This is awesome. One of my biggest gripes with Chrome is the inability to stop a rogue site from playing audio (on top of the music I'm listening to in another

This is awesome. One of my biggest gripes with Chrome is the inability to stop a rogue site from playing audio (on top of the music I'm listening to in another tab). CNN is one of the worst, as soon as I find the freaking video on the page and try to pause/mute it, the video controls slide away. Why can't Chrome allow me to just turn off audio on that tab? I have assumed Google doesn't give us that because it will interfere with their advertising or something. (maybe there is an extension that will help? I haven't found one)