Comment by uallo

9 hours ago

Settings => Search for "Autoplay" => Click "Settings..." => For "Default for all websites" select "Block Audio and Video".

Thank you, I could have sworn I had that active, but for some reason it was "audio only".

  • The about:config settings which you can look up:

        media.autoplay.blocking_policy
        media.autoplay.default
    

    I have mine set to 2 and 5 respectively.