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Version history for Mozilla Firefox 64-bit

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Changes for v72.0.2 - v73.0

  • Today’s Firefox release includes two features that help users view and read website content more easily, quickly. Like all accessibility improvements, these features improve browsing for everyone.
  • Firefox has offered a page zoom feature for more than a decade that allows users to set the zoom level on a per-site basis. For users who need to zoom most websites, having to adjust zoom for each new site can be an annoyance. To address this, we have implemented a new global default zoom level setting. This option is available in about:preferences under "Language and Appearance" and can be scaled up or down from 100% as needed and sets the default zoom level for all sites. Per-site zoom is still available to make adjustments to individual sites as needed.
  • Many users with low vision rely on Windows' High Contrast Mode to make websites more readable. Traditionally, to increase the readability of text, Firefox has disabled background images when High Contrast Mode is enabled. With today’s release of Firefox 73, we introduce a “readability backplate” solution which places a block of background color between the text and background image. Now, websites in High Contrast Mode are more readable without disabling background images.
  • Fixed
  • Various security fixes.
  • Improved audio quality when playing back audio at a faster or slower speed.
  • Firefox will now only prompt you to save logins if a field in a login form was modified.
  • Changed
  • WebRender rollout has been expanded to include Windows 10 laptops running NVIDIA graphics cards with drivers newer than 432.00 and screen sizes smaller than 1920x1200.
  • Developer
  • Developer Information
  • WAMP-formatted WebSocket messages (JSON, MsgPack and CBOR) are now nicely decoded for inspection in the Network panel.
  • Web Platform
  • Improved auto-detection of legacy text encodings on old web pages which don’t explicitly declare the text encoding.
  • unresolved
  • Users with 0patch security software may encounter crashes at startup after updating to Firefox 73. This will be fixed in a future Firefox release. As a workaround, an exclusion for firefox.exe can be added within the 0patch settings.


Changes for v69.0 - v69.0.1

  • Fixed external programs launching in the background when clicking a link from inside Firefox to launch them (bug 1570845)
  • Usability improvements to the Add-ons Manager for users with screen readers (bug 1567600)
  • Fixed the Captive Portal notification bar not being dismissable in some situations after login is complete (bug 1578633)
  • Fixed the maximum size of fonts in Reader Mode when zoomed (bug 1578454)
  • Fixed missing stacks in the Developer Tools Performance section (bug 1578354)
  • Security and stability fixes


Changes for v62.0.2 - v62.0.3

  • Fixed hangs on macOS Mojave (10.14) when various dialog windows (upload, download, print, etc) are activated (bug 1489785)
  • Fixed playback of some encrypted video streams on macOS (bug 1491940)
  • Various security fixes


Changes for v50.0 - v50.0.2

  • Various security fixes


Changes for v49.0.2 - v50.0

  • New
  • Updates to keyboard shortcuts
  • Set a preference to have Ctrl+Tab cycle through tabs in recently used order
  • View a page in Reader Mode by using Ctrl+Alt+R (command+alt+r on Mac)
  • Added option to Find in page that allows users to limit search to whole words only
  • Added Guarani (gn) locale
  • Increased availability of WebGL to more than 98 percent of users on Windows 7 and newer
  • Added download protection for a large number of executable file types on Windows, Mac and Linux
  • Improved performance for SDK extensions or extensions using the SDK module loader
  • Playback video on more sites without plugins with WebM EME Support for Widevine on Windows and Mac
  • Fixed
  • Fixed rendering of dashed and dotted borders with rounded corners (border-radius)
  • Various security fixes
  • Login cookies are now saved for sites with a high number of cookies (Bug 1264192)
  • Changed
  • Added a built-in Emoji set for operating systems without native Emoji fonts (Windows 8.0 and lower and Linux)
  • Blocked versions of libavcodec older than 54.35.1
  • The link to check for plugin security updates has been removed from the addon manager as Firefox automatically checks for plugin updates


Changes for v46.0.1 - v47.0

  • New
  • Support for Google’s Widevine CDM on Windows and Mac OS X so streaming services like Amazon Video can switch from Silverlight to encrypted HTML5 video.
  • Enable VP9 video codec for users with fast machines
  • Embedded YouTube videos now play with HTML5 video if Flash is not installed.
  • Allow no-cache on back/forward navigations for https resources
  • Embedded YouTube videos now play with HTML5 video if Flash is not installed
  • Changed
  • FUEL (Firefox User Extension Library) has been removed. Add-ons relying on it will stop working.
  • The browser.sessionstore.restore_on_demand preference has been reset to its default value (true) to avoid e10s performance problems. Because faster is better!
  • The Firefox click-to-activate plugin whitelist has been removed.
  • Developer
  • View, start,and debug registered Service Workers in the Service Workers developer tool
  • Simulate Push messages in the Service Workers developer tool
  • Tilt is available as extension on AMO
  • See Firefox run! Review Firefox performance data in about:performance.
  • 'Start' button for service workers in about:debugging to start registered Service Workers
  • Changes that can affect add-on compatibility
  • Added support for ChaCha20/Poly1305 cipher suites
  • Custom user agents supported in Responsive Design Mode
  • Smart multi-line input in the Web Console
  • HTML5
  • cuechange events are now available on TextTrack objects
  • WebCrypto: PBKDF2 supports SHA-2 hash algorithms
  • WebCrypto: RSA-PSS signature support


Changes for v45.0 - v45.0.1

  • Fix a potential performance regression (Youtube for example) (1220502)
  • Fix a regression causing search engine settings to be lost in some context (1254694)
  • Bring back non-standard jar: URIs to fix a regression in IBM iNotes (1255139)
  • XSLTProcessor.importStylesheet was failing when was used (1249572)
  • Fix an issue which could cause the list of search provider to be empty (1255605)
  • Fix a regression when using the location bar (1254503)
  • Fix some loading issues when Accept third-party cookies: was set to Never (1254856)


Changes for v38.0.5 Beta 1-2 - v38.0.5 Beta 3

  • What’s New
  • NEW: Keep track of articles and videos with Pocket
  • NEW: Clean formatting for articles and blog posts with Reader View
  • NEW: Share the active tab or window in a Hello conversation
  • Known Issues
  • UNRESOLVED: Responsive images do not update when the enclosing viewport changes


Changes for v38.0 Beta 9 - v38.0.5 Beta 1-2

  • What’s New
  • NEW: New tab-based preferences
  • NEW: Ruby annotation support
  • NEW: Share the active tab or window in a Hello conversation - enabled for first half of the beta cycle
  • NEW: Keep track of articles and blog posts with the Reading List - enabled for the first half of the beta cycle
  • NEW: Base for the next ESR release.
  • CHANGED: autocomplete=off is no longer supported for username/password fields
  • CHANGED: RegExp.prototype.source now returns "(?:)" instead of the empty string for empty regular expressions
  • CHANGED: Page load times improved by speculative connection warmup
  • HTML5: WebSocket now available in Web Workers
  • HTML5: Implemented srcset attribute and element for responsive images
  • HTML5: Implemented DOM3 Events KeyboardEvent.code
  • HTML5: Mac OS X: Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube
  • HTML5: BroadcastChannel API implemented
  • HTML5: Implemented Encrypted Media Extensions (EME) API to support encrypted HTML5 video/audio playback (Windows Vista or later only)
  • HTML5: Automatically download Adobe Primetime Content Decryption Module (CDM) for DRM playback through EME (Windows Vista or later only)
  • DEVELOPER: Optimized-out variables are now visible in Debugger UI
  • DEVELOPER: XMLHttpRequest logs in the web console are now visually labelled and can be filtered separately from regular network requests
  • DEVELOPER: WebRTC now has multistream and renegotiation support
  • DEVELOPER: copy command added to console


Changes for v38.0 Beta 8 - v38.0 Beta 9

  • What’s New:
  • NEW: New tab-based Preferences
  • NEW: Share the active tab or window in a Hello conversation - enabled for first half of the beta cycle
  • NEW: Ruby annotation support
  • NEW: Keep track of articles and blog posts with the Reading List - enabled for the first half of the beta cycle
  • NEW: Base for the next ESR release.
  • CHANGED: autocomplete=off is no longer supported for username/password fields
  • CHANGED: RegExp.prototype.source now returns "(?:)" instead of the empty string for empty regular expressions
  • CHANGED: Page load times improved by speculative connection warmup
  • HTML5: WebSocket now available in Web Workers
  • HTML5: BroadcastChannel API implemented (more at hacks.mozilla.org)
  • HTML5: Implemented srcset attribute and element for responsive images
  • HTML5: Implemented DOM3 Events KeyboardEvent.code
  • HTML5: Mac OS X: Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube
  • HTML5: Implemented Encrypted Media Extensions (EME) API to support encrypted HTML5 video/audio playback
  • HTML5: Automatically download Adobe Primetime Content Decryption Module (CDM) for DRM playback through EME (Windows Vista or later only)
  • DEVELOPER: Optimized-out variables are now visible in Debugger UI
  • DEVELOPER: XMLHttpRequest logs in the web console are now visually labelled and can be filtered separately from regular network requests
  • DEVELOPER: WebRTC now has multistream and renegotiation support
  • DEVELOPER: copy command added to console


Changes for v38.0 Beta 6 - v38.0 Beta 8

  • What’s New
  • New: New tab-based Preferences
  • New: Share the active tab or window in a Hello conversation - enabled for first half of the beta cycle
  • New: Keep track of articles and blog posts with the Reading List - enabled for the first half of the beta cycle
  • New: Ruby annotation support
  • New: Base for the next ESR release.
  • Changed: autocomplete=off is no longer supported for username/password fields
  • Changed: URL parser avoids doing percent encoding when setting the Fragment part of the URL, and percent decoding when getting the Fragment in line with the URL spec
  • Changed: RegExp.prototype.source now returns "(?:)" instead of the empty string for empty regular expressions
  • Changed: Page load times improved by speculative connection warmup
  • HTML5: WebSocket now available in Web Workers
  • HTML5: Implemented srcset attribute and element for responsive images
  • HTML5: Implemented DOM3 Events KeyboardEvent.code
  • HTML5: BroadcastChannel API implemented (more at hacks.mozilla.org)
  • HTML5: Mac OS X: Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube
  • HTML5: Implemented Encrypted Media Extensions (EME) API to support encrypted HTML5 video/audio playback
  • HTML5: Automatically download Adobe Primetime Content Decryption Module (CDM) for DRM playback through EME
  • Developer: Optimized-out variables are now visible in Debugger UI
  • Developer: XMLHttpRequest logs in the web console are now visually labelled and can be filtered separately from regular network requests
  • Developer: copy command added to console
  • Developer: WebRTC now has multistream and renegotiation support


Changes for v38.0 Beta 5 - v38.0 Beta 6

  • What’s New
  • New: New tab-based Preferences
  • New: Share the active tab or window in a Hello conversation - enabled for first half of the beta cycle
  • New: Keep track of articles and blog posts with the Reading List - enabled for the first half of the beta cycle
  • New: Ruby annotation support
  • New: Base for the next ESR release.
  • Changed: autocomplete=off is no longer supported for username/password fields
  • Changed: URL parser avoids doing percent encoding when setting the Fragment part of the URL, and percent decoding when getting the Fragment in line with the URL spec
  • Changed: RegExp.prototype.source now returns "(?:)" instead of the empty string for empty regular expressions
  • Changed: Page load times improved by speculative connection warmup
  • HTML5: WebSocket now available in Web Workers
  • HTML5: Implemented srcset attribute and element for responsive images
  • HTML5: Implemented DOM3 Events KeyboardEvent.code
  • HTML5: BroadcastChannel API implemented (more at hacks.mozilla.org)
  • HTML5: Mac OS X: Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube
  • HTML5: Implemented Encrypted Media Extensions (EME) API to support encrypted HTML5 video/audio playback
  • HTML5: Automatically download Adobe Primetime Content Decryption Module (CDM) for DRM playback through EME
  • Developer: Optimized-out variables are now visible in Debugger UI
  • Developer: XMLHttpRequest logs in the web console are now visually labelled and can be filtered separately from regular network requests
  • Developer: copy command added to console
  • Developer: WebRTC now has multistream and renegotiation support


Changes for v38.0 Beta 4 - v38.0 Beta 5

  • What’s New
  • New: New tab-based Preferences
  • New: Share the active tab or window in a Hello conversation - enabled for first half of the beta cycle
  • New: Keep track of articles and blog posts with the Reading List - enabled for the first half of the beta cycle
  • New: Ruby annotation support
  • New: Base for the next ESR release.
  • Changed: autocomplete=off is no longer supported for username/password fields
  • Changed: URL parser avoids doing percent encoding when setting the Fragment part of the URL, and percent decoding when getting the Fragment in line with the URL spec
  • Changed: RegExp.prototype.source now returns "(?:)" instead of the empty string for empty regular expressions
  • Changed: Page load times improved by speculative connection warmup
  • HTML5: WebSocket now available in Web Workers
  • HTML5: Implemented srcset attribute and element for responsive images
  • HTML5: Implemented DOM3 Events KeyboardEvent.code
  • HTML5: BroadcastChannel API implemented (more at hacks.mozilla.org)
  • HTML5: Mac OS X: Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube
  • HTML5: Implemented Encrypted Media Extensions (EME) API to support encrypted HTML5 video/audio playback
  • HTML5: Automatically download Adobe Primetime Content Decryption Module (CDM) for DRM playback through EME
  • Developer: Optimized-out variables are now visible in Debugger UI
  • Developer: XMLHttpRequest logs in the web console are now visually labelled and can be filtered separately from regular network requests
  • Developer: copy command added to console
  • Developer: WebRTC now has multistream and renegotiation support


Changes for v38.0 Beta 3 - v38.0 Beta 4

  • What’s New
  • New: New tab-based Preferences
  • New: Share the active tab or window in a Hello conversation - enabled for first half of the beta cycle
  • New: Keep track of articles and blog posts with the Reading List - enabled for the first half of the beta cycle
  • New: Ruby annotation support
  • New: Base for the next ESR release.
  • Changed: autocomplete=off is no longer supported for username/password fields
  • Changed: URL parser avoids doing percent encoding when setting the Fragment part of the URL, and percent decoding when getting the Fragment in line with the URL spec
  • Changed: RegExp.prototype.source now returns "(?:)" instead of the empty string for empty regular expressions
  • Changed: Page load times improved by speculative connection warmup
  • HTML5: WebSocket now available in Web Workers
  • HTML5: Implemented srcset attribute and element for responsive images
  • HTML5: Implemented DOM3 Events KeyboardEvent.code
  • HTML5: BroadcastChannel API implemented (more at hacks.mozilla.org)
  • HTML5: Mac OS X: Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube
  • HTML5: Implemented Encrypted Media Extensions (EME) API to support encrypted HTML5 video/audio playback
  • HTML5: Automatically download Adobe Primetime Content Decryption Module (CDM) for DRM playback through EME
  • Developer: Optimized-out variables are now visible in Debugger UI
  • Developer: XMLHttpRequest logs in the web console are now visually labelled and can be filtered separately from regular network requests
  • Developer: copy command added to console
  • Developer: WebRTC now has multistream and renegotiation support
  • Known Issues
  • unresolved: Automatic update to RTL languages ( Persian - fa, Hebrew - he and Arabic - ar) are disabled until bug 1150021 is fixed


Changes for v38.0 Beta 2 - v38.0 Beta 3

  • What’s New
  • New: New tab-based Preferences
  • New: Share the active tab or window in a Hello conversation - enabled for first half of the beta cycle
  • New: Keep track of articles and blog posts with the Reading List - enabled for the first half of the beta cycle
  • New: Ruby annotation support
  • New: Base for the next ESR release.
  • Changed: autocomplete=off is no longer supported for username/password fields
  • Changed: URL parser avoids doing percent encoding when setting the Fragment part of the URL, and percent decoding when getting the Fragment in line with the URL spec
  • Changed: RegExp.prototype.source now returns "(?:)" instead of the empty string for empty regular expressions
  • Changed: Page load times improved by speculative connection warmup
  • HTML5: WebSocket now available in Web Workers
  • HTML5: Implemented srcset attribute and element for responsive images
  • HTML5: Implemented DOM3 Events KeyboardEvent.code
  • HTML5: BroadcastChannel API implemented (more at hacks.mozilla.org)
  • HTML5: Mac OS X: Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube
  • HTML5: Implemented Encrypted Media Extensions (EME) API to support encrypted HTML5 video/audio playback
  • HTML5: Automatically download Adobe Primetime Content Decryption Module (CDM) for DRM playback through EME
  • Developer: Optimized-out variables are now visible in Debugger UI
  • Developer: XMLHttpRequest logs in the web console are now visually labelled and can be filtered separately from regular network requests
  • Developer: copy command added to console
  • Developer: WebRTC now has multistream and renegotiation support
  • Known Issues
  • unresolved: Automatic update to RTL languages ( Persian - fa, Hebrew - he and Arabic - ar) are disabled until bug 1150021 is fixed


Changes for v38.0 Beta 1 - v38.0 Beta 2

  • What’s New
  • New: New tab-based Preferences
  • New: Share the active tab or window in a Hello conversation - enabled for first half of the beta cycle
  • New: Keep track of articles and blog posts with the Reading List - enabled for the first half of the beta cycle
  • New: Ruby annotation support
  • New: Base for the next ESR release.
  • Changed: autocomplete=off is no longer supported for username/password fields
  • Changed: URL parser avoids doing percent encoding when setting the Fragment part of the URL, and percent decoding when getting the Fragment in line with the URL spec
  • Changed: RegExp.prototype.source now returns "(?:)" instead of the empty string for empty regular expressions
  • Changed: Page load times improved by speculative connection warmup
  • HTML5: WebSocket now available in Web Workers
  • HTML5: Implemented srcset attribute and element for responsive images
  • HTML5: Implemented DOM3 Events KeyboardEvent.code
  • HTML5: BroadcastChannel API implemented (more at hacks.mozilla.org)
  • HTML5: Mac OS X: Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube
  • HTML5: Implemented Encrypted Media Extensions (EME) API to support encrypted HTML5 video/audio playback
  • HTML5: Automatically download Adobe Primetime Content Decryption Module (CDM) for DRM playback through EME
  • Developer: Optimized-out variables are now visible in Debugger UI
  • Developer: XMLHttpRequest logs in the web console are now visually labelled and can be filtered separately from regular network requests
  • Developer: copy command added to console
  • Developer: WebRTC now has multistream and renegotiation support
  • Known Issues
  • unresolved: Automatic update to RTL languages ( Persian - fa, Hebrew - he and Arabic - ar) are disabled until bug 1150021 is fixed


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