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

    Ability to re-order existing panels in browser homescreen

  • New

    Added ability to refresh synced tabs on demand

  • New

    Firefox Hub APIs (learn more, examples)

  • New

    mozilla::pkix as default certificate verifier (learn more)

  • New

    Locales added: Assamese [as], Bengali [bn-IN], Gujarati [gu-IN], Hindi [hi-IN], Kannada [kn], Malayalam [ml], Marathi [mr], Oriya [or], Panjabi [pa-IN], Tamil [ta], Telugu [te]

  • 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.

  • Changed

    Last release supporting Android 2.2 and ARMv6 chipset - security updates available through January 2015

  • HTML5

    WebVTT implemented and enabled (learn more)

  • HTML5

    CSS3 variables implemented (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

  • Fixed

    Various security fixes

Known Issues

  • unresolved

    Does not start on Android L preview (see 1030897)