Firefox Notes

Version 31.0, first offered to Release channel users on July 22, 2014

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

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

What’s New

  • New

    Add the search field to the new tab page

  • New

    Support of Prefer:Safe http header for parental control (learn more)

  • New

    mozilla::pkix as default certificate verifier (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

    Block malware from downloaded files (learn more)

  • 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

    navigator.sendBeacon enabled by default (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

    Dialogs spawned from the onbeforeunload event no longer block access to the rest of the browser

  • Fixed

    Various security fixes

  • Fixed

    Search for partially selected link text from context menu (985824)

Known Issues

  • unresolved

    Mac OS X: cmd-L no longer opens a new window when no window is available (1008793)

    Resolved in v32.0a2

  • unresolved

    Slow shut downs lead to 'Firefox is already running' warning (see 966469 and 985655)

  • unresolved

    GNU/Linux and Windows XP: Google Maps Street View displays a black screen (1034593)

    Resolved in v32.0a2

  • 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

    PDF.js: With some fonts, some characters might not be displayed. Affects a very small number of PDF (1028735)