Higher priority should be to mute websites that don't have media content. Two ideas: Either make it permission based like location, or have a master volume set

Higher priority should be to mute websites that don't have media content. Two ideas: Either make it permission based like location, or have a master volume setting for sounds like rely on javascript (excluding html5, flash, etc.). I'm not 100% sure about the details for the latter, but that'd be very convenient. I'm almost always caught off guard when a customer service widget pops up on the bottom right corner of the screen with an annoying bell sound.