Firefox Notes

First offered to Release channel users on August 16, 2013

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 extend a special thank you to all of the new Mozillians who contributed to Firefox 23!

New Features

  • New

    Options panel created for Web Developer Toolbox

  • New

    Mixed content blocking enabled to protects users from man-in-the-middle attacks and eavesdroppers on HTTPS pages (learn more)

  • Changed

    <input type='file'> rendering improvements (see bug 838675)

  • Changed

    "Load images automatically" and Always show the tab bar" checkboxes removed from preferences and reset to defaults. Want to hide one tab? Try this add-on.

  • Changed

    Replace fixed-ratio audio resampler in webrtc.org capture code with Speex resampler and eliminate pseudo-44000Hz rate

  • Changed

    CSP policies using the standard syntax and semantics will now be enforced

  • Changed

    Users can now switch to a new search provider across the entire browser

  • Changed

    Enabled DXVA2 on Windows Vista+ to accelerate H.264 video decoding

  • Changed

    Simplified interface for notifications of plugin installation

  • Changed

    Improved about:memory's functional UI

  • Changed

    Updated Firefox Logo

  • Changed

    "Enable JavaScript" preference checkbox has been removed and user-set values will be reset to the default

  • Developer

    Implemented a global browser console

  • Developer

    Write more accessible pages on touch interfaces with new ARIA role for key buttons

  • Developer

    Social share functionality

  • Developer

    HTML5 <input type="range"> form control implemented

  • Developer

    Added unprefixed requestAnimationFrame

  • Developer

    New feature in toolbox: Network Monitor

  • Developer

    Dropped blink effect from text-decoration: blink; and completely removed <blink> element

  • Fixed

    Various security fixes

  • Fixed

    23.0.1 - Audio static/"burble"/breakup in Firefox to Firefox WebRTC calls

  • Fixed

    23.0.1 - Spellchecking broken with non-ASCII characters in profile path

  • Fixed

    23.0.1 - Rendering glitches on H.264 video only in FF23 on Vista

Known Issues

  • unresolved

    If you try to start Firefox using a locked profile, it will crash