I have been reading on several forums about conflicts within FF 22 that have not been nailed down yet related mainly with plugins and extensions. I'd suggest going back to a slightly earlier version of Firefox for a while and update your of Flash if needed.
(Personally, I hate this rapid-release kick Firefox has been on. It has made things much more difficult for plugin and extension creators and users... and for many people, the use of plugins is why they use Firefox over other browsers that look just as good from the outside.)