Firefox Release Notes

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

Options panel created for Web Developer Toolbox

Various security fixes

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

Updated Firefox Logo

Improved about:memory's functional UI

Simplified interface for notifications of plugin installation

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

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

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

"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.

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

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

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

New feature in toolbox: Network Monitor

Added unprefixed requestAnimationFrame

Implemented a global browser console

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

Social share functionality

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

If you try to start Firefox using a locked profile, it will crash (see 573369)