See what’s new in Firefox!

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

May 1, 2014

Version 30.0beta, first offered to Beta channel users on May 1, 2014


  • Mac OS X command-E sets find term to selected text


  • Ignore autocomplete="off" when offering to save passwords via the password manager (see 956906)

  • TypedArrays don't support new named properties (see 695438)


  • Disallow calling WebIDL constructors as functions on the web

  • 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)


  • Support for GStreamer 1.0 (see 806917 for build configuration)

  • Fixes to box-shadow and other visual overflow (see bug 480888)

  • Mute and volume available per window when using WebAudio

  • background-blend-mode enabled by default

  • Use of line-height allowed for <input type="reset|button|submit">

  • ES6 array and generator comprehensions implemented (read docs for more details)

  • Error stack now contains column number

  • Support for alpha option in canvas context options (feature description)

Developer Information


  • Without affecting security, after restoring your session, Extended Validation Certificates might not display (See 995801)

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

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

  • Exit is not always completed when "clear history when Firefox closes" is enabled (1005487)

  • Text Rendering Issues on Windows 7 with Platform Update KB2670838 (MSIE 10 Prerequisite) or on Windows 8.1 has a workaround (see 812695)