Mozilla is currently working on four different versions of its open source browser, albeit the focus of the development process falls on a single one, the next major iteration of Firefox. A preview version of Firefox 3.7 Alpha 3 is currently available for download. Early adopters can grab the bits from Mozilla’s FTP servers
. However, it is important to note that the current release of Firefox 3.7 Alpha 3 is not the fully fledged Alpha 3 development milestone, but just a nightly Build instead. It is highly probable that Firefox 3.7 Alpha 3 will be delivered by the end of this week, although Mozilla has confirmed nothing officially in this regard.