At least three people asked to add mute and volume controls to keySharky, so I was left without other choose then to add them. Like always Firefox add-on will take time to receive review before it start to automatically update itself, but you can already install it. Google Chrome and Safari should already try to update it for you.
You can download keySharky 1.5.2, if you don’t have it already, to try it out:
If you have issues, please leave them here and I will try to figure out whats wrong.