WigerToods2010: Have to say that at the moment I'm using FF 50.1.0 alongside AF ver 24.0.0.194 and the game plays perfectly well this end. I've also noticed an improvement in the actual graphics displayed on screen - things just appear to be more detailed.
Johnny I decided to try Firefox again trusting your judgement. it took only 1 CTTH round to see that at least on my PC it is not very good. The meter ran smooth for 1/4 of the meter then the final 3/4 it stuttered so badly that I couldn't even come close to hitting the ding. I get virtually no stutters with Comodo Dragon , Comodo Ice Dragon or FlashPeak Slimjet . Though I will admit that CD and Slimjet are very old versions that use NPAPI flash instead of PPAPI pepper flash.
In fact most of the Mozilla based browsers that I have tried are even better than Firefox on my PC. Those being Maxthon 3 Maxthon cloud Maxthon 5 and Sea Monkey.