Chrome wouldn’t consider mute tab option ? but they already have an icon in each tab showing you the instances where sound is coming from. “If we provide Chrome controls for content, we are implying that Chrome should take on a responsibility to police content”.
The Web audio API might be the only solution at this point, but it will involve writing out a JS script for each browser.
— i might have to create new webpages through JS with a player embedded in each of them for a particular youtube video, and then route the audio out to a separate channel on Soundflower which could then be connected to SC.