Mozilla has decided to rename the idea of Firefox 3.1 so it becomes Firefox 3.5. Mozilla has decided that a fourth beta will be released on the 14th of April and the release will be named Firefox 3.5. 

Mozilla claims on their developer news site  that the reason for the change is because of the “sheer volume of work” which seems to make it more relevant to make it a bigger release. 

Mozilla confirmed the change in this blog post. They have said they will change the upcoming release to Firefox 3.5 before the next beta is released in April.

We shall have to see what happens when the beta arrives in our download folders, but personally I think that Mozilla just want to make the release stand out more as there is evidently large amounts of work going into it. Hopefully it’ll be something to look forward to, as Firefox is (in my opinion) beginning to fall behind a little as competition from Chrome (and possibly Safari) is falling into place.