As part of Mozilla’s new rapid release development process the beta development channel has been updated with a Firefox release candidate. For detailed information about the changes please visit:

Firefox: http://www.mozilla.com/firefox/6.0beta/releasenotes/
Firefox mobile: http://www.mozilla.com/mobile/6.0beta/releasenotes/

We highly encourage add-on developers to test their add-ons with the new version and mark them as compatible as soon as possible. The Mozilla Developer Network has detailed information about changes in the new version for add-on developers.

To manually download the latest pre-release software from the various development channels, please visit:

Firefox: http://www.mozilla.com/firefox/channel/
Firefox mobile: http://www.mozilla.com/m/firefox/channel/
As always, the latest released version of Firefox can be downloaded from http://firefox.com

What’s New in Firefox Beta
The latest version of Firefox Beta has the following changes:

The address bar now highlights the domain of the website you're visiting
Streamlined the look of the site identity block
Added support for the latest draft version of WebSockets with a prefixed API
Added support for EventSource / server-sent events
Added support for window.matchMedia
Added Scratchpad, an interactive JavaScript prototyping environment
Added a new Web Developer menu item and moved development-related items into it
Improved usability of the Web Console
Improved the discoverability of Firefox Sync
Reduced browser startup time when using Panorama
Please see the complete list of changes in this version. You may also be interested in the list of changes in the previous version.