One day out of the blue, Firefox SSL stopped working on OSX. OSX very helpfully prompted me with the message that I should fix the issue and relaunch the application. Reinstalling Firefox did not resolve the issue. I ended up deleting my Firefox profile under ~/Library/Application Support/Firefox. This resolved the issue, however I lost all the addins that I had installed in Firefox.After reinstalling all the addins, i made a backup of my Firefox profile, so that in the future if the SSL issue should reoccur I can simply switch to the backup profile without losing any of my addins!