Firefox Beta Notes

Version 36.0beta, first offered to Beta channel users on January 15, 2015

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.

What’s New

  • New

    Pinned tiles on the new tab page can be synced

  • New

    Support for the full HTTP/2 protocol. HTTP/2 enables a faster, more scalable, and more responsive web.

  • New

    Locale added: Uzbek (uz)

  • New

    New preferences implementation enabled for the first half of the beta cycle

  • Changed

    The Flash protected-mode sandbox is disabled on Windows, to evaluate the stability impact of protected mode

  • Changed

    -remote option removed

  • Changed

    No longer accept insecure RC4 ciphers whenever possible

  • Changed

    Phasing out Certificates with 1024-bit RSA Keys

  • Changed

    Shut down hangs will now show the crash reporter before exiting the program

  • Changed

    Add-on Compatibility

  • HTML5

    Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube.

  • HTML5

    Support for the ECMAScript 6 Symbol data type added

  • HTML5

    unicode-range CSS descriptor implemented

  • HTML5

    CSSOM-View scroll behavior implemented allowing smooth scrolling of content without custom libraries

  • HTML5

    object-fit and object-position implemented.
    Defines how and where the content of a replaced element is displayed

  • HTML5

    isolation CSS property implemented.
    Create a new stacking context to isolate groups of boxes to control which blend together

  • HTML5

    CSS3 will-change property implemented.
    Hints the browser of elements that will be modified. The browser will perform some performance optimization for these

  • HTML5

    Changed JavaScript 'const' semantics to conform better to the ES6 specification.
    The const declaration is now block-scoped and requires an initializer. It also can not be redeclared anymore.

  • HTML5

    <meta name="referrer"> implemented for more privacy. Allows to control the content of the HTTP referer header.

  • HTML5

    Improved ES6 generators for better performance

  • Developer

    Eval sources now appear in the Debugger
    Debug JavaScript code that is evaluated dynamically, either as a string passed to eval() or as a string passed to the Function constructor

  • Developer

    DOM Promises inspection

  • Developer

    Inspector: More paste options in markup view

  • Fixed

    CSS gradients work on premultiplied colors

  • Fixed

    Fix some unexpected logout from Facebook or Google after restart