Please, I'm driving myself nuts trying to figure this out lol. I've muted the extension, muted the tabs where they are open, disabled sound in my browser and I still can't get MTS to stop yelling at me when a hit is caught. Is there no way to turn that off? I know I can click "sound" but that doesn't help with one time catches. Thanks!
Get Panda Crazy and switch to HitForker. It's the only way to switch the sound notifications to beeps.