"Mozilla released a new Firefox 4 prototype late Monday that builds in support for Google's WebM video technology and several other changes planned for the open-source Web browser's next major version.

With WebM, Google hopes to liberate Web video from patent-related royalty constraints of today's prevailing video compression technology, H.264. Mozilla and Google are working to make WebM's VP8 codec a standard part of the new specification for built-in video being added to the HTML5 Web page design technology."

Source - Cnet

Since this is an Alpha release, it's only recommended for users who are aware of the consequences.

I'd prefer that they worked on such features as "Not being a ravenous memory hog" that has been an issue since 2.0

I'd prefer that they worked on such features as "Not being a ravenous memory hog" that has been an issue since 2.0

Mozilla says it's an intended feature due to memory caching.

Reducing memory usage

May help memory leak

More memory leak remedies

Interesting info on 3.6 leak and interference from other applications.

Another thing would be allowing me to chose to view a site with an invalid or expired certificate. I don't like being babysat but whenever I make that case to Mozilla they seem to think thats exactly what I need. Thank goodness for IEtab.