set devtools.debugger.remote-enabled to true)
# DEVELOPER There is now a Browser Debugger available for add-on and browser developers (experimental, set devtools.chrome.enabled to true)
Firefox 19.0 released Feb 19, 2013 (New Release)
# NEW Built-in PDF viewer
# CHANGEDC anvas elements can export their content as an image blob using canvas.toBlob()
# CHANGED Startup performance improvements (bugs 715402 and 756313)
# DEVELOPER Debugger now supports pausing on exceptions and hiding non-enumerable properties
# DEVELOPER Remote Web Console is available for connecting to Firefox on Android or Firefox OS (experimental, set devtools.debugger.remote-enabled to true)
# DEVELOPER There is now a Browser Debugger available for add-on and browser developers (experimental, set devtools.chrome.enabled to true)
# DEVELOPER Web Console CSS links now open in the Style Editor
# HTML5 CSS @page is now supported
# HTML5 CSS viewport-percentage length units implemented (vh, vw, vmin and vmax)
# HTML5 CSS text-transform now supports full-width
# FIXED Certain valid WebGL drawing operations are incorrectly rejected, leaving incomplete rendering in affected pages (825205)
Firefox 18.0.2 released Feb 5, 2013 (New Release)
* FIXED 18.0.2: Fix JavaScript related stability issues
* FIXED 18.0.1: Problems involving HTTP Proxy Transactions (Associated bugs)
* FIXED 18.0.1: Unity player crashes on Mac OS X (bug 828954)
* FIXED 18.0.1: Disabled HIDPI support when using external monitors to avoid rendering glitches (bug 814434)
* NEW Faster JavaScript performance via IonMonkey compiler
* NEW Support for Retina Display on OS X 10.7 and up
* NEW Preliminary support for WebRTC
* CHANGED Experience better image quality with our new HTML scaling algorithm
* CHANGED Performance improvements around tab switching
* DEVELOPER Support for new DOM property window.devicePixelRatio
* DEVELOPER Improvement in startup time through smart handling of signed extension certificates
* HTML5 Support for W3C touch events implemented, taking the place of MozTouch events
Firefox 18.0.1 released Jan 18, 2013 (New Release)
* FIXED 18.0.1: Problems involving HTTP Proxy Transactions (Associated bugs)
* FIXED 18.0.1: Unity player crashes on Mac OS X (bug 828954)
* FIXED 18.0.1: Disabled HIDPI support on external monitors to avoid rendering glitches (bug 814434)
* NEW Faster JavaScript performance via IonMonkey compiler
* NEW Support for Retina Display on OS X 10.7 and up
* NEW Preliminary support for WebRTC
* CHANGED Experience better image quality with our new HTML scaling algorithm
* CHANGED Performance improvements around tab switching
* DEVELOPER Support for new DOM property window.devicePixelRatio
* DEVELOPER Improvement in startup time through smart handling of signed extension certificates
* HTML5 Support for W3C touch events implemented, taking the place of MozTouch events
* FIXED Disable insecure content loading on HTTPS pages (62178)
Firefox 18.0 released Jan 8, 2013 (New Release)
* NEW Faster JavaScript performance via IonMonkey compiler
* NEW Support for Retina Display on OS X 10.7 and up
* NEW Preliminary support for WebRTC
* CHANGED Experience better image quality with our new HTML scaling algorithm
* CHANGED Performance improvements around tab switching
* DEVELOPER Support for new DOM property window.devicePixelRatio
* DEVELOPER Improvement in startup time through smart handling of signed extension certificates
* HTML5 Support for W3C touch events implemented, taking the place of MozTouch events
* FIXED Disable insecure content loading on HTTPS pages (62178)
* FIXED Improved responsiveness for users on proxies (769764)
# UnresolvedCertain valid WebGL drawing operations are incorrectly rejected, leaving incomplete rendering in affected pages (see 825205)
# UnresolvedIf you try to start Firefox using a locked profile, it will crash (see 573369)
Firefox 17.0.1 released Nov 30, 2012 (New Release)
# FIXED 17.0.1: Font rendering issue in Firefox 17.0 (bug 814101)
# FIXED 17.0.1: Reverted user agent change causing some website incompatibilities
# NEW First revision of the Social API and support for Facebook Messenger
# NEW Click-to-play blocklisting implemented to prevent vulnerable plugin versions from running without the user's permission (see blog post)
# CHANGED Updated Awesome Bar experience with larger icons
# CHANGED Mac OS X 10.5 is no longer supported
# DEVELOPER JavaScript Maps and Sets are now iterable
# DEVELOPER SVG FillPaint and StrokePaint implemented
# DEVELOPER Improvements that make the Web Console, Debugger and Developer Toolbar faster and easier to use
# DEVELOPER New Markup panel in the Page Inspector allows easy editing of the DOM
# HTML5 Sandbox attribute for iframes implemented, enabling increased security
# FIXED Over twenty performance improvements, including fixes around the New Tab page
Firefox 17.0 released Nov 20, 2012 (New Release)
* NEW First revision of the Social API and support for Facebook Messenger
* NEW Click-to-play blocklisting implemented to prevent vulnerable plugin versions from running without the user's permission (see blog post)
* CHANGED Updated Awesome Bar experience with larger icons
* CHANGED Mac OS X 10.5 is no longer supported
* DEVELOPER JavaScript Maps and Sets are now iterable
* DEVELOPER SVG FillPaint and StrokePaint implemented
* DEVELOPER Improvements that make the Web Console, Debugger and Developer Toolbar faster and easier to use
* DEVELOPER New Markup panel in the Page Inspector allows easy editing of the DOM
* HTML5 Sandbox attribute for iframes implemented, enabling increased security
* FIXED Over twenty performance improvements, including fixes around the New Tab page
* FIXED Pointer lock doesn't work in web apps (769150)

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