Doesn't seem to work for me either

Doesn't seem to work for me. Both video and audio play, regardless of activation status.

This extention no longer works as of Aug 22, 2021. It will keep refreshing the video over and over again.

it does turn off the video and is audio only, but it wont awitch off except in the add ons control menu firefox 88.0.1 I have to disable it when i want to watch videos.

Sadly doesn't work for live streams.