Screw those ads!
This extension is to mute ads while casting from a browser. Hearing the same song or jingle over and over was driving me up a wall, so this solves that. Simply open up Hulu in your browser, click the extension to ensure it is loaded, and it should work immediately. I have tested with live TV both locally and casted to a Chromecast and it seems to work flawlessly. Please let me know of any issues you find.