Stando alle ultime indiscrezioni arrivate direttamente dai dev di mozilla, Firefox 4 Final verrà rilasciato il 22 Marzo 2011.
March 22nd is the day we would ship.  Both IT and Marketing have indicated that March 22nd is an acceptable final launch date.  If at any time we discover issues that would block final release, we would issue an RC2 as soon as possible, reset the ship date, and communicate to everyone.
E io aggiungo finalmente!