What’s New
- FIXED
25.0.1: New security fixes can be found here- FIXED
25.0.1: Pages sometimes wouldn't load without first moving the cursor- NEW
Web Audio support- NEW
The find bar is no longer shared between tabs- CHANGED
If away from Firefox for months, you now will be offered the option to reset it to its default state while preserving your essential information- CHANGED
Resetting Firefox no longer clears your browsing session- DEVELOPER
CSS3 background-attachment:local support to control background scrolling- DEVELOPER
Many new ES6 functions implemented- HTML5
iframe document content can now be specified inline- FIXED
Blank or missing page thumbnails when opening a new tab
What’s New
- NEW
All Java plug-ins are defaulted to 'click to play'- NEW
Password manager now supports script-generated password fields- NEW
Updates can now be performed by Windows users without write permissions to Firefox install directory (requires Mozilla Maintenance Service)- NEW
Support for H.264 on Linux if the appropriate gstreamer plug-ins are installed- CHANGED
Support for MP3 decoding on Windows XP, completing MP3 support across Windows OS versions- CHANGED
CSP implementation now supports multiple policies, including the case of both an enforced and Report-Only policy, per the spec- DEVELOPER
Social API now supports Social Bookmarking for multiple providers through its SocialMarks functionality (see MDN docs)- DEVELOPER
Math.ToFloat32 takes a JS value and converts it to a Float32, whenever possible- DEVELOPER
There is no longer a prompt when websites use appcache- DEVELOPER
Support for the CSS image orientation property- DEVELOPER
New App Manager allows you to deploy and debug HTML5 webapps on Firefox OS phones and the Firefox OS Simulator- DEVELOPER
IndexedDB can now be used as a "optimistic" storage area so it doesn't require any prompts and data is stored in a pool with LRU eviction policy, in short temporary storage- FIXED
When displaying a standalone image, Firefox matches the EXIF orientation information contained within the JPEG image (298619)- FIXED
Text Rendering Issues on Windows 7 with Platform Update KB2670838 (MSIE 10 Prerequisite) or on Windows 8.1 (812695)- FIXED
Improved page load times due to no longer decoding images that aren't visible (847223)- FIXED
AudioToolbox MP3 backend for OSX (914479)- FIXED
Various security fixes
What’s New
- NEW
You can now run more than one service at a time with Firefox SocialAPI, allowing you to receive notifications, chat and more from multiple integrated services- CHANGED
Enabled TLS 1.1 (RFC 4346) and TLS 1.2 (RFC 5246) by default- CHANGED
Added support for SPDY 3.1 protocol- DEVELOPER
Ability to reset style sheets using 'all:unset'- DEVELOPER
You can now choose to deobfuscate javascript in the debugger (see 762761)- DEVELOPER
Added support for scrolled fieldsets (see 261037)- DEVELOPER
Implemented allow-popups directive for iframe sandbox, enabling increased security (see 766282)- DEVELOPER
CSS cursor keywords -moz-grab and -moz-grabbing have been unprefixed (see 880672)- DEVELOPER
Added support for ES6 generators in SpiderMonkey (see blog post)- DEVELOPER
Implemented support for mathematical function Math.hypot() in ES6 (see 896264)- HTML5
Dashed line support on Canvas (see 768067)- FIXED
Get Azure/Skia content rendering working on Linux (see 740200)- FIXED
27.0: Security fixes can be found here
What’s New
- FIXED
27.0.1 - Fixed stability issues with Greasemonkey and other JS that used ClearTimeoutOrInterval- FIXED
27.0.1 - JS math correctness issue (bug 941381- NEW
You can now run more than one service at a time with Firefox SocialAPI, allowing you to receive notifications, chat and more from multiple integrated services- CHANGED
Enabled TLS 1.1 (RFC 4346) and TLS 1.2 (RFC 5246) by default- CHANGED
Added support for SPDY 3.1 protocol- DEVELOPER
Ability to reset style sheets using 'all:unset'- DEVELOPER
You can now choose to deobfuscate javascript in the debugger (see 762761)- DEVELOPER
Added support for scrolled fieldsets (see 261037)- DEVELOPER
Implemented allow-popups directive for iframe sandbox, enabling increased security (see 766282)- DEVELOPER
CSS cursor keywords -moz-grab and -moz-grabbing have been unprefixed (see 880672)- DEVELOPER
Added support for ES6 generators in SpiderMonkey (see blog post)- DEVELOPER
Implemented support for mathematical function Math.hypot() in ES6 (see 896264)- HTML5
Dashed line support on Canvas (see 768067)- FIXED
Get Azure/Skia content rendering working on Linux (see 740200)- FIXED
Various security fixes
What’s New
Known Issues
- NEW
VP9 video decoding implemented- NEW
Mac OS X: Notification Center support for web notifications- NEW
Horizontal HTML5 audio/video volume control- NEW
Support for Opus in WebM- CHANGED
Now that spdy/3 is implemented support for spdy/2 has been removed and servers without spdy/3 will negotiate to http/1 without any penalty- DEVELOPER
Support for MathML 2.0 'mathvariant' attribute- DEVELOPER
Background thread hang reporting- DEVELOPER
Support for multi-line flexbox in layout- FIXED
Various security fixes
- UNRESOLVED
Echo cancellation on apprtc.appspot.com fails (see974537)
Unresolved on v28 Resolved in v29- UNRESOLVED
Text Rendering Issues on Windows 7 with Platform Update KB2670838 (MSIE 10 Prerequisite) or on Windows 8.1 has a workaround (see 812695)
What’s New
Known Issues
- NEW
VP9 video decoding implemented
- NEW
Mac OS X: Notification Center support for web notifications
- NEW
Horizontal HTML5 audio/video volume control
- NEW
Support for Opus in WebM
- CHANGED
Now that spdy/3 is implemented support for spdy/2 has been removed and servers without spdy/3 will negotiate to http/1 without any penalty
- DEVELOPER
Support for MathML 2.0 'mathvariant' attribute
- DEVELOPER
Background thread hang reporting
- DEVELOPER
Support for multi-line flexbox in layout
- FIXED
Various security fixes
- UNRESOLVED
Text Rendering Issues on Windows 7 with Platform Update KB2670838 (MSIE 10 Prerequisite) or on Windows 8.1 has a workaround (see 812695)
- UNRESOLVED
Echo cancellation on apprtc.appspot.com fails (974537)
What’s New
Known Issues
- FIXED
29.0.1 -pdf.js printing white page (1003707)
- FIXED
29.0.1 - Tabs not visible with dark themes under Windows 8.1 (907373)
- FIXED
29.0.1 - Session Restore failed with a corrupted sessionstore.js file (1001167)
- FIXED
29.0.1 - Seer disabled by default (1005958)
- NEW
Significant new customization mode makes it easy to personalize your Web experience to access the features you use the most (learn more)
- NEW
A new, easy to access menu sits in the right hand corner of Firefox and includes popular browser controls
- NEW
Sleek new tabs provide an overall smoother look and fade into the background when not active
- NEW
An interactive onboarding tour to guide users through the new Firefox changes
- NEW
The ability to set up Firefox Sync by creating a Firefox account (learn more)
- NEW
Gamepad API finalized and enabled (learn more)
- NEW
HTTPS used for Yahoo Searches performed in en-US locale
- NEW
Malay [ma] locale added
- CHANGED
Clicking on a W3C Web Notification will switch to the originating tab
- DEVELOPER
'box-sizing' (dropping the -moz- prefix) implemented (learn more)
- DEVELOPER
Console object available in Web Workers (learn more)
- DEVELOPER
Promises enabled by default (learn more)
- DEVELOPER
SharedWorker enabled by default
- DEVELOPER
<input type="number"> implemented and enabled
- DEVELOPER
<input type="color"> implemented and enabled
- DEVELOPER
Enabled ECMAScript Internationalization API
- DEVELOPER
Add-on bar has been removed, content moved to navigation bar
- DEVELOPER
Implemented URLSearchParams from the URL specification (see MDN for details )
- FIXED
Various security fixes
- UNRESOLVED
Text Rendering Issues on Windows 7 with Platform Update KB2670838 (MSIE 10 Prerequisite) or on Windows 8.1 has a workaround (see 812695)
- UNRESOLVED
Without affecting security, after restoring your session, Extended Validation Certificates might not display (See995801)
- UNRESOLVED
Slow shut downs lead to 'Firefox is already running' warning (see 966469 and 985655)
What’s New
Known Issues
- NEW
Sidebars button in browser chrome enables faster access to social, bookmark, & history sidebars
- NEW
Mac OS X command-E sets find term to selected text
- NEW
Support for GStreamer 1.0
- CHANGED
Disallow calling WebIDL constructors as functions on the web
- DEVELOPER
With the exception of those bundled inside an extension or ones that are whitelisted, plugins will no longer be activated by default (see blog post)
- DEVELOPER
Fixes to box-shadow and other visual overflow (see bug 480888)
- DEVELOPER
Mute and volume available per window when using WebAudio
- DEVELOPER
background-blend-mode enabled by default
- DEVELOPER
Use of line-height allowed for <input type="reset|button|submit">
- DEVELOPER
ES6 array and generator comprehensions implemented (read docs for more details)
- DEVELOPER
Error stack now contains column number
- DEVELOPER
Support for alpha option in canvas context options (feature description)
- FIXED
Ignore autocomplete="off" when offering to save passwords via the password manager (see 956906)
- FIXED
TypedArrays don't support new named properties (see695438)
- UNRESOLVED
Errors loading scripts inside eval scripts with Developer Tools open (998908)
Resolved in v31.0beta
- UNRESOLVED
Mac OS X: cmd-L no longer opens a new window when no window is available (1008793)
Resolved in v32.0a2
- UNRESOLVED
Without affecting security, after restoring your session, Extended Validation Certificates might not display (See995801)
Resolved in v31.0a2
- UNRESOLVED
Slow shut downs lead to 'Firefox is already running' warning (see 966469 and 985655)
What’s New
Known Issues
- NEW
Add the search field to the new tab page
- NEW
Support of Prefer:Safe http header for parental control (learn more)
- NEW
mozilla:kix as default certificate verifier (learn more)
- NEW
Block malware from downloaded files (learn more)
- NEW
Partial implementation of the OpenType MATH table(section 6.3.6) see documentation about mathematical fonts and the MathML Torture Test for details
- NEW
audio/video .ogg and .pdf files handled by Firefox if no application specified (Windows only)
- NEW
Upper Sorbian [hsb] locale added
- CHANGED
Removal of the CAPS infrastructure for specifying site-specific permissions (via capability.policy.* preferences). Most notably, attempts to use this functionality to grant access to the clipboard will no longer work. The sole exception is the checkloaduri permission, which may still be used as before to allow sites to load file:// URIs.
- HTML5
WebVTT implemented and enabled (learn more)
- HTML5
CSS3 variables implemented (learn more)
- DEVELOPER
Developer Tools: Add-on Debugger (learn more)
- DEVELOPER
Developer Tools: Canvas Debugger (learn more)
- DEVELOPER
New Array built-in: Array.prototype.fill() (learn more)
- DEVELOPER
New Object built-in: Object.setPrototypeOf() (learn more)
- DEVELOPER
CSP 1.1 nonce-source and hash-source enabled by default
- DEVELOPER
Developer Tools: Eyedropper tool added to the color picker (learn more)
- DEVELOPER
Developer Tools: Editable Box Model (learn more)
- DEVELOPER
Developer Tools: Code Editor improvements (learn more)
- DEVELOPER
Developer Tools: Console stack traces (learn more)
- DEVELOPER
Developer Tools: Copy as cURL (learn more)
- DEVELOPER
Developer Tools: Styled console logs (learn more)
- DEVELOPER
navigator.sendBeacon enabled by default (learn more)
- DEVELOPER
Dialogs spawned from the onbeforeunload event no longer block access to the rest of the browser
- FIXED
Search for partially selected link text from context menu (985824)
- UNRESOLVED
Slow shut downs lead to 'Firefox is already running' warning (see 966469 and 985655)
- UNRESOLVED
PDF.js: With some fonts, some characters might not be displayed. Affects a very small number of PDF (1028735)
- UNRESOLVED
Mac OS X and Windows: Citrix Receiver no longer works. As a workaround, mark the plugin as Always Enable in the addon manager (1025627)
- UNRESOLVED
GNU/Linux and Windows XP: Google Maps Street View displays a black screen (1034593)
Resolved in v32.0a2
- UNRESOLVED
Mac OS X: cmd-L no longer opens a new window when no window is available (1008793)
Resolved in v32.0a2
What’s New
Known Issues
- NEW
New HTTP cache provides improved performance including crash recovery
- NEW
Integration of generational garbage collection
- NEW
Public key pinning support enabled
- NEW
Display the number of found items in the find toolbar
- NEW
Easier back, forward, reload, and bookmarking through the context menu
- NEW
View historical use information for logins stored in password manager
- NEW
Lower Sorbian [dsb] locale added
- CHANGED
Removed and turned off trust bit for some 1024-bit root certificates
- CHANGED
Performance improvements to Password Manager and Add-on Manager
- HTML5
drawFocusIfNeeded enabled by default
- HTML5
CSS position:sticky enabled by default
- HTML5
mix-blend-mode enabled by default
- HTML5
Vibration API updated to latest W3C spec
- HTML5
box-decoration-break enabled by default
- HTML5
ECMAScript 6 built-in method Array#copyWithin implemented
- HTML5
New Array built-in: Array.from()
- HTML5
navigator.languages property and languagechange eventimplemented
- HTML5
CSS box-decoration-break replaces -moz-background-inline-policy
- DEVELOPER
HiDPI support in Developer Tools UI
- DEVELOPER
Inspector button moved to the top left
- DEVELOPER
Hidden nodes displayed differently in the markup-view
- DEVELOPER
New Web Audio Editor
- DEVELOPER
Code completion and inline documentation added to Scratchpad
- FIXED
Mac OS X: cmd-L does not open a new window when no window is available
- FIXED
Text Rendering Issues on Windows 7 with Platform Update KB2670838 (MSIE 10 Prerequisite) or on Windows 8.1
- FIXED
Various security fixes
- UNRESOLVED
Assistive technologies may cause performance issues on Windows XP
What’s New
Known Issues
- FIXED
32.0.1 - Stability issues for computers with multiple graphics cards
- FIXED
32.0.1 - Mixed content icon may be incorrectly displayed instead of lock icon for SSL sites
- FIXED
32.0.1 - WebRTC: setRemoteDescription() silently fails if no success callback is specified
- NEW
New HTTP cache provides improved performance including crash recovery
- NEW
Integration of generational garbage collection
- NEW
Public key pinning support enabled
- NEW
View historical use information for logins stored in password manager
- NEW
Display the number of found items in the find toolbar
- NEW
Easier back, forward, reload, and bookmarking through the context menu
- NEW
Lower Sorbian [dsb] locale added
- CHANGED
Removed and turned off trust bit for some 1024-bit root certificates
- CHANGED
Performance improvements to Password Manager and Add-on Manager
- HTML5
drawFocusIfNeeded enabled by default
- HTML5
ECMAScript 6 built-in method Array#copyWithin implemented
- HTML5
CSS position:sticky enabled by default
- HTML5
mix-blend-mode enabled by default
- HTML5
New Array built-in: Array.from()
- HTML5
navigator.languages property and languagechange eventimplemented
- HTML5
Vibration API updated to latest W3C spec
- HTML5
CSS box-decoration-break replaces -moz-background-inline-policy
- HTML5
box-decoration-break enabled by default
- DEVELOPER
HiDPI support in Developer Tools UI
- DEVELOPER
Inspector button moved to the top left
- DEVELOPER
Hidden nodes displayed differently in the markup-view
- DEVELOPER
New Web Audio Editor
- DEVELOPER
Code completion and inline documentation added to Scratchpad
- FIXED
Various security fixes
- FIXED
Mac OS X: cmd-L does not open a new window when no window is available
- FIXED
Text Rendering Issues on Windows 7 with Platform Update KB2670838 (MSIE 10 Prerequisite) or on Windows 8.1
- UNRESOLVED
Assistive technologies may cause performance issues on Windows XP
What’s New
Known Issues
- FIXED
32.0.2 - Corrupt installations cause Firefox to crash on update
- NEW
New HTTP cache provides improved performance including crash recovery
- NEW
Integration of generational garbage collection
- NEW
Public key pinning support enabled
- NEW
View historical use information for logins stored in password manager
- NEW
Display the number of found items in the find toolbar
- NEW
Easier back, forward, reload, and bookmarking through the context menu
- NEW
Lower Sorbian [dsb] locale added
- CHANGED
Removed and turned off trust bit for some 1024-bit root certificates
- CHANGED
Performance improvements to Password Manager and Add-on Manager
- HTML5
drawFocusIfNeeded enabled by default
- HTML5
ECMAScript 6 built-in method Array#copyWithin implemented
- HTML5
CSS position:sticky enabled by default
- HTML5
mix-blend-mode enabled by default
- HTML5
New Array built-in: Array.from()
- HTML5
navigator.languages property and languagechange eventimplemented
- HTML5
Vibration API updated to latest W3C spec
- HTML5
CSS box-decoration-break replaces -moz-background-inline-policy
- HTML5
box-decoration-break enabled by default
- DEVELOPER
HiDPI support in Developer Tools UI
- DEVELOPER
Inspector button moved to the top left
- DEVELOPER
Hidden nodes displayed differently in the markup-view
- DEVELOPER
New Web Audio Editor
- DEVELOPER
Code completion and inline documentation added to Scratchpad
- FIXED
32.0.1 - Stability issues for computers with multiple graphics cards
- FIXED
32.0.1 - Mixed content icon may be incorrectly displayed instead of lock icon for SSL sites
- FIXED
32.0.1 - WebRTC: setRemoteDescription() silently fails if no success callback is specified
- FIXED
Various security fixes
- FIXED
Mac OS X: cmd-L does not open a new window when no window is available
- FIXED
Text Rendering Issues on Windows 7 with Platform Update KB2670838 (MSIE 10 Prerequisite) or on Windows 8.1
- UNRESOLVED
Assistive technologies may cause performance issues on Windows XP
What’s New
Known Issues
- FIXED
32.0.3: New security fixes can be found here
- NEW
New HTTP cache provides improved performance including crash recovery
- NEW
Integration of generational garbage collection
- NEW
Public key pinning support enabled
- NEW
View historical use information for logins stored in password manager
- NEW
Display the number of found items in the find toolbar
- NEW
Easier back, forward, reload, and bookmarking through the context menu
- NEW
Lower Sorbian [dsb] locale added
- CHANGED
Removed and turned off trust bit for some 1024-bit root certificates
- CHANGED
Performance improvements to Password Manager and Add-on Manager
- HTML5
drawFocusIfNeeded enabled by default
- HTML5
ECMAScript 6 built-in method Array#copyWithin implemented
- HTML5
CSS position:sticky enabled by default
- HTML5
mix-blend-mode enabled by default
- HTML5
New Array built-in: Array.from()
- HTML5
navigator.languages property and languagechange eventimplemented
- HTML5
Vibration API updated to latest W3C spec
- HTML5
CSS box-decoration-break replaces -moz-background-inline-policy
- HTML5
box-decoration-break enabled by default
- DEVELOPER
HiDPI support in Developer Tools UI
- DEVELOPER
Inspector button moved to the top left
- DEVELOPER
Hidden nodes displayed differently in the markup-view
- DEVELOPER
New Web Audio Editor
- DEVELOPER
Code completion and inline documentation added to Scratchpad
- FIXED
32.0.2 - Corrupt installations cause Firefox to crash on update
- FIXED
32.0.1 - Stability issues for computers with multiple graphics cards
- FIXED
32.0.1 - Mixed content icon may be incorrectly displayed instead of lock icon for SSL sites
- FIXED
32.0.1 - WebRTC: setRemoteDescription() silently fails if no success callback is specified
- FIXED
Various security fixes
- FIXED
Mac OS X: cmd-L does not open a new window when no window is available
- FIXED
Text Rendering Issues on Windows 7 with Platform Update KB2670838 (MSIE 10 Prerequisite) or on Windows 8.1
- UNRESOLVED
Assistive technologies may cause performance issues on Windows XP
What’s New
Known Issues
- NEW
OpenH264 support (sandboxed)
- NEW
Improved search experience through the location bar
- NEW
Slimmer and faster JavaScript strings
- NEW
Search suggestions on the Firefox Start (about:home) and new tab (about:newtab) pages
- NEW
Windows: OMTC enabled by default
- NEW
New CSP (Content Security Policy) backend
- NEW
Support for connecting to HTTP proxy over HTTPS
- NEW
Improved reliability of the session restoration
- NEW
Azerbaijani [az] locale added
- CHANGED
Proprietary window.crypto properties/functions removed
- CHANGED
JSD (JavaScript Debugger Service) removed in favor of the Debugger interface
- HTML5
@counter-style rule from CSS3 Counter Styles specification implemented
- HTML5
DOMMatrix interface implemented
- DEVELOPER
Cubic-bezier curves editor
- DEVELOPER
Display which elements have listeners attached
- DEVELOPER
New sidebar which displays a list of shortcuts to every @media rule in the current stylesheet
- DEVELOPER
Paint flashing for browser content repaints
- DEVELOPER
Editable @keyframes rules in the Rules section of the Inspector
- DEVELOPER
CSS transform highlighter in the style-inspector
- FIXED
Fix incomplete downloads being marked as complete by detecting broken HTTP1.1 transfers (237623)
- UNRESOLVED
PDF.js: With some images, wrong colors could show up. Affects a very small number of PDF
- UNRESOLVED
Some certificate errors cannot be overridden (1042889)
What’s New
Known Issues
- FIXED
33.0.1: Firefox displays a black screen at start-up with certain graphics drivers
- NEW
OpenH264 support (sandboxed)
- NEW
Improved search experience through the location bar
- NEW
Windows: OMTC enabled by default
- NEW
Slimmer and faster JavaScript strings
- NEW
Search suggestions on the Firefox Start (about:home) and new tab (about:newtab) pages
- NEW
Support for connecting to HTTP proxy over HTTPS
- NEW
New CSP (Content Security Policy) backend
- NEW
Improved reliability of the session restoration
- NEW
Azerbaijani [az] locale added
- CHANGED
JSD (JavaScript Debugger Service) removed in favor of the Debugger interface
- CHANGED
Proprietary window.crypto properties/functions removed
- HTML5
DOMMatrix interface implemented
- HTML5
@counter-style rule from CSS3 Counter Styles specification implemented
- DEVELOPER
Cubic-bezier curves editor
- DEVELOPER
Paint flashing for browser content repaints
- DEVELOPER
Display which elements have listeners attached
- DEVELOPER
New sidebar which displays a list of shortcuts to every @media rule in the current stylesheet
- DEVELOPER
Editable @keyframes rules in the Rules section of the Inspector
- DEVELOPER
CSS transform highlighter in the style-inspector
- FIXED
Various security fixes
- UNRESOLVED
Fix incomplete downloads being marked as complete by detecting broken HTTP1.1 transfers (237623)
Resolved in v33.0
- UNRESOLVED
PDF.js: With some images, wrong colors could show up. Affects a very small number of PDF
- UNRESOLVED
Some certificate errors cannot be overridden (1042889)
- UNRESOLVED
Windows: On some combination of hardware and drivers, the main window could be black. In this case, update your graphics drivers (1083071)
What’s New
- FIXED
33.0.2: Fix a startup crash with some combination of hardware and drivers
- NEW
OpenH264 support (sandboxed)
- NEW
Improved search experience through the location bar
- NEW
Windows: OMTC enabled by default
- NEW
Slimmer and faster JavaScript strings
- NEW
Search suggestions on the Firefox Start (about:home) and new tab (about:newtab) pages
- NEW
Support for connecting to HTTP proxy over HTTPS
- NEW
New CSP (Content Security Policy) backend
- NEW
Improved reliability of the session restoration
- NEW
Azerbaijani [az] locale added
- CHANGED
JSD (JavaScript Debugger Service) removed in favor of the Debugger interface
- CHANGED
Proprietary window.crypto properties/functions removed
- HTML5
DOMMatrix interface implemented
- HTML5
@counter-style rule from CSS3 Counter Styles specification implemented
- DEVELOPER
Cubic-bezier curves editor
- DEVELOPER
Paint flashing for browser content repaints
- DEVELOPER
Display which elements have listeners attached
- DEVELOPER
New sidebar which displays a list of shortcuts to every @media rule in the current stylesheet
- DEVELOPER
Editable @keyframes rules in the Rules section of the Inspector
- DEVELOPER
CSS transform highlighter in the style-inspector
- FIXED
33.0.1: Firefox displays a black screen at start-up with certain graphics drivers
- FIXED
Various security fixes
What’s New
- FIXED
33.0.3: Blacklisted graphics drivers that were causing black screens with OMTC enabled (1093863)
- FIXED
33.0.3 Fix two startup crashes with some combination of hardware and drivers (1064107 and 1021265)
- NEW
OpenH264 support (sandboxed)
- NEW
Improved search experience through the location bar
- NEW
Windows: OMTC enabled by default
- NEW
Slimmer and faster JavaScript strings
- NEW
Search suggestions on the Firefox Start (about:home) and new tab (about:newtab) pages
- NEW
Support for connecting to HTTP proxy over HTTPS
- NEW
New CSP (Content Security Policy) backend
- NEW
Improved reliability of the session restoration
- NEW
Azerbaijani [az] locale added
- CHANGED
JSD (JavaScript Debugger Service) removed in favor of the Debugger interface
- CHANGED
Proprietary window.crypto properties/functions removed
- HTML5
DOMMatrix interface implemented
- HTML5
@counter-style rule from CSS3 Counter Styles specification implemented
- DEVELOPER
Cubic-bezier curves editor
- DEVELOPER
Paint flashing for browser content repaints
- DEVELOPER
Display which elements have listeners attached
- DEVELOPER
New sidebar which displays a list of shortcuts to every @media rule in the current stylesheet
- DEVELOPER
Editable @keyframes rules in the Rules section of the Inspector
- DEVELOPER
CSS transform highlighter in the style-inspector
- FIXED
33.0.1: Firefox displays a black screen at start-up with certain graphics drivers
- FIXED
Various security fixes
- FIXED
33.0.2: Fix a startup crash with some combination of hardware and drivers
What’s New
- FIXED
33.1.1 - Fixed startup crash (1021265)
- NEW
Forget Button added
- NEW
Enhanced Tiles
- NEW
Privacy tour introduced
- NEW
Adding DuckDuckGo as a search option