how do i play the games with firefox? all say game not loading

[Dat Gyrl Vida]

1. What is your OS? .
2. What is your browser? Example Firefox 3.5, Internet Explorer 7, etc.
3. Post a link to one game you are having problems with.
4. What Play Mode is causing the problem? Example ArcadeOX Score, Java Full, etc.
5. Has it ever worked correctly before?
6. Describe the problem.

1. Windows XP
2. Firefox 3.6.7
3. numerous street fighter games and super mario 3
4. Arcade OX
5. This is the first time I have really tried to play
6. the game will start to load then say game did not or cannot load ..


I don't think I have arcade ox on my addons .. how do i do that maybe? and also how do I convert it to play with a microsoft sidewinder plug n play gamepad?

thank u in advance