It was working fine, until this morning Rated 1 out of 5 stars
I don't know what happened, but all of a sudden it doesn't work at all anymore. I had 5 videos up & they all started playing at the same time! I hope you fix this soon or i'm gonna have to uninstall, it's really annoying!~This review is for a previous version of the add-on (18.104.22.168-signed.1-signed).
Go to https://addons.mozilla.org/firefox/addon/stop-youtube-autoplay/versions/ and install version 1.0.3.