idk, i disable Lastpass and problem gone. In Firefox same problem: Scenario in the extension "Lastpass: Free Password Manager" slows down Firefox I think problem whith Lastpass auto fill

Ok. I find problem and this Lastpass extension. Why is this happening? And how to fix it?

WTF, guys, speedrun.com/games tab use 80-100% cpu. Try search game - cpu load 100% ~1 min, load page - cpu load 100% - few minutes. it only happens on speedrun.com/games