From the month of April 2011 Mozilla is Continuously releasing and updating different versions of Firefox. Every six weeks a new version of Firefox get released . There are four different versions of Firefox . Those are – Nightly , Aurora, Beta and Release .
Nightly- A lot of things are experienced with. This is Intended only for developers and Testers.
Aurora – New testing Phase. Mainly for Programmer but casual user can try it.
Beta- Will tested ersion that can be used by general users.
Release – Finished version which only gets updates and bug fixing after release.
Here I want to show you an Image which shows the Mozilla Firefox Release dates of versions starting from 5 till 16 (Nightly, Aurora , Beta , Final Release).
So Mozilla is Going to release its new versions in every Six Weeks and it will continue.