1 point
FWIW, the only ones we share on that list are uBlock, Dislikes and Enhancer.
Again, best guess is Youtube is desperately trying to poop out some ads and getting reinvented within an inch of its life by those extensions (not to mention dragged kicking and screaming into having pop-up playback windows) and something breaks in there somewhere. Iβm not holding my breath for a fix anytime soon.