Can't hear in Firefox in Vista?

Question:I got Vista a while ago but ever since I got it no sound would come out of firefox (it would come out of my itunes and internet exploerer) but just not firefox. I remmeber awhile back some games I used to play didn't have sound off option and I was listenting to my itunes so i clicked the volume and clicked mixer and lowered Firefox's volume slot, but whenever I made it higher it would't work. There are some random times when it works but maybe like 1 out of 100 times...help?

I don't want to reinstall XP either.

Answers:
I have Firefox on my computer w/ Vista, and I have no sound problems, so it might be a problem with your computer. Contact Microsoft or the maker of your computer and see if they know what the problem might be.