I recently upgraded Firefox from 3.0 to 3.5. Since then I have a lot of trouble running this app. It freezes after 1 sec and stops responding to any commands.

How can I make it work again? If there's no known fix for it, where can I still download the older 3.0 version?


According to Frans Bouma's blog it´s a bug/feature in the random number generator of the Network Security System (NSS) used by FF3.5. In a few words: NSS reads the files in the system temp folder to use as seeds for the randomization.


Try disabling all your add-ins first. If it still doesn't work, go with an older version using the link from Zoredache.

  • The very annoying thing is that now, Firefox 3.0 has the exact same symptoms. It freezes after 2s. Can it be that the random generator component remained installed the machine? – cmserv Jul 15 '09 at 16:58

Did you try it with a different profile? If you start firefox with the argument "-p", the profile manager pops up. You can create a new profile there and use that profile to see if it works. If it does, it means that your previous profile was corrupted in some way.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy