Works on some (about half the games I tested to open/play on FB that were blacking out video), but some certain games still won't work/run on either html5 nor flash video player on Firefox. I'm glad at least some I'm able to run/play now. Some is better than 10% or 20% (for me that's 4 or 5 games out of around 50 or 60) or none.

a tester