In line with its more rapid release schedule, Firefox 5 was released just three months after Firefox 4, which had arrived earlier this year. According to the Mozilla Security Leader, Daniel Veditz, it also means that Firefox 4 will no longer be receiving any more updates, including any for potential security issues.
Several people have repeatedly said in public places (newsgroups, planning meeting, Monday meeting; could not find a blog or wiki page) that Firefox 5 will be the security update to Firefox 4, and that there will be no 4.0.2
Effectively this means that if you use Firefox, you are expected to be running the latest major version; otherwise you will face safety risks with using a browser that will no longer be receiving security patches. With this kind of a strategy, Mozilla has taken more than just the rapid release schedule from Google Chrome; it is also following the Chrome idea of only supporting the latest releases.
In some ways it does make sense, both Firefox 6 and Firefox 7 are expected to arrive this year. Supporting older versions would become very difficult whilst wasting resources that could be going into developing new features.
[Via Digitizor]
