Very useful for quick tab-switching, thank you! :D

работает

It's working for me....

Somehow works - but always lets the video play for a couple seconds, then reloads the page and then disables the video on the reloaded page...

Perfeito.

Does not work. FF 54 32-bit, Linux Mint, Cinnamon desktop. Autoplay always on, has to be manually turned off thus making this add-on useless.

Not working.