There is no official release date as yet, but Mozilla's vice president of engineering announced on the Mozilla Developer Center blog that they are hoping for a release date in late May. Firefox has made big waves in the web browser market over the last few years and - according to a BBC blog by Rory Cellan-Jones - Mozilla Europe's President, Tristan Nitot claims it is getting close to a 30% share of the browser market. It seems that clear that Firefox has taken a big dent out of Microsoft's browser monopoly in the ongoing Firefox/Explorer battle.
Providing users with new and innovative features is what has kept Firefox ahead of the game, allowing it to compete with a browser that is already installed on most computers when purchased. It's no surprise to hear that there are a host of new features in the newest version.