Only works on the first video I watch, that I select from my home page. After that, it doesn't work at all.

I'm on win 10 64bit

Doesn't work with the YouTube "Queue" playlist feature that lets you add videos to the list via right click. The next video just plays anyway. If you're writing a comment and the video currently playing on the page ends before you're done, you lose your work unless you click the back button right away.

My Build: Firefox 84, 64 bit | Windows 7 Ultimate, 64 bit
Possible Conflicting Extensions I Have Installed: Enhancer For YouTube, Tab Unloader