I talked to someone about firefox and sound turning off on some websites. I am using windows 7. They said it was my driver. I re installed the driver and the same thing happens. When I play some games the sound driver will kick out and I have to restart my computer to get sound back. I went to my dads and used his Imac with firefox and played the same games and the sound kicked out also but I did not have to restart the mac to get the sound back. So it must be a problem with firefox. Can you guys check it out. Thank, Rodney