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Version history for Mozilla Firefox
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Changes for v21.0 - v21.0
- 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
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)
- FIXED 21.0: Security fixes can be found here
Changes for v20.0 - v20.0.1
- 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
Changes for v19.0.2 - v20.0
- 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
Changes for v20.0 Beta 4 - v20.0 Beta 5
- What’s New
- NEW: Per-window Private Browsing
- NEW: New download experience
- NEW: Ability to close hanging plugins, without the browser hanging
- NEW: Firefox will offer to reset the Awesomebar search provider, if it has been changed by third-party software or through about:config
- 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:
Changes for v20.0 Beta 3 - v20.0 Beta 4
- What’s New
- NEW: Per-window Private Browsing
- NEW: New download experience
- NEW: Ability to close hanging plugins, without the browser hanging
- NEW: Firefox will offer to reset the Awesomebar search provider, if it has been changed by third-party software or through about:config
- 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:
Changes for v20.0 Beta 2 - v20.0 Beta 3
- What’s New
- NEW. Per-window Private Browsing
- NEW. New download experience
- NEW. Ability to close hanging plugins, without the browser hanging
- NEW. Firefox will offer to reset the Awesomebar search provider, if it has been changed by third-party software or through about:config
- 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.
Changes for v20.0 Beta 1 - v20.0 Beta 2
- What’s New
- NEW. Per-window Private Browsing
- NEW. New download experience
- NEW. Ability to close hanging plugins, without the browser hanging
- NEW. Firefox will offer to reset the Awesomebar search provider, if it has been changed by third-party software or through about:config
- 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.
Changes for v19.0 - v19.0.1
- What’s New
- FIXED. 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. ebugger 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)
- FIXED. Starting Firefox with -private flag incorrectly claims you are not in Private Browsing mode (802274)
- FIXED. Plugins stop rendering when the top half of the plugin is scrolled off the top of the page, in HiDPI mode (825734)
- Known Issues
- Unresolved. If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved. For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved. Mootools 1.2.x incompatible with Firefox 18 and newer.Fixed in Mootools 1.3 and newer (see 789036)
- Unresolved. Some function keys may not work when pressed (see 833719)
Changes for v18.0.2 - v19.0
- Built-in PDF viewer
- Canvas elements can export their content as an image blob using canvas.toBlob()
- Startup performance improvements (bugs 715402 and 756313)
- Debugger now supports pausing on exceptions and hiding non-enumerable properties
- Remote Web Console is available for connecting to Firefox on Android or Firefox OS (experimental, set devtools.debugger.remote-enabled to true)
- There is now a Browser Debugger available for add-on and browser developers (experimental, set devtools.chrome.enabled to true)
- Web Console CSS links now open in the Style Editor
- CSS @page is now supported
- CSS viewport-percentage length units implemented (vh, vw, vmin and vmax)
- CSS text-transform now supports full-width
- Certain valid WebGL drawing operations are incorrectly rejected, leaving incomplete rendering in affected pages (825205)
- Starting Firefox with -private flag incorrectly claims you are not in Private Browsing mode (802274)
- Plugins stop rendering when the top half of the plugin is scrolled off the top of the page, in HiDPI mode (825734)
Changes for v19.0 Beta 4 - v19.0 Beta 5
- What’s New
- NEW. Built-in PDF viewer
- NEW. Firefox will offer to reset the Awesomebar search provider, if it has been changed by third-party software or through about:config
- 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)
- 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. Starting Firefox with -private flag incorrectly claims you are not in Private Browsing mode (802274)
- Known Issues
- Unresolved. Certain valid WebGL drawing operations are incorrectly rejected, leaving incomplete rendering in affected pages (see 825205)
- Unresolved. If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved. For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved. Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)
- Unresolved. Plugins stop rendering when the top half of the plugin is scrolled off the top of the page, in HiDPI mode (see 825734)
Changes for v19.0 Beta 3 - v19.0 Beta 4
- What’s New
- NEW. Built-in PDF viewer
- NEW. Firefox will offer to reset the Awesomebar search provider, if it has been changed by third-party software or through about:config
- 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)
- 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. Starting Firefox with -private flag incorrectly claims you are not in Private Browsing mode (802274)
- Known Issues
- Unresolved. Certain valid WebGL drawing operations are incorrectly rejected, leaving incomplete rendering in affected pages (see 825205)
- Unresolved. If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved. For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved. Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)
- Unresolved. Plugins stop rendering when the top half of the plugin is scrolled off the top of the page, in HiDPI mode (see 825734)
Changes for v18.0 - v18.0.1
- What’s New
- 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)
- FIXED Improved responsiveness for users on proxies (769764)
- Known Issues
- Unresolved. If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved. For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved. Animated Personas or Themes now require a workaround. See this support page
- Unresolved. Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)
- Unresolved. Mootools 1.2.x incompatible with Firefox 18 and newer.Fixed in Mootools 1.3 and newer (see 789036)
- Unresolved. Starting Firefox with -private flag incorrectly claims you are not in Private Browsing mode (see 802274)
- Unresolved. Certain valid WebGL drawing operations are incorrectly rejected, leaving incomplete rendering in affected pages (see 825205)
- Unresolved. Plugins stop rendering when the top half of the plugin is scrolled off the top of the page, in HiDPI mode (see 825734)
Changes for v17.0.1 - v18.0
- 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)
Changes for v17.0 - v17.0.1
- FIXED: 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
- FIXED: 17.0.1: Leaving Private Browsing with Social API enabled should reset social components (814554)
- FIXED: Pointer lock doesn't work in web apps (769150)
- FIXED: Page crolling on sites with fixed headers (780345)
Changes for v17.0 Beta 4 - v17.0 Beta 5
- What’s New
- NEW: Click-to-play blocklisting implemented to prevent vulnerable plugin versions from running without the user's permission (see blog post)
- NEW: Mac OS X 10.8: Support for Notification Center
- CHANGED: Updated Awesome Bar experience with larger icons
- 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)
- FIXED: Page scrolling on sites with fixed headers (780345)
- Known Issues
- Unresolved: If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved: For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved: Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)
Changes for v17.0 Beta 3 - v17.0 Beta 4
- What’s New
- NEW: Click-to-play blocklisting implemented to prevent vulnerable plugin versions from running without the user's permission (see blog post)
- NEW: Mac OS X 10.8: Support for Notification Center
- CHANGED: Updated Awesome Bar experience with larger icons
- 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)
- FIXED: Page scrolling on sites with fixed headers (780345)
- Known Issues
- Unresolved: If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved: For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved: Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)
Changes for v16.0.1 - v17.0 Beta 1
- What’s New
- NEW. Mac OS X 10.8: Support for Notification Center
- CHANGED. Updated Awesome Bar experience with larger icons
- DEVELOPER. JavaScript Maps and Sets are now iterable
- DEVELOPER. SVG FillPaint and StrokePaint implemented
- DEVELOPER. Support for @supports added
- 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. Page scrolling on sites with fixed headers (see 780345)
- Known Issues
- Unresolved. If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved. For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved. Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)
- Unresolved. Pointer lock doesn't work in web apps (see 769150)
Changes for v16.0.2 - v16.0.2
- Critical: Vulnerability can be used to run attacker code and install software, requiring no user interaction beyond normal browsing.
- High: Vulnerability can be used to gather sensitive data from sites in other windows or inject data or code into those sites, requiring no more than normal browsing actions.
- Moderate: Vulnerabilities that would otherwise be High or Critical except they only work in uncommon non-default configurations or require the user to perform complicated and/or unlikely steps.
- Low: Minor security vulnerabilities such as Denial of Service attacks, minor data leaks, or spoofs. (Undetectable spoofs of SSL indicia would have "High" impact because those are generally used to steal sensitive data intended for other sites.)
Changes for v16.0 - v16.0.1
- FIXED: The vulnerability could allow a malicious site to potentially determine which websites users have visited and have access to the URL or URL parameters. At this time we have no indication that this vulnerability is currently being exploited in the wild.
Changes for v16.0 Beta 4 - v16.0 Beta 5
- What’s New
- NEW. Firefox on Mac OS X now has preliminary VoiceOver support turned on by default
- NEW. Initial web app support (Windows/Mac/Linux)
- NEW. Acholi localization added
- CHANGED. Improvements around JavaScript responsiveness through incremental garbage collection
- DEVELOPER. New Developer Toolbar with buttons for quick access to tools, error count for the Web Console, and a new command line for quick keyboard access
- DEVELOPER. CSS3 Animations, Transitions, Transforms and Gradients unprefixed in Firefox 16
- DEVELOPER. Recently opened files list in Scratchpad implemented
- FIXED. Debugger breakpoints do not catch on page reload (783393)
- FIXED. No longer supporting MD5 as a hash algorithm in digital signatures (650355)
- FIXED. Opus support by default (772341)
- FIXED. Reverse animation direction has been implemented (655920)
- FIXED. Per tab reporting in about:memory (687724)
- FIXED. User Agent strings for pre-release Firefox versions now show only major version (728831)
- Known Issues
- Unresolved. If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved. For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved. Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)
- Unresolved. Pointer lock doesn't work in web apps (see 769150)
Changes for v14.0 Beta 12 - v14.0.1
- What’s New
- NEW. Google searches now utilize HTTPS
- NEW. Full screen support for Mac OS X Lion implemented
- NEW. Plugins can now be configured to only load on click (requires an about:config change)
- NEW. The Awesome Bar now auto-completes typed URLs
- CHANGED. Improved site identity manager, to prevent spoofing of an SSL connection with favicons
- DEVELOPER. Pointer Lock API implemented
- DEVELOPER. New API to prevent your display from sleeping
- DEVELOPER. New text-transform and font-variant CSS improvements for Turkic languages and Greek
- FIXED. Various security fixes
- FIXED. GIF animation can gets stuck when src and image size are changed (743598)
- FIXED. OS X: nsCocoaWindow::ConstrainPosition uses wrong screen in multi-display setup (752149)
- FIXED. CSS :hover regression when an element's class name is set by Javascript (758885)
- Known Issues
- Unresolved. If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved. For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved. Focus rings keep growing when repeatedly tabbing through elements (see 720987)
- Unresolved. Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)
Changes for v14.0 Beta 11 - v14.0 Beta 12
- What’s New
- NEW. Google searches now utilize HTTPS
- NEW. Full screen support for Mac OS X Lion implemented
- NEW. Plugins can now be configured to only load on click (requires an about:config change)
- NEW. The Awesome Bar now auto-completes typed URLs
- CHANGED. Improved site identity manager, to prevent spoofing of an SSL connection with favicons
- DEVELOPER. Pointer Lock API implemented
- DEVELOPER. New API to prevent your display from sleeping
- DEVELOPER. New text-transform and font-variant CSS improvements for Turkic languages and Greek
- FIXED. OS X: nsCocoaWindow::ConstrainPosition uses wrong screen in multi-display setup (752149)
- FIXED. CSS :hover regression when an element's class name is set by Javascript (758885)
- Known Issues
- Unresolved. GIF animation can gets stuck when src and image size are changed (see 743598)
- Unresolved. If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved. For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved. Focus rings keep growing when repeatedly tabbing through elements (see 720987)
- Unresolved. Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)
Changes for v14.0 Beta 10 - v14.0 Beta 11
- What’s New
- NEW. Google searches now utilize HTTPS
- NEW. Full screen support for Mac OS X Lion implemented
- NEW. Plugins can now be configured to only load on click (requires an about:config change)
- NEW. The Awesome Bar now auto-completes typed URLs
- CHANGED. Improved site identity manager, to prevent spoofing of an SSL connection with favicons
- DEVELOPER. Pointer Lock API implemented
- DEVELOPER. New API to prevent your display from sleeping
- DEVELOPER. New text-transform and font-variant CSS improvements for Turkic languages and Greek
- FIXED. OS X: nsCocoaWindow::ConstrainPosition uses wrong screen in multi-display setup (752149)
- FIXED. CSS :hover regression when an element's class name is set by Javascript (758885)
- Known Issues
- Unresolved. GIF animation can gets stuck when src and image size are changed (see 743598)
- Unresolved. If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved. For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved. Focus rings keep growing when repeatedly tabbing through elements (see 720987)
- Unresolved. Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)
Changes for v14.0 Beta 9 - v14.0 Beta 10
- What’s New
- NEW. Google searches now utilize HTTPS
- NEW. Full screen support for Mac OS X Lion implemented
- NEW. Plugins can now be configured to only load on click (requires an about:config change)
- NEW. The Awesome Bar now auto-completes typed URLs
- CHANGED. Improved site identity manager, to prevent spoofing of an SSL connection with favicons
- DEVELOPER. Pointer Lock API implemented
- DEVELOPER. New API to prevent your display from sleeping
- DEVELOPER. New text-transform and font-variant CSS improvements for Turkic languages and Greek
- FIXED. OS X: nsCocoaWindow::ConstrainPosition uses wrong screen in multi-display setup (752149)
- FIXED. CSS :hover regression when an element's class name is set by Javascript (758885)
- Known Issues
- Unresolved. GIF animation can gets stuck when src and image size are changed (see 743598)
- Unresolved. If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved. For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved. Focus rings keep growing when repeatedly tabbing through elements (see 720987)
- Unresolved. Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)
Changes for v14.0 Beta 8 - v14.0 Beta 9
- What’s New
- NEW. Google searches now utilize HTTPS
- NEW. Full screen support for Mac OS X Lion implemented
- NEW. Plugins can now be configured to only load on click (requires an about:config change)
- NEW. The Awesome Bar now auto-completes typed URLs
- CHANGED. Improved site identity manager, to prevent spoofing of an SSL connection with favicons
- DEVELOPER. Pointer Lock API implemented
- DEVELOPER. New API to prevent your display from sleeping
- DEVELOPER. New text-transform and font-variant CSS improvements for Turkic languages and Greek
- FIXED. OS X: nsCocoaWindow::ConstrainPosition uses wrong screen in multi-display setup (752149)
- FIXED. CSS :hover regression when an element's class name is set by Javascript (758885)
- Known Issues
- Unresolved. GIF animation can gets stuck when src and image size are changed (see 743598)
- Unresolved. If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved. For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved. Focus rings keep growing when repeatedly tabbing through elements (see 720987)
- Unresolved. Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)
Changes for v14.0 Beta 6 - v14.0 Beta 7
- NEW: Google searches now utilize HTTPS
- NEW: Full screen support for Mac OS X Lion implemented
- NEW: Plugins can now be configured to only load on click (requires an about:config change)
- NEW: The Awesome Bar now auto-completes typed URLs
- CHANGED: Improved site identity manager, to prevent spoofing of an SSL connection with favicons
- DEVELOPER: Pointer Lock API implemented
- DEVELOPER: New API to prevent your display from sleeping
- DEVELOPER: New text-transform and font-variant CSS improvements for Turkic languages and Greek
- FIXED: OS X: nsCocoaWindow::ConstrainPosition uses wrong screen in multi-display setup (752149)
- FIXED: CSS :hover regression when an element's class name is set by Javascript (758885)
Changes for v13.0 - v13.0.1
- Windows Messenger did not load in Hotmail, and the Hotmail inbox did not auto-update (764546, fixed in 13.0.1)
- Hebrew text sometimes rendered incorrectly (756850, fixed in 13.0.1)
- Flash 11.3 sometimes caused a crash on quit (747683, fixed in 13.0.1)
- When opening a new tab, users are now presented with their most visited pages
- The default home page now has quicker access to bookmarks, history, settings, and more
- SPDY protocol now enabled by default for faster browsing on supported sites
- Restored background tabs are not loaded by default for faster startup
- Smooth scrolling is now enabled by default
- 72 total improvements to Page Inspector, HTML panel, Style Inspector, Scratchpad and Style Editor
- The column-fill CSS property has been implemented
- Experimental support for ECMAScript 6 Map and Set objects has been implemented
- Support for the CSS3 background-position property extended syntax has been added
- The :invalid pseudo-class can now be applied to the element
- The CSS turn
unit is now supported - Various security fixes
Changes for v13.0 Beta 3 - v13.0 Beta 4
- What?s New
- NEW When opening a new tab, users are now presented with their most visited pages
- NEW The default home page now has quicker access to bookmarks, history, settings, and more
- CHANGED SPDY protocol now enabled by default for faster browsing on supported sites
- CHANGED Restored background tabs are not loaded by default for faster startup
- CHANGED Smooth scrolling is now enabled by default
- DEVELOPER 72 total improvements to Page Inspector, HTML panel, Style Inspector, Scratchpad and Style Editor
- DEVELOPER The column-fill CSS property has been implemented
- DEVELOPER Experimental support for ECMAScript 6 Map and Set objects has been implemented
- DEVELOPER Support for the CSS3 background-position property extended syntax has been added
- DEVELOPER The :invalid pseudo-class can now be applied to the element
- DEVELOPER The CSS turn
unit is now supported - Known Issues
- Unresolved If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved Some synaptic touch pads are unable to vertical scroll (see 622410)
- Unresolved Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)
Changes for v11.0 - v12.0 Beta 6
- What?s New
- NEW: Windows: Firefox is now easier to update with one less prompt (User Account Control)
- NEW: Page Source now has line numbers
- CHANGED: Line breaks are now supported in the title attribute
- CHANGED: Improvements to "Find in Page" to center search result
- CHANGED: URLs pasted into the download manager window are now automatically downloaded
- DEVELOPER: The column-fill CSS property has been implemented
- DEVELOPER: Support for the text-align-last CSS property has been added
- DEVELOPER: Experimental support for ECMAScript 6 Map and Set objects has been implemented
- FIXED: OS X: WebGL performance may be degraded on some hardware (713305)
- Known Issues
- Unresolved: If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved: For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved: Some synaptic touch pads are unable to vertical scroll (see 622410)
- Unresolved: Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)
Changes for v12.0 Beta 2 - v12.0 Beta 3
- What?s New
- NEW. Windows: Firefox is now easier to update with one less prompt (User Account Control)
- NEW. Page Source now has line numbers
- CHANGED. Line breaks are now supported in the title attribute
- CHANGED. Improvements to "Find in Page" to center search result
- CHANGED. URLs pasted into the download manager window are now automatically downloaded
- DEVELOPER. The column-fill CSS property has been implemented
- DEVELOPER. Support for the text-align-last CSS property has been added
- DEVELOPER. Experimental support for ECMAScript 6 Map and Set objects has been implemented
- FIXED. OS X: WebGL performance may be degraded on some hardware (713305)
- Known Issues
- Unresolved. If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved. For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved. Some synaptic touch pads are unable to vertical scroll (see 622410)
- Unresolved. Windows: The use of Microsoft's System Restore functionality shortly after updating Firefox may prevent future updates (see 730285)
Changes for v10.0.2 - v11.0
- What?s New
- NEW Firefox can now migrate your bookmarks, history, and cookies from Google Chrome
- NEW With Sync enabled, add-ons can now be synchronized across your computers
- NEW The CSS text-size-adjust property is now supported
- HTML5 The outerHTML property is now supported on HTML elements
- HTML5 View source syntax highlighting now uses the HTML5 parser (see bug 482921)
- DEVELOPER The Style Editor for CSS editing is now available to web developers
- DEVELOPER Web developers can now visualize a web page in 3D using the Page Inspector 3D View
- DEVELOPER SPDY protocol support for faster page loads is now testable
- DEVELOPER XMLHttpRequest now supports HTML parsing
- DEVELOPER Files can now be stored in IndexedDB (see bug 661877)
- DEVELOPER Websockets has now been unprefixed
- FIXED Redesigned media controls for HTML5 video
- FIXED Firefox notifications may not work properly with Growl 1.3 or later (691662)
- Known Issues
- Unresolved. Two-digit browser version numbers may cause a small number of website incompatibilities (see 690287)
- Unresolved. If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved. For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved. Some synaptic touch pads are unable to vertical scroll (see 622410)
- Unresolved. Under certain conditions, scrolling and text input may be jerky (see 711900)
Changes for v11.0 Beta 5 - v11.0 Beta 6
- What?s New
- NEW Firefox can now migrate your bookmarks, history, and cookies from Google Chrome
- NEW With Sync enabled, add-ons can now be synchronized across your computers
- NEW The CSS text-size-adjust property is now supported
- HTML5 The outerHTML property is now supported on HTML elements
- HTML5 View source syntax highlighting now uses the HTML5 parser (see bug 482921)
- DEVELOPER The Style Editor for CSS editing is now available to web developers
- DEVELOPER Web developers can now visualize a web page in 3D using the Page Inspector 3D View
- DEVELOPER SPDY protocol support for faster page loads is now testable
- DEVELOPER XMLHttpRequest now supports HTML parsing
- DEVELOPER Files can now be stored in IndexedDB (see bug 661877)
- DEVELOPER Websockets has now been unprefixed
- FIXED Redesigned media controls for HTML5 video
- FIXED Firefox notifications may not work properly with Growl 1.3 or later (691662)
- Known Issues
- Unresolved. Two-digit browser version numbers may cause a small number of website incompatibilities (see 690287)
- Unresolved. If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved. For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved. Some synaptic touch pads are unable to vertical scroll (see 622410)
- Unresolved. Under certain conditions, scrolling and text input may be jerky (see 711900)
Changes for v11.0 Beta 4 - v11.0 Beta 5
- What?s New
- NEW Firefox can now migrate your bookmarks, history, and cookies from Google Chrome
- NEW With Sync enabled, add-ons can now be synchronized across your computers
- NEW The CSS text-size-adjust property is now supported
- HTML5 The outerHTML property is now supported on HTML elements
- HTML5 View source syntax highlighting now uses the HTML5 parser (see bug 482921)
- DEVELOPER The Style Editor for CSS editing is now available to web developers
- DEVELOPER Web developers can now visualize a web page in 3D using the Page Inspector 3D View
- DEVELOPER SPDY protocol support for faster page loads is now testable
- DEVELOPER XMLHttpRequest now supports HTML parsing
- DEVELOPER Files can now be stored in IndexedDB (see bug 661877)
- DEVELOPER Websockets has now been unprefixed
- FIXED Redesigned media controls for HTML5 video
- FIXED Firefox notifications may not work properly with Growl 1.3 or later (691662)
- Known Issues
- Unresolved Two-digit browser version numbers may cause a small number of website incompatibilities (see 690287)
- Unresolved If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved Some synaptic touch pads are unable to vertical scroll (see 622410)
- Unresolved Under certain conditions, scrolling and text input may be jerky (see 711900)
Changes for v11.0 Beta 3 - v11.0 Beta 4
- What?s New
- NEW Firefox can now migrate your bookmarks, history, and cookies from Google Chrome
- NEW With Sync enabled, add-ons can now be synchronized across your computers
- NEW The CSS text-size-adjust property is now supported
- HTML5 The outerHTML property is now supported on HTML elements
- HTML5 View source syntax highlighting now uses the HTML5 parser (see bug 482921)
- DEVELOPER The Style Editor for CSS editing is now available to web developers
- DEVELOPER Web developers can now visualize a web page in 3D using the Page Inspector 3D View
- DEVELOPER SPDY protocol support for faster page loads is now testable
- DEVELOPER XMLHttpRequest now supports HTML parsing
- DEVELOPER Files can now be stored in IndexedDB (see bug 661877)
- DEVELOPER Websockets has now been unprefixed
- FIXED Redesigned media controls for HTML5 video
- FIXED Firefox notifications may not work properly with Growl 1.3 or later (691662)
- Known Issues
- Unresolved Two-digit browser version numbers may cause a small number of website incompatibilities (see 690287)
- Unresolved If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved Some synaptic touch pads are unable to vertical scroll (see 622410)
- Unresolved Under certain conditions, scrolling and text input may be jerky (see 711900)
Changes for v11.0 Beta 2 - v11.0 Beta 3
- What?s New
- NEW Firefox can now migrate your bookmarks, history, and cookies from Google Chrome
- NEW With Sync enabled, add-ons can now be synchronized across your computers
- NEW The CSS text-size-adjust property is now supported
- HTML5 The outerHTML property is now supported on HTML elements
- HTML5 View source syntax highlighting now uses the HTML5 parser (see bug 482921)
- DEVELOPER The Style Editor for CSS editing is now available to web developers
- DEVELOPER Web developers can now visualize a web page in 3D using the Page Inspector 3D View
- DEVELOPER SPDY protocol support for faster page loads is now testable
- DEVELOPER XMLHttpRequest now supports HTML parsing
- DEVELOPER Files can now be stored in IndexedDB (see bug 661877)
- DEVELOPER Websockets has now been unprefixed
- FIXED Redesigned media controls for HTML5 video
- FIXED Firefox notifications may not work properly with Growl 1.3 or later (691662)
- Known Issues
- Unresolved Two-digit browser version numbers may cause a small number of website incompatibilities (see 690287)
- Unresolved If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved Some synaptic touch pads are unable to vertical scroll (see 622410)
- Unresolved Under certain conditions, scrolling and text input may be jerky (see 711900)
Changes for v10.0.1 - v10.0.2
- Fix a security issue:
- Critical: Vulnerability can be used to run attacker code and install software, requiring no user interaction beyond normal browsing.
- High: Vulnerability can be used to gather sensitive data from sites in other windows or inject data or code into those sites, requiring no more than normal browsing actions.
- Moderate: Vulnerabilities that would otherwise be High or Critical except they only work in uncommon non-default configurations or require the user to perform complicated and/or unlikely steps.
- Low: Minor security vulnerabilities such as Denial of Service attacks, minor data leaks, or spoofs. (Undetectable spoofs of SSL indicia would have "High" impact because those are generally used to steal sensitive data intended for other sites.)
Changes for v10.0 - v10.0.1
- A top startup crash (bug is security locked because it's a crash)
- Java applets cause text areas to hang (bug 718939)
Changes for v9.0.1 - v10.0
- What?s New
- NEW. The forward button is now hidden until you navigate back
- NEW. Anti-Aliasing for WebGL is now implemented (see bug 615976)
- NEW. Full Screen APIs allow you to build a web application that runs full screen (see the feature page)
- NEW. CSS3 3D-Transforms are now supported (see bug 505115)
- HTML5. New element for bi-directional text isolation, along with supporting CSS properties (see bugs 613149 and 662288)
- DEVELOPER. Inspect tool with content highlighting, includes new CSS Style Inspector
- DEVELOPER. We've added IndexedDB APIs to more closely match the specification
- FIXED. Some users may experience a crash when moving bookmarks (681795)
- Known Issues
- Unresolved. Some synaptic touch pads are unable to vertical scroll
- Unresolved. For some users, scrolling in the main GMail window will be slower than usual
- Unresolved. If you try to start Firefox using a locked profile, it will crash
- Unresolved. This version of Firefox will not work on Macintosh hardware with Power PC CPUs
- Unresolved. Under certain conditions, scrolling and text input may be jerky
- Resolved. Firefox notifications may not work properly with Growl 1.3 or later
Changes for v7.0.1 - v8.0 Beta 1
- Add-ons installed by third party programs are now disabled by default
- Added a one-time add-on selection dialog to manage previously installed add-ons
- Added Twitter to the search bar
- Added a preference to load tabs on demand, improving start-up time when windows are restored
- Improved tab animations when moving, reordering, or detaching tabs
- Improved performance and memory handling when using
Changes for v7.0 - v7.0.1
- Fixed a rare issue where some users could find one or more of their add-ons hidden after a Firefox update
Changes for v6.0.1 - v7.0 Beta 3
- Drastically improved memory use
- Added a new rendering backend to speed up Canvas operations on Windows systems
- Bookmark and password changes now sync almost instantly when using Firefox Sync
- Added support for text-overflow: ellipsis
- Added support for the Web Timing specification
- Added an opt-in system for users to send performance data back to Mozilla to improve future versions of Firefox. This can be enabled by installing an add-on
- Fixed several stability issues
Changes for v7.0 Beta 1 - v7.0 Beta 2
- Drastically improved memory use
- Added a new rendering backend to speed up Canvas operations on Windows systems
- Bookmark and password changes now sync almost instantly when using Firefox Sync
- Added support for text-overflow: ellipsis
- Added support for the Web Timing specification
- Added an opt-in system for users to send performance data back to Mozilla to improve future versions of Firefox. This can be enabled by installing an add-on
- Fixed several stability issues
Changes for v6.0.1 - v6.0.2
- The address bar now highlights the domain of the website you're visiting
- Streamlined the look of the site identity block
- Added support for the latest draft version of WebSockets with a prefixed API
- Added support for EventSource / server-sent events
- Added support for window.matchMedia
- Added Scratchpad, an interactive JavaScript prototyping environment
- Added a new Web Developer menu item and moved development-related items into it
- Improved usability of the Web Console
- Improved the discoverability of Firefox Sync
- Reduced browser startup time when using Panorama
- Fixed several stability issues
- Fixed several security issues
Changes for v6.0 - v6.0.1
- Revoked the root certificate for DigiNotar due to fraudulent SSL certificate issuance (see bug 682927 and the security advisory)
Changes for v5.0.1 - v6.0 Beta 5
- The address bar now highlights the domain of the website you're visiting
- Streamlined the look of the site identity block
- Added support for the latest draft version of WebSockets with a prefixed API
- Added support for EventSource / server-sent events
- Added support for window.matchMedia
- Added Scratchpad, an interactive JavaScript prototyping environment
- Added a new Web Developer menu item and moved development-related items into it
- Improved usability of the Web Console
- Improved the discoverability of Firefox Sync
- Reduced browser startup time when using Panorama
Changes for v5.0.1 - v6.0 Beta 3
- The address bar now highlights the domain of the website you're visiting
- Streamlined the look of the site identity block
- Added support for the latest draft version of WebSockets with a prefixed API
- Added support for EventSource / server-sent events
- Added support for window.matchMedia
- Added Scratchpad, an interactive JavaScript prototyping environment
- Added a new Web Developer menu item and moved development-related items into it
- Improved usability of the Web Console
- Improved the discoverability of Firefox Sync
- Reduced browser startup time when using Panorama
Changes for v6.0 Beta 1 - v6.0 Beta 2
- The latest version of Firefox Beta has the following changes:
- The address bar now highlights the domain of the website you're visiting
- Streamlined the look of the site identity block
- Added support for the latest draft version of WebSockets with a prefixed API
- Added support for EventSource / server-sent events
- Added support for window.matchMedia
- Added Scratchpad, an interactive JavaScript prototyping environment
- Added a new Web Developer menu item and moved development-related items into it
- Improved usability of the Web Console
- Improved the discoverability of Firefox Sync
- Reduced browser startup time when using Panorama
Changes for v5.0 - v6.0 Beta 1
- The address bar now highlights the domain of the website you're visiting
- Streamlined the look of the site identity block
- Added support for the latest draft version of WebSockets with a prefixed API
- Added support for EventSource / server-sent events
- Added support for window.matchMedia
- Added Scratchpad, an interactive JavaScript prototyping environment
- Added a new Web Developer menu item and moved development-related items into it
- Improved usability of the Web Console
- Improved the discoverability of Firefox Sync
- Reduced browser startup time when using Panorama
Changes for v5.0 - v5.0.1
- Worked around an issue in Mac OS X 10.7 that could cause Firefox to crash
- Worked around an issue caused by Apple's "Java for Mac OS X 10.6 Update 5" where the Java plugin would not be loaded
Changes for v5.0 Beta 7 - v5.0
- Added support for CSS animations
- The Do-Not-Track header preference has been moved to increase discoverability
- Tuned HTTP idle connection logic for increased performance
- Improved canvas, JavaScript, memory, and networking performance
- Improved standards support for HTML5, XHR, MathML, SMIL, and canvas
- Improved spell checking for some locales
- Improved desktop environment integration for Linux users
- WebGL content can no longer load cross-domain textures
- Background tabs have setTimeout and setInterval clamped to 1000ms to improve performance
- Fixed several stability issues
- Fixed several security issues
Changes for v5.0 Beta 5 - v5.0 Beta 7
- Added support for CSS animations
- The Do-Not-Track header preference has been moved to increase discoverability
- Improved canvas, JavaScript, memory, and networking performance
- Improved standards support for HTML5, XHR, MathML, SMIL, and canvas
- Improved spell checking for some locales
- Improved desktop environment integration for Linux users
- WebGL content can no longer load cross-domain textures
- Background tabs have setTimeout and setInterval clamped to 1000ms to improve performance
- The Firefox development channel switcher introduced in previous Firefox Beta updates has been removed
Changes for v5.0 Beta 4 - v5.0 Beta 5
- Added support for CSS animations
- Added support for switching Firefox development channels
- The Do-Not-Track header preference has been moved to increase discoverability
- Improved canvas, JavaScript, memory, and networking performance
- Improved standards support for HTML5, XHR, MathML, SMIL, and canvas
- Improved spell checking for some locales
- Improved desktop environment integration for Linux users
Changes for v5.0 Beta 2 - v5.0 Beta 3
- Added support for CSS animations
- Added support for switching Firefox development channels
- The Do-Not-Track header preference has been moved to increase discoverability
- Improved canvas, JavaScript, memory, and networking performance
- Improved standards support for HTML5, XHR, MathML, SMIL, and canvas
- Improved spell checking for some locales
- Improved desktop environment integration for Linux users
Changes for v4.0 - v4.0.1
- Firefox 4.0.1 fixes the following issues found in previous versions of Firefox 4:
- Fixed several security issues.
- Fixed several stability issues.
Changes for v4.0 RC 1 - v4.0 RC 2
- Blacklisted a few invalid HTTPS certificates
- Updated localizations for 29 locales
- Added Vietnamese localization, bringing the total languages available in Firefox 4 to 83
Changes for v4.0 Beta 12 - v4.0 RC 1
- What’s New in this Firefox 4 RC
- General stability, performance, and compatibility improvements
- As well as these features from previous Firefox 4 Betas:
- Firefox 4 RC is available in 79 languages
- Support for the proposed Do Not Track ("DNT") header
- Connection status messages are now shown in a small overlay
- WebGL is enabled on all platforms, but, like for other hardware acceleration features, many buggy drivers or driver versions are blocked
- The default homepage design has been refreshed
- Firefox no longer switches into offline mode automatically
- Overhaul of the bookmarks and history code, enabling faster bookmarking and startup performance
- Per-compartment garbage collection is now enabled, reducing work done during complex animations
- The Firefox Sync setup experience has been greatly improved across desktop and mobile devices
- Additional polish for the Firefox Add-ons Manager
- Uses JägerMonkey, a new, faster JavaScript engine
- Certain rendering operations are now hardware-accelerated using Direct3D 9 on Windows XP, Direct3D 10 on Windows Vista and 7, and OpenGL on Mac OS X
- Improved web typography using OpenType with support for ligatures, kerning and font variants
- HTML5 Forms API makes web based forms easier to implement and validate
- Support for the new proposed Audio Data API
- Direct2D Hardware Acceleration is now on by default for Windows 7 users
- Firefox button has a new look for Windows Vista and Windows 7 users
- Support for HSTS security protocol allowing sites to insist that they only be loaded over SSL
- Firefox Sync is now included by default
- A new feature gives users a visual overview of all open tabs, allowing them to be sorted and grouped
- An experimental API is included to provide more efficient Javascript animations
- Firefox now supports the HTML5 video "buffered" property
- Tabs are now on top by default on Windows, Mac OS X, and Linux
- You can turn any tab into an "App Tab" by right-clicking on it and selecting "Make into App Tab" from the context menu
- Web developers can animate content using CSS Transitions
- Responsiveness and scrolling improvements from the new retained layers layout system
- JavaScript speed improvements due to engine optimizations
- Changes to how XPCOM components are registered in order to help startup time and process separation
- You can search for and switch to already open tabs in the Smart Location Bar
- New Addons Manager and extension management API (UI will be changed before final release)
- Significant API improvements are available for JS-ctypes, a foreign function interface for extensions
- The stop and reload buttons have been merged into a single button on Windows, Mac OS X, and Linux
- The Bookmarks Toolbar has been replaced with a Bookmarks Button by default (you can switch it back if you'd like)
- Crash protection for Windows, Linux, and Mac OS X when there is a crash in the Adobe Flash, Apple Quicktime or Microsoft Silverlight plugins
- CSS Transitions are partially supported
- Full WebGL support is included
- Core Animation rendering model for plugins on Mac OS X. Plugins which also support this rendering model can now draw faster and more efficiently
- Native support for the HD HTML5 WebM video format
- Web developers can update the URL field without reloading the page using HTML History APIs
- More responsive page rendering using lazy frame construction
- Link history lookup is done asynchronously to provide better responsiveness during pageload
- CSS :visited selectors have been changed to block websites from being able to check a user's browsing history
- New HTML5 parser
- Support for more HTML5 form controls
- Web authors can now get touch events from Firefox users on Windows 7 machines
- A new way of representing values in JavaScript that allows Firefox to execute heavy, numeric code (used for things like graphics and animations) more efficiently
Changes for v4.0 Beta 11 - v4.0 Beta 12
- This release delivers improved performance and responsiveness when watching videos on your favorite video websites. We are in the final stages of the Firefox 4 Beta cycle.
Changes for v4.0 Beta 10 - v4.0 Beta 11
- Support for the proposed Do Not Track ("DNT") header
- Connection status messages are now shown in a small overlay
- WebGL has been re-enabled on Linux
- The default homepage design has been refreshed
- Firefox no longer switches into offline mode automatically
- See the complete changelist from the previous beta :
- 622594 Remove _options (OptionsClass) as a browser builtin
- 622597 form.novalidate should not be taken into account for validity UI when focusing an element
- 613383 Setting runtime JS options can override the JSVersion
- 628745 skip rounded rect clips whenever possible
- 628747 SVG-as-an-image can load resources from other domains
- 617485 "Assertion failure: global->getClass()->flags & JSCLASS_IS_GLOBAL"
- 585745 Crash [@ nsIDOMElementCSSInlineStyle_GetStyle | js::callJSPropertyOp] from MathML element with HTML …
- 623637 Can start playing too soon on live streams
- 627736 fix tab focusing after closing a group in panorama
- 169476 Bugs that annoy bugzilla users reading bugmail
- 625693 nsAccessibilityService::NotifyOfAnchorJumpTo should be processed as document notification
- 627776 sporadic layout/reftests/bugs/621253-1.xhtml | image comparison (==)
- 618541 Remove obsolete contents.rdf in official branding
- 627758 jsd.off() fails intermittently
- 625712 docShell's useGlobalHistory=false doesn't work in ff4
- 600584 Add more detail to CSP inline script violation logging
- 622259 In Yahoo Mail! Unable to activate Show Images in Spam Folder
- 622647 mozJSComponentLoader.cpp:351: warning: ‘nsresult ReadScriptFromStream(JSContext*, nsIObjectInputStre…
- 625722 Firefox freezes in Mozilla TreeWalker demo
- 628063 IndexedDB: Indexes created after data are added are sometimes improperly populated
- 117821 Fix unbalanced FIXptr pair
- 628800 VALIDATE_STATUS should always be 1 on MacOS X
- 549958 Hourly/Nightly builds should have some way to see which {comm-central|mobile-browser|camino} changes…
- 628807 Firefox button split menu sub-menus disappear immediately on mouse out of the main command, if you t…
- 614474 [Windows 2003] Intermittent "ERROR TEST-UNEXPECTED-FAIL | /tests/dom/indexedDB/test/test_bfcache.htm…
- 593421 Provide link to "Restore Previous Session" on Firefox Start
- 624483 JM: different output with testcase involving typed arrays, "Infinity"
- 629846 tab key event doesn't change focus
- 569431 Optimization in DrawElements: cache the max-in-sub-array computation
- 609372 Better icons and color palette for the Web Console
- 618590 IndexedDB: Don't put windows with active transactions into the bfcache
- 628832 The Radio Player on the web Bassdrive doesn't work on Firefox 4
- 629862 text update notification should schedule notifications processing
- 627817 Add ANGLE license to about:license
- 615530 Update .bt entry in PSL
- 627819 Broken icon in the message "The Web Console logging API has been disabled by a script on this page"
- 611440 Smart abbreviation for URLs in the Web Console
- 394353 Tag list is not updated when manually adding, renaming, or deleting tags from within the tags field
- 620658 Crash [@ libc-2.11.so + 0x326b5 ] during browser_auth.js on Linux64 mochitest-other debug
- 612470 Closing the last tab of a group switches to another group even if an app tab is selected
- 628861 Drop down menus show up in the wrong place every second time
- 627840 DirectWrite: text spacing busted for 12px and 13px Calibri
- 629889 open all in tabs is broken from Library when no browser window is open
- 628866 browser_579868.js loads about:credits, which hits the network
- 628867 browser_tabview_bug586553.js loads about:credits, which hits the network
- 617609 Upvar analysis marks functions as NULL_CLOSURE incorrectly
- 613515 JS properties set from chrome are lost
- 627858 Use gfxContextAutoSaveRestore / gfxContextMatrixAutoSaveRestore in SVGDrawingCallback::operator()
- 600215 Update Initial Developer list in about:license
- 629912 4.0b11pre crash [@ NotificationController::TextEnumerator(nsPtrHashKey
*, void*) ][@ nsI… - 628890 mochitests-2: test_bug509055.html should not call SimpleTest.finish() before it actually has
- 614555 Blurred fonts on some websites
- 611485 Passing a Location object as a string argument of a cross-origin XPConnect call fails
- 613915 [OOPP] Not enough storage is available to process this command [async plugins regression] (copy/past…
- 613541 Panorama closes browser window when closing "undo close group"
- 629933 WebGL mochitest mistakenly disabled on Mac OS 10.6
- 603311 HashMgr::load_tables leaks dict when decode_flags fails
- 623796 nsPNGDecoder.cpp:642:44: warning: passing NULL to non-pointer argument 2 of 'void MOZ_PNG_set_crc_ac…
- 579767 Frame borders are sometimes not redrawn correctly after dragging them or resizing the window
- 628922 layout should use cached nsIAccessibilityService
- 613564 layout/style/crashtests/418007-1.xhtml | assertion count 1 is more than expected 0 assertions (with …
- 629950 [@ nsIPresShell::RemoveRefreshObserverInternal(nsARefreshObserver*, mozFlushType)]
- 619713 [SeaMonkey] mochitest-browser-chrome: 192 failures due to not supporting 'let' anymore/again
- 628930 JSAutoRequest in Handle::ToJSObject is not necessary
- 410820
Changes for v4.0 Beta 9 - v4.0 Beta 10
- Compatibilty and stability improvements when using Adobe Flash on Mac OS X
- Improvements in memory usage
- Support for a graphics driver blacklist to improve stability
- See the complete changelist from the previous beta
Changes for v4.0 Beta 8 - v4.0 Beta 9
- Overhaul of the bookmarks and history code, enabling faster bookmarking and startup performance
- Per-compartment garbage collection is now enabled, reducing work done during complex animations
- See the complete changelist from the previous beta
- As well as these features from previous Firefox 4 Betas:
- Firefox 4 Beta is available in 76 languages
- The Firefox Sync setup experience has been greatly improved across desktop and mobile devices
- Speed, functionality, and compatibility improvements to WebGL
- Additional polish for the Firefox Add-ons Manager
- Uses JägerMonkey, a new, faster JavaScript engine
- Certain rendering operations are now hardware-accelerated using Direct3D 9 on Windows XP, Direct3D 10 on Windows Vista and 7, and OpenGL on Mac OS X
- Improved web typography using OpenType with support for ligatures, kerning and font variants
- HTML5 Forms API makes web based forms easier to implement and validate
- Support for the new proposed Audio Data API
- Direct2D Hardware Acceleration is now on by default for Windows 7 users
- Firefox button has a new look for Windows Vista and Windows 7 users
- Support for HSTS security protocol allowing sites to insist that they only be loaded over SSL
- Firefox Sync is now included by default
- A new feature gives users a visual overview of all open tabs, allowing them to be sorted and grouped
- An experimental API is included to provide more efficient Javascript animations
- Firefox now supports the HTML5 video "buffered" property
- Tabs are now on top by default on Windows, Mac OS X, and Linux
- You can turn any tab into an "App Tab" by right-clicking on it and selecting "Make into App Tab" from the context menu
- Web developers can animate content using CSS Transitions
- Responsiveness and scrolling improvements from the new retained layers layout system
- JavaScript speed improvements due to engine optimizations
- Changes to how XPCOM components are registered in order to help startup time and process separation
- You can search for and switch to already open tabs in the Smart Location Bar
- New Addons Manager and extension management API (UI will be changed before final release)
- Significant API improvements are available for JS-ctypes, a foreign function interface for extensions
- The stop and reload buttons have been merged into a single button on Windows, Mac OS X, and Linux
- The Bookmarks Toolbar has been replaced with a Bookmarks Button by default (you can switch it back if you'd like)
- Crash protection for Windows, Linux, and Mac OS X when there is a crash in the Adobe Flash, Apple Quicktime or Microsoft Silverlight plugins
- CSS Transitions are partially supported
- Full WebGL support is included but disabled by default at this time
- Core Animation rendering model for plugins on Mac OS X. Plugins which also support this rendering model can now draw faster and more efficiently
- Native support for the HD HTML5 WebM video format
- Web developers can update the URL field without reloading the page using HTML History APIs
- More responsive page rendering using lazy frame construction
- Link history lookup is done asynchronously to provide better responsiveness during pageload
- CSS :visited selectors have been changed to block websites from being able to check a user's browsing history
- New HTML5 parser
- Support for more HTML5 form controls
- Web authors can now get touch events from Firefox users on Windows 7 machines
- A new way of representing values in JavaScript that allows Firefox to execute heavy, numeric code (used for things like graphics and animations) more efficiently
Changes for v4.0 Beta 7 - v4.0 Beta 8
- The Firefox Sync setup experience has been greatly improved across desktop and mobile devices
- Speed, functionality, and compatibility improvements to WebGL
- Additional polish for the Firefox Add-ons Manager
Changes for v4.0 Beta 6 - v4.0 Beta 7
- Uses JägerMonkey, a new, faster JavaScript engine
- WebGL is enabled by default on Windows and Mac OS X. WebGL support requires an OpenGL-capable graphics card. Support for other graphics cards on Windows (specifically Intel GPUs) and Linux will be coming in a future beta
- Certain rendering operations are now hardware-accelerated using Direct3D 9 on Windows XP, Direct3D 10 on Windows Vista and 7, and OpenGL on Mac OS X
- Improved web typography using OpenType with support for ligatures, kerning and font variants
- HTML5 Forms API makes web based forms easier to implement and validate
Changes for v4.0 beta 5 - v4.0 Beta 6
- Fixed a stability issue affecting Windows users.
- Fixed an issue causing rendering errors with plugins affecting Mac OS X users.
Changes for v4.0 Beta 3 - v4.0 Beta 4
- Firefox 4 Beta 4 is available in 39 languages.
- Firefox Sync is now included by default.
- A new feature gives users a visual overview of all open tabs, allowing them to be sorted and grouped.
- An experimental API is included to provide more efficient Javascript animations.
- Firefox now supports the HTML5 video "buffered" property.
- See the complete changelist from the previous beta.
Changes for v4.0 Beta 2 - v4.0 Beta 3
- Firefox 4 Beta 3 is available in 34 languages.
- Web authors can now get touch events from Firefox users on Windows 7 machines.
- A new way of representing values in JavaScript that allows Firefox to execute heavy, numeric code (used for things like graphics and animations) more efficiently.
- See the complete changelist from the previous beta.
- As well as these features from previous Firefox 4 Betas:
- Tabs are now on top by default on Windows and OSX - Linux will be changing when the theme has been modified to support the change.
- You can turn any tab into an "App Tab" by right-clicking on it and selecting "Make into App Tab" from the context menu.
- Web developers can animate content using CSS Transitions.
- Responsiveness and scrolling improvements from the new retained layers layout system.
- JavaScript speed improvements due to engine optimizations.
- Changes to how XPCOM components are registered in order to help startup time and process separation.
- You can search for and switch to already open tabs in the Smart Location Bar
- New Addons Manager and extension management API (UI will be changed before final release)
- Significant API improvements are available for JS-ctypes, a foreign function interface for extensions.
- The stop and reload buttons have been merged into a single button on Windows, Mac and Linux.
- The Bookmarks Toolbar has been replaced with a Bookmarks Button by default (you can switch it back if you'd like).
- Crash protection for Windows, Linux, and Mac when there is a crash in the Adobe Flash, Apple Quicktime or Microsoft Silverlight plugins.
- CSS Transitions are partially supported.
- Full WebGL support is included but disabled by default at this time.
- Core Animation rendering model for plugins on Mac OS X. Plugins which also support this rendering model can now draw faster and more efficiently.
- Native support for the HD HTML5 WebM video format.
- An experimental Direct2D rendering backend is available on Windows, turned off by default.
- Web developers can use Websockets for a low complexity, low latency, bidirectional communications API.
- Web developers can update the URL field without reloading the page using HTML History APIs.
- More responsive page rendering using lazy frame construction.
- Link history lookup is done asynchronously to provide better responsiveness during pageload.
- CSS :visited selectors have been changed to block websites from being able to check a user's browsing history.
- New HTML5 parser.
- Support for more HTML5 form controls.
- Developers can find out about all the changes and new features at the Mozilla Developer Center.
Changes for v4.0 Beta 1 - v4.0 Beta 2
- Firefox 4 Beta 2 is available in 24 languages.
- Tabs are now on top by default on Windows and OSX - Linux will be changing when the theme has been modified to support the change.
- You can turn any tab into an "App Tab" by right-clicking on it and selecting "Make into App Tab" from the context menu.
- Web developers can animate content using CSS Transitions.
- Responsiveness and scrolling improvements from the new retained layers layout system.
- JavaScript speed improvements due to engine optimizations.
- Changes to how XPCOM components are registered in order to help startup time and process separation.
Changes for v3.6.6 - v4.0 Beta 1
- Tabs are now on top by default on Windows only - OSX and Linux will be changing when the theme has been modified to support the change.
- On Windows Vista and Windows 7 the menu bar has been replaced with the Firefox button.
- You can search for and switch to already open tabs in the Smart Location Bar
- New Addons Manager and extension management API (UI will be changed before final release)
- Significant API improvements are available for JS-ctypes, a foreign function interface for extensions.
- The stop and reload buttons have been merged into a single button on Windows, Mac and Linux.
- The Bookmarks Toolbar has been replaced with a Bookmarks Button by default (you can switch it back if you'd like).
- Crash protection for Windows, Linux, and Mac when there is a crash in the Adobe Flash, Apple Quicktime or Microsoft Silverlight plugins.
- CSS Transitions are partially supported.
- Full WebGL support is included but disabled by default at this time.
- Core Animation rendering model for plugins on Mac OS X. Plugins which also support this rendering model can now draw faster and more efficiently.
- Native support for the HD HTML5 WebM video format.
- An experimental Direct2D rendering backend is available on Windows, turned off by default.
- Web developers can use Websockets for a low complexity, low latency, bidirectional communications API.
- Web developers can update the URL field without reloading the page using HTML History APIs.
- More responsive page rendering using lazy frame construction.
- Link history lookup is done asynchronously to provide better responsiveness during pageload.
- CSS :visited selectors have been changed to block websites from being able to check a user's browsing history.
- New HTML5 parser.
- Support for more HTML5 form controls.
Changes for v3.6.16 - v3.6.17
- Fixed several security issues.
- Fixed several stability issues.
Changes for v3.6.15 - v3.6.16
- Firefox 3.6.16 blacklists a few invalid HTTPS certificates.
Changes for v3.6.14 - v3.6.15
- Fixed an issue where some Java applets would fail to load in Firefox 3.6.14
Changes for v3.6.13 - v3.6.14
- Fixed several security issues.
- Fixed several stability issues.
Changes for v3.6.12 - v3.6.13
- Fixed several security issues.
- Fixed several stability issues.
Changes for v3.6.11 - v3.6.12
- Fixed security issues.
Changes for v3.6.10 - v3.6.11
- Fixed several security issues.
- Fixed several stability issues.
Changes for v3.6.9 - v3.6.10
- Fixed a single stability issue affecting a limited number of users
Changes for v3.6.8 - v3.6.9
- Firefox 3.6.9 fixes the following issues:
- Introduced support for the X-FRAME-OPTIONS HTTP response header. Site owners can use this to mitigate clickjacking attacks by ensuring that their content is not embedded into other sites.
- Fixed several security issues.
- Fixed several stability issues.
- Fixed security issues in Firefox 3.6.9
- MFSA 2010-63 Information leak via XMLHttpRequest statusText
- MFSA 2010-62 Copy-and-paste or drag-and-drop into designMode document allows XSS
- MFSA 2010-61 UTF-7 XSS by overriding document charset using
Changes for v3.6.7 - v3.6.8
- Fixed a single stability issue affecting some pages containing plugins.
Changes for v3.6.4 - v3.6.6
- Firefox 3.6.6 modifies the crash protection feature to increase the amount of time that plugins are allowed to be non-responsive before being terminated.
Changes for v3.6.3 - v3.6.4
- Firefox 3.6.4 provides uninterrupted browsing for Windows and Linux users when there is a crash in the Adobe Flash, Apple Quicktime or Microsoft Silverlight plugins.
- If a plugin crashes or freezes, it will not affect the rest of Firefox. You will be able to reload the page to restart the plugin and try again.
- Firefox 3.6.4 also fixes the following issues found in previous versions of Firefox 3.6:
- Fixed several security issues.
- Fixed several stability issues.
- Fixed in Firefox 3.6.4
- MFSA 2010-33 User tracking across sites using Math.random()
- MFSA 2010-32 Content-Disposition: attachment ignored if Content-Type: multipart also present
- MFSA 2010-31 focus() behavior can be used to inject or steal keystrokes
- MFSA 2010-30 Integer Overflow in XSLT Node Sorting
- MFSA 2010-29 Heap buffer overflow in nsGenericDOMDataNode::SetTextInternal
- MFSA 2010-28 Freed object reuse across plugin instances
- MFSA 2010-26 Crashes with evidence of memory corruption (rv:1.9.2.4/ 1.9.1.10)
Changes for v3.6.2 - v3.6.3
- Firefox 3.6.3 fixes a critical security issue that could potentially allow remote code execution (see bug 555109).
Changes for v3.6 - v3.6.2
- Fixed a critical security issue that could potentially allow remote code execution (see bug 552216).
- Fixed several additional security issues.
- Fixed several stability issues.
- MFSA 2010-08 WOFF heap corruption due to integer overflow
Changes for v3.5.7 - v3.6
- Firefox 3.6 is built on Mozilla's Gecko 1.9.2 web rendering platform, which has been under development since early 2009 and contains many improvements for web developers, add-on developers, and users. This version is also faster and more responsive than previous versions and has been optimized to run on small device operating systems such as Maemo.
- Notable Firefox 3.6 features include:
- Available in more than 70 languages - get your local version.
- Support for a new type of theme called Personas, which allow users to change Firefox's appearance with a single click.
- Protection from out-of-date plugins to keep users safer as they browse.
- Open, native video can now be displayed full screen and supports poster frames.
- Improved JavaScript performance, overall browser responsiveness, and startup time.
- The ability for web developers to indicate that scripts should run asynchronously to speed up page load times.
- Continued support for downloadable web fonts using the new WOFF font format.
- Support for new CSS attributes such as gradients, background sizing, and pointer events.
- Support for new DOM and HTML5 specifications including the Drag & Drop API and the File API, which allow for more interactive web pages.
- Changes to how third-party software can integrate with Firefox in order to prevent crashes.
Changes for v3.6 Beta 2 - v3.6 Beta 3
- Firefox 3.6 Beta is built on Mozilla's Gecko 1.9.2 web rendering platform, which has been under development for several months and contains many improvements for web developers, Add-on developers and users. This version is also faster and more responsive than previous versions, and has been optimized to run on small device operating systems such as Windows CE and Maemo.
- (NEW) Changes to how we allow third party software to integrate with Firefox in order to prevent crashes.
- (NEW) The ability to run scripts asynchronously to speed up page load times.
- More than 80 bug fixes from the last beta to improve performance, stability, security and features.
- This beta is available in more than 60 languages - get your local version.
- Users can now change their browser's appearance with a single click, with built in support for Personas.
- Firefox 3.6 will alert users about out of date plugins to keep them safe.
- Open, native video can now be displayed full screen, and supports poster frames.
- Support for the WOFF font format.
- Improved JavaScript performance, overall browser responsiveness and startup time.
- Support for new CSS, DOM and HTML5 web technologies.
- Developers can find out about all the changes and new features at the Mozilla Developer Center.
Changes for v3.6 Beta 1 - v3.6 Beta 2
- Firefox 3.6 Beta is built on Mozilla's Gecko 1.9.2 web rendering platform, which has been under development for several months and contains many improvements for web developers, Add-on developers and users. This version is also faster and more responsive than previous versions, and has been optimized to run on small device operating systems such as Windows CE and Maemo.
- More than 190 bug fixes from the last beta to improve performance, stability, security and features.
- This beta is available in more than 45 languages - get your local version.
- Users can now change their browser's appearance with a single click, with built in support for Personas.
- Firefox 3.6 will alert users about out of date plugins to keep them safe.
- Open, native video can now be displayed full screen, and supports poster frames.
- Support for the WOFF font format.
- Improved JavaScript performance, overall browser responsiveness and startup time.
- Support for new CSS, DOM and HTML5 web technologies.
Changes for v3.6 Alpha 1 (Namoroka) - v3.6 Beta 1
- Users can now change their browser’s appearance with a single click, with built in support for Personas.
- Firefox 3.6 will alert users about out of date plugins to keep them safe.
- Open, native video can now be displayed full screen, and supports poster frames.
- Support for the WOFF font format.
- Improved JavaScript performance, overall browser responsiveness and startup time.
- Support for new CSS, DOM and HTML5 web technologies.
Changes for v3.5.9 - v3.5.10
- Fixed several security issues.
- Fixed several stability issues.
- Security fixes
- MFSA 2010-33 User tracking across sites using Math.random()
- MFSA 2010-32 Content-Disposition: attachment ignored if Content-Type: multipart also present
- MFSA 2010-31 focus() behavior can be used to inject or steal keystrokes
- MFSA 2010-30 Integer Overflow in XSLT Node Sorting
- MFSA 2010-29 Heap buffer overflow in nsGenericDOMDataNode::SetTextInternal
- MFSA 2010-28 Freed object reuse across plugin instances
- MFSA 2010-27 Use-after-free error in nsCycleCollector::MarkRoots()
- MFSA 2010-26 Crashes with evidence of memory corruption (rv:1.9.2.4/ 1.9.1.10)
- MFSA 2010-25 Re-use of freed object due to scope confusion
Changes for v3.5.7 - v3.5.8
- Firefox 3.5.8 fixes the following issues:
- Fixed several security issues.
- Fixed several stability issues.
- Fixed in Firefox 3.5.8
- MFSA 2010-05 XSS hazard using SVG document and binary Content-Type
- MFSA 2010-04 XSS due to window.dialogArguments being readable cross-domain
- MFSA 2010-03 Use-after-free crash in HTML parser
- MFSA 2010-02 Web Worker Array Handling Heap Corruption Vulnerability
- MFSA 2010-01 Crashes with evidence of memory corruption (rv:1.9.1.8/ 1.9.0.18)
Changes for v3.5.6 - v3.5.7
- Fixed a common stability issue.
- Fixed a problem with how updates were being presented to users.
Changes for v3.5.5 - v3.5.6
- Firefox 3.5.6 fixes the following issues:
- Fixed several security issues.
- Fixed several stability issues.
- Fixed in Firefox 3.5.6
- MFSA 2009-71 GeckoActiveXObject exception messages can be used to enumerate installed COM objects
- MFSA 2009-70 Privilege escalation via chrome window.opener
- MFSA 2009-69 Location bar spoofing vulnerabilities
- MFSA 2009-68 NTLM reflection vulnerability
- MFSA 2009-67 Integer overflow, crash in libtheora video library
- MFSA 2009-66 Memory safety fixes in liboggplay media library
- MFSA 2009-65 Crashes with evidence of memory corruption (rv:1.9.1.6/ 1.9.0.16)
Changes for v3.5.4 - v3.5.5
- Several security issues.
- Fixed several stability issues.
- Added the ability to re-submit crash reports (bug 378528)
- After using Clear Recent History some SSL sites would not load all images and styles without pressing reload (see bug 480619)
Changes for v3.5.3 - v3.5.4
- Several security issues.
- Fixed several stability issues.
- Added the ability to re-submit crash reports (bug 378528)
- After using Clear Recent History some SSL sites would not load all images and styles without pressing reload (see bug 480619)
- MFSA 2009-64 Crashes with evidence of memory corruption (rv:1.9.1.4/ 1.9.0.15)
- MFSA 2009-63 Upgrade media libraries to fix memory safety bugs
- MFSA 2009-62 Download filename spoofing with RTL override
- MFSA 2009-61 Cross-origin data theft through document.getSelection()
- MFSA 2009-59 Heap buffer overflow in string to number conversion
- MFSA 2009-57 Chrome privilege escalation in XPCVariant::VariantDataToJS()
- MFSA 2009-56 Heap buffer overflow in GIF color map parser
- MFSA 2009-55 Crash in proxy auto-configuration regexp parsing
- MFSA 2009-54 Crash with recursive web-worker calls
- MFSA 2009-53 Local downloaded file tampering
- MFSA 2009-52 Form history vulnerable to stealing
Changes for v3.5.2 - v3.5.3
- MFSA 2009-51 Chrome privilege escalation with FeedWriter
- MFSA 2009-50 Location bar spoofing via tall line-height Unicode characters
- MFSA 2009-49 TreeColumns dangling pointer vulnerability
- MFSA 2009-47 Crashes with evidence of memory corruption (rv:1.9.1.3/1.9.0.14)
Changes for v3.5 - v3.5.1
- Several security issues.
- Several stability issues.
- An issue that was making Firefox take a long time to load on some Windows systems.
Changes for v3.0.11 - v3.5
- Firefox 3.5 is based on the Gecko 1.9.1 rendering platform, which has been under development for the past year. Firefox 3.5 offers many changes over the previous version, supporting new web technologies, improving performance and ease of use. Some of the notable features are:
- Available in more than 70 languages. (Get your local version!)
- Support for the HTML5
Changes for v3.1 Beta 3 - v3.5 Beta 4
- Firefox 3.5 Beta 4 is based on the Gecko 1.9.1 rendering platform, which has been under development for the past 10 months. Firefox 3.5 offers many changes over the previous version, supporting new web technologies, improving performance and ease of use, and adding new features for users:
- This beta is now available in 70 languages - get your local version.
- Improved tools for controlling your private data, including a Private Browsing Mode.
- Better performance and stability with the new TraceMonkey JavaScript engine.
- The ability to provide Location Aware Browsing using web standards for geolocation.
- Support for native JSON, and web worker threads.
- Improvements to the Gecko layout engine, including speculative parsing for faster content rendering.
- Support for new web technologies such as: HTML5
Changes for v3.0.1 - v3.1 alpha 2
- Support for the HTML 5
Changes for v3.0.17 - v3.0.18
- Firefox 3.0.18 fixes several issues found in Firefox 3.0.17:
- Fixed several security issues.
- Fixed several stability issues.
- Fixed in Firefox 3.0.18
- MFSA 2010-05 XSS hazard using SVG document and binary Content-Type
- MFSA 2010-04 XSS due to window.dialogArguments being readable cross-domain
- MFSA 2010-03 Use-after-free crash in HTML parser
- MFSA 2010-02 Web Worker Array Handling Heap Corruption Vulnerability
- MFSA 2010-01 Crashes with evidence of memory corruption (rv:1.9.1.8/ 1.9.0.18)
Changes for v3.1 alpha 2 - v3.0.17
- Fixed a common stability issue.
- Fixed a problem with how updates were being presented to users.
Changes for v3.0.10 - v3.0.11
- Fixed several security issues.
- Fixed several stability issues.
- Several issues were reported with the internal database, SQLite, which have now been fixed by upgrading to a newer version.
- Fixed an issue where, in some specific cases, the bookmarks database would become corrupt. (bug 464486)
Changes for v3.0.6 - v3.0.7
- What's New
- Fixed several security issues.
- Fixed several stability issues.
- Official releases for the Estonian, Kannada and Telugu languages are now available.
- Items in the "File" menu show as inactive after using the "Print" item from that menu - switching to a new tab restores them (bug 425844). This issue has been fixed.
- For some users, cookies would appear to go “missing” after a few days (bug 444600).
- Mac users of the Flashblock add-on, experienced an issue where sound from the Flash plug-in would continue to play for a short time after closing a tab or window (bug 474022).
- Fixed several issues related to accessibility features.
- Fixed in Firefox 3.0.7
- MFSA 2009-11 URL spoofing with invisible control characters
- MFSA 2009-10 Upgrade PNG library to fix memory safety hazards
- MFSA 2009-09 XML data theft via RDFXMLDataSource and cross-domain redirect
- MFSA 2009-08 Mozilla Firefox XUL Linked Clones Double Free Vulnerability
- MFSA 2009-07 Crashes with evidence of memory corruption (rv:1.9.0.7)
Changes for v3.0.2 - v3.0.3
- Fixed a problem where users were unable to retrieve saved passwords or save new passwords (bug 454708)
Changes for v3.0 RC 3 - v3.0
- Firefox 3 is based on the Gecko 1.9 Web rendering platform, which has been under development for the past 34 months. This new platform includes more than 15,000 changes to improve performance, stability, rendering correctness, and code simplification and sustainability. Firefox 3 is built on top of this new platform resulting in a more secure, easier to use, more personal product with a lot more under the hood to offer website and Firefox add-on developers.
- More Secure
- One-click site info: Click the site favicon in the location bar to see who owns the site and to check if your connection is protected from eavesdropping. Identity verification is prominently displayed and easier to understand. When a site uses Extended Validation (EV) SSL certificates, the site favicon button will turn green and show the name of the company you're connected to.
- Malware Protection: malware protection warns users when they arrive at sites which are known to install viruses, spyware, trojans or other malware.
- New Web Forgery Protection page: the content of pages suspected as web forgeries is no longer shown.
- New SSL error pages: clearer and stricter error pages are used when Firefox encounters an invalid SSL certificate.
- Add-ons and Plugin version check: Firefox now automatically checks add-on and plugin versions and will disable older, insecure versions.
- Secure add-on updates: to improve add-on update security, add-ons that provide updates in an insecure manner will be disabled.
- Anti-virus integration: Firefox will inform anti-virus software when downloading executables.
- Vista Parental Controls: Firefox now respects the Vista system-wide parental control setting for disabling file downloads.
- Effective top-level domain (eTLD) service better restricts cookies and other restricted content to a single domain.
- Better protection against cross-site JSON data leaks.
- Easier to Use
- Easier password management: an information bar replaces the old password dialog so you can now save passwords after a successful login.
- Simplified add-on installation: the add-ons whitelist has been removed making it possible to install extensions from third-party sites in fewer clicks.
- New Download Manager: the revised download manager makes it much easier to locate downloaded files, and you can see and search on the name of the website where a file came from. Your active downloads and time remaining are always shown in the status bar as your files download.
- Resumable downloading: users can now resume downloads after restarting the browser or resetting your network connection.
- Full page zoom: from the View menu and via keyboard shortcuts, the new zooming feature lets you zoom in and out of entire pages, scaling the layout, text and images, or optionally only the text size. Your settings will be remembered whenever you return to the site.
- Podcasts and Videocasts can be associated with your media playback tools.
- Tab scrolling and quickmenu: tabs are easier to locate with the new tab scrolling and tab quickmenu.
- Save what you were doing: Firefox will prompt users to save tabs on exit.
- Optimized Open in Tabs behavior: opening a folder of bookmarks in tabs now appends the new tabs rather than overwriting.
- Location and Search bar size can now be customized with a simple resizer item.
- Text selection improvements: multiple text selections can be made with Ctrl/Cmd; double-click drag selects in "word-by-word" mode; triple-clicking selects a paragraph.
- Find toolbar: the Find toolbar now opens with the current selection.
- Plugin management: users can disable individual plugins in the Add-on Manager.
- Integration with Windows: Firefox now has improved Windows icons, and uses native user interface widgets in the browser and in web forms.
- Integration with the Mac: the new Firefox theme makes toolbars, icons, and other user interface elements look like a native OS X application. Firefox also uses OS X widgets and supports Growl for notifications of completed downloads and available updates. A combined back and forward control make it even easier to move between web pages.
- Integration with Linux: Firefox's default icons, buttons, and menu styles now use the native GTK theme.
- More Personal
- Star button: quickly add bookmarks from the location bar with a single click; a second click lets you file and tag them.
- Tags: associate keywords with your bookmarks to sort them by topic.
- Smart Location Bar: type in all or part of the title, tag or address of a page to see a list of matches from your history and bookmarks; a new display makes it easier to scan through the matching results and find that page you're looking for. Results are returned according to their a combination of frequency, and recency of visits to that page, ensuring that you're seeing the most relevant matches. An adaptive learning algorithm further tunes the results to your patterns!
- Library: view, organize and search through your bookmarks, tags and browsing history using the new Library window. Create or restore full backups of this data whenever with a few clicks.
- Smart Bookmark Folders: quickly access your most visited bookmarks from the toolbar, or recently bookmarked and tagged pages from the bookmark menu. Create your own Smart Bookmark Folders by saving a search query in the Library.
- Web-based protocol handlers: web applications, such as your favorite webmail provider, can now be used instead of desktop applications for handling mailto: links from other sites. Similar support is available for other protocols (Web applications will have to first enable this by registering as handlers with Firefox).
- Download & Install Add-ons: the Add-ons Manager (Tools > Add-ons) can now be used to download and install a Firefox customization from the thousands of Add-ons available from our community add-ons website. When you first open the Add-ons Manager, a list of recommended Add-ons is shown.
- Easy to use Download Actions: a new Applications preferences pane provides a better UI for configuring handlers for various file types and protocol schemes.
- Improved Platform for Developers
- New graphics and font handling: new graphics and text rendering architectures in Gecko 1.9 provides rendering improvements in CSS, SVG as well as improved display of fonts with ligatures and complex scripts.
- Color management: (set gfx.color_management.enabled on in about:config and restart the browser to enable.) Firefox can now adjust images with embedded color profiles.
- Offline support: enables web applications to provide offline functionality (website authors must add support for offline browsing to their site for this feature to be available to users).
- A more complete overview of Firefox 3 for developers is available for website and add-on developers.
- Improved Performance
- Speed: improvements to our JavaScript engine as well as profile guided optimizations have resulted in continued improvements in performance. Compared to Firefox 2, web applications like Google Mail and Zoho Office run twice as fast in Firefox 3, and the popular SunSpider test from Apple shows improvements over previous releases.
- Memory usage: Several new technologies work together to reduce the amount of memory used by Firefox 3 over a web browsing session. Memory cycles are broken and collected by an automated cycle collector, a new memory allocator reduces fragmentation, hundreds of leaks have been fixed, and caching strategies have been tuned.
- Reliability: A user's bookmarks, history, cookies, and preferences are now stored in a transactionally secure database format which will prevent data loss even if their system crashes.
Changes for v2.0.0.14 - v3.0 RC 3
- More Secure
- One-click site info: Click the site favicon in the location bar to see who owns the site and to check if your connection is protected from eavesdropping. Identity verification is prominently displayed and easier to understand. When a site uses Extended Validation (EV) SSL certificates, the site favicon button will turn green and show the name of the company you're connected to. (Try it here!)
- Malware Protection: malware protection warns users when they arrive at sites which are known to install viruses, spyware, trojans or other malware. (Try it here!)
- New Web Forgery Protection page: the content of pages suspected as web forgeries is no longer shown. (Try it here!)
- New SSL error pages: clearer and stricter error pages are used when Firefox encounters an invalid SSL certificate. (Try it here!)
- Add-ons and Plugin version check: Firefox now automatically checks add-on and plugin versions and will disable older, insecure versions.
- Secure add-on updates: to improve add-on update security, add-ons that provide updates in an insecure manner will be disabled.
- Anti-virus integration: Firefox will inform anti-virus software when downloading executables.
- Vista Parental Controls: Firefox now respects the Vista system-wide parental control setting for disabling file downloads.
- Effective top-level domain (eTLD) service better restricts cookies and other restricted content to a single domain.
- Better protection against cross-site JSON data leaks.
- Easier to Use
- Easier password management: an information bar replaces the old password dialog so you can now save passwords after a successful login.
- Simplified add-on installation: the add-ons whitelist has been removed making it possible to install extensions from third-party sites in fewer clicks.
- New Download Manager: the revised download manager makes it much easier to locate downloaded files, and you can see and search on the name of the website where a file came from. Your active downloads and time remaining are always shown in the status bar as your files download.
- Resumable downloading: users can now resume downloads after restarting the browser or resetting your network connection.
- Full page zoom: from the View menu and via keyboard shortcuts, the new zooming feature lets you zoom in and out of entire pages, scaling the layout, text and images, or optionally only the text size. Your settings will be remembered whenever you return to the site.
- Podcasts and Videocasts can be associated with your media playback tools.
- Tab scrolling and quickmenu: tabs are easier to locate with the new tab scrolling and tab quickmenu.
- Save what you were doing: Firefox will prompt users to save tabs on exit.
- Optimized Open in Tabs behavior: opening a folder of bookmarks in tabs now appends the new tabs rather than overwriting.
- Location and Search bar size can now be customized with a simple resizer item.
- Text selection improvements: multiple text selections can be made with Ctrl/Cmd; double-click drag selects in "word-by-word" mode; triple-clicking selects a paragraph.
- Find toolbar: the Find toolbar now opens with the current selection.
- Plugin management: users can disable individual plugins in the Add-on Manager.
- Integration with Windows: Firefox now has improved Windows icons, and uses native user interface widgets in the browser and in web forms.
- Integration with the Mac: the new Firefox theme makes toolbars, icons, and other user interface elements look like a native OS X application. Firefox also uses OS X widgets and supports Growl for notifications of completed downloads and available updates. A combined back and forward control make it even easier to move between web pages.
- Integration with Linux: Firefox's default icons, buttons, and menu styles now use the native GTK theme.
- More Personal
- Star button: quickly add bookmarks from the location bar with a single click; a second click lets you file and tag them.
- Tags: associate keywords with your bookmarks to sort them by topic.
- Location bar & auto-complete: type in all or part of the title, tag or address of a page to see a list of matches from your history and bookmarks; a new display makes it easier to scan through the matching results and find that page you're looking for. Results are returned according to their frecency (a combination of frequency and recency of visits to that page) ensuring that you're seeing the most relevant matches. An adaptive learning algorithm further tunes the results to your patterns!
- Smart Bookmarks Folder: quickly access your recently bookmarked and tagged pages, as well as your more frequently visited pages with the new smart bookmarks folder on your bookmark toolbar.
- Places Organizer: view, organize and search through all of your bookmarks, tags, and browsing history with multiple views and smart folders to store your frequent searches. Create and restore full backups whenever you want.
- Web-based protocol handlers: web applications, such as your favorite webmail provider, can now be used instead of desktop applications for handling mailto: links from other sites. Similar support is available for other protocols (Web applications will have to first enable this by registering as handlers with Firefox).
- Download & Install Add-ons: the Add-ons Manager (Tools > Add-ons) can now be used to download and install a Firefox customization from the thousands of Add-ons available from our community add-ons website. When you first open the Add-ons Manager, a list of recommended Add-ons is shown.
- Easy to use Download Actions: a new Applications preferences pane provides a better UI for configuring handlers for various file types and protocol schemes.
- Improved Platform for Developers
- New graphics and font handling: new graphics and text rendering architectures in Gecko 1.9 provides rendering improvements in CSS, SVG as well as improved display of fonts with ligatures and complex scripts.
- Color management: (set gfx.color_management.enabled on in about:config and restart the browser to enable.) Firefox can now adjust images with embedded color profiles.
- Offline support: enables web applications to provide offline functionality (website authors must add support for offline browsing to their site for this feature to be available to users).
- A more complete overview of Firefox 3 for developers is available for website and add-on developers.
- Improved Performance
- Speed: improvements to our JavaScript engine as well as profile guided optimizations have resulted in continued improvements in performance. Compared to Firefox 2, web applications like Google Mail and Zoho Office run twice as fast in Firefox 3, and the popular SunSpider test from Apple shows improvements over previous releases.
- Memory usage: Several new technologies work together to reduce the amount of memory used by Firefox 3 over a web browsing session. Memory cycles are broken and collected by an automated cycle collector, a new memory allocator reduces fragmentation, hundreds of leaks have been fixed, and caching strategies have been tuned.
- Reliability: A user's bookmarks, history, cookies, and preferences are now stored in a transactionally secure database format which will prevent data loss even if their system crashes.
Changes for v2.0.0.14 - v2.0.0.15
- MFSA 2008-33 Crash and remote code execution in block reflow
- MFSA 2008-32 Remote site run as local file via Windows URL shortcut
- MFSA 2008-31 Peer-trusted certs can use alt names to spoof
- MFSA 2008-30 File location URL in directory listings not escaped properly
- MFSA 2008-29 Faulty .properties file results in uninitialized memory being used
- MFSA 2008-28 Arbitrary socket connections with Java LiveConnect on Mac OS X
- MFSA 2008-27 Arbitrary file upload via originalTarget and DOM Range
- MFSA 2008-25 Arbitrary code execution in mozIJSSubScriptLoader.loadSubScript()
- MFSA 2008-24 Chrome script loading from fastload file
- MFSA 2008-23 Signed JAR tampering
- MFSA 2008-22 XSS through JavaScript same-origin violation
- MFSA 2008-21 Crashes with evidence of memory corruption (rv:1.8.1.15)
Changes for v2.0.0.9 - v2.0.0.10
- Fixed
- MFSA 2007-39 Referer-spoofing via window.location race condition
- MFSA 2007-38 Memory corruption vulnerabilities (rv:1.8.1.10)
- MFSA 2007-37 jar: URI scheme XSS hazard
