Firefox Extensions?

Are there any good firefox extensions that turn down the volume on games, so I can like, play a flash game and have my music in the background w/o having to pause winamp for the audio in the flash?

This would be very helpful in place of having to hear both the flash and the winamp at the same time. Also, is firefox on a different audio line on the PC? Cause if so I can just adjust that in my volume settings on windows.

Thanks for reading, y'all

>>10
Ah total failure. Guess what? The net doesn't belong to you. What the fuck right do you have to decide what is and is not on a webpage? None whatsoever. Don't like part of the content? Fuck off then.