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Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the system requirements of this release.

Firefox Beta — English (US)

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31.0beta

Firefox for Android Beta

June 12, 2014

Version 31.0beta, first offered to Beta channel users on June 12, 2014

New

  • Pull-to-refresh on synced tabs page

  • Ability to re-order existing panels in about:home

  • Integration of generational garbage collection

  • Firefox Hub APIs (learn more, examples)

  • OdinMonkey: Use backtracking allocator for asm.js style code

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

  • Partial implementation of the OpenType MATH table (section 6.3.6) see documentation about mathematical fonts and the MathML Torture Test for details

  • 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.

Developer

  • navigator.sendBeacon enabled by default (learn more)

  • New Array built-in: Array.prototype.fill() (learn more)

  • New Object built-in: Object.setPrototypeOf() (learn more)

  • CSP 1.1 nonce-source and hash-source enabled by default

Developer Information

Web Platform

unresolved

  • Does not start on Android L preview (see 1030897)