Unfortunately, the extension doesn't work correctly anymore. It seems to extend the time the video plays somewhat, but it still stops after a while. At the same time, it's got a bug where a YouTube tab can enter an indefinite reload cycle.

With this extension enable any playlist I try to listen to does not play in sequence and instead jumps around up and down the list as if I have shuffle toggled on. Weirdly this does not happen with the Google Chrome version of this addon by the same developer.

This makes your playlist always play in shuffle mode. What's the point of using it then...

Puts youtube into a refresh loop.

put youtube into a constant refresh loop, which i could only stop by removing it.

Doesnt work constant reloads youtube
very bad
many such chases

Doesn't work anymore since YouTube changed their lay-out. It does not loop or shuffle playlist. Also the play/pause button got stuck after a long time playing a video in the background
Found another one that works: YT Nonstop (is has 'ytnonstop' in the url and is made by JohnyP)

Disable Autoskip, AutoLoop and AutoShuffle don't work for a very long time.

Causes Firefox to use 30-40% of CPU and use +14GB of RAM. Completely unusable.

Not open source. Why??

one day after I installed it, pause is back