Firefox 4 Release Today (we hope!) Mar 22, 2011 The long awaited Firefox 4 will hopefully be released today, with plenty of [new features][1] and support for HTML 5, CSS 3. I’m really hoping they haven’t rushed out the release to match the recent IE9 release, but the release candidate has been around for a while so lets hope that isn’t the case. I’ve been finding Firefox extremely slow for the last few months so I am glad to see they are bigging-up the performance improvements in this latest version. Online firefox html5 ie web