works a treat when it works.... some sites are broken where videos wont even load, and some gifs wont autoplay. took me a while to figure out it was this addon. turning it off and on in the addon itself wont work, has to be enabled and disabled via firefox. best example i have is steam.com and discord.com. works fine on youtube and others tho.. ill keep using it for now, and turning it off and on accordingly. shame for the inconvenience, cuz it really does work a treat when it works..