My god this thing is loud. Also, at least on OSX, there is no way to lower the volume/mute that tab, individually(or even all of Firefox?!, which is insane, eve

My god this thing is loud. Also, at least on OSX, there is no way to lower the volume/mute that tab, individually(or even all of Firefox?!, which is insane, even Windows has the built-in). Can you add some kind of volume control? Or at least a mute button :)