Today, Mozilla took it to the next level .... officially releasing Firefox 4 Beta 1 in a blog post and asking for user feedback.
Small emoticons can be used to send comments to Mozilla participating developers.
The latest Firefox sports WebGL support and embraces the Google / Adobe-promoted WebM video format for HD HTML5 video.
A partial list of the numerous changes in Firefox 4 can be found here.
You can download a copy here.