No matter how often I check the volume mixer and confirmed that it was indeed up, Firefox refuses to play audio on videos or music streaming. I updated Adobe Flash as well and nothing happened. I don't want to start downloading random stuff because I don't really know what I'm doing, but I really don't know how to fix this. Any help is greatly appreciated :) == This happened == Every time Firefox opened == I opened Firefox one day and Youtube, playlist.com, etc. refused to play audio.