The YouTube Auto Pause Blocker was installed and the media.hardwaremediakeys &
dom.media.mediasession keys were set to enabled as directed.
The YouTube "Video paused. Continue watching?" box opens and stops the music. This add-on is not worked as listed.
The developer lawfx states: If you have any problems, don't hesitate to drop me an email. However, no email address appears to be listed. Requesting assistance on this, please.
Firefox version: 119.0.1