If you’ve ever had the Macromedia Flash Player stop working after upgrading Firefox, I’m sure you have an idea how frustrating it can be to find out the culprit or even try to google for fixes. I had the same problem again after upgrading to Firefox 1.5, but luckily I came across this great thread on how to fix Flash in Firefox.

If all else fails, I’ve also had good luck with uninstalling Flash and starting a new Firefox profile, and then reinstalling Flash. That is usually the last thing to try as it’s quite a pain, but it does seem to work every time.