I really like Firefox but unfortunately it doesn't run well on my machine. I have Ryzen 2700X, geforce 1080 Ti, running current Ubuntu but firefox is using 1 f

I really like Firefox but unfortunately it doesn't run well on my machine. I have Ryzen 2700X, geforce 1080 Ti, running current Ubuntu but firefox is using 1 full CPU at 100% (load is moving from one core to another) and constantly lags. Researched a lot for any similar problems but couldn't find any solution. Has anyone seen anything like this and maybe even solved it?