Google Chrome have such nice feature like media-control via functional keys, can you implement sound integration on Firefox, please? I have some functional keys on my notebook, which are responsible for playing, its: fn + ((arrow left) - previous track, (arrow right) - next track, (arrow down) - pause/play, (arrow up) - stop, (f10) - switch off sound ON A TAB, (f11) - volume down ON A TAB, (f12) - volume up ON A TAB. Well, it`s very comfortable in use. I know, thousands of users will be glad to welcome this.