"High GPU Usage/ Laggy Scrolling/ Low FPS" issues

I tried all solutions on this sub, like the "gfx.webrender" settings and hardware acceleration and much much more but nothing worked.

The problem can be reproduced in Librewolf too. Just like Zen it consume so much GPU for some reason, and this makes them non usable.

Floorp and Firefox on the other hand are super smooth and stable.

I use Intel Graphics with Windows 11 but that shouldn't be an excuse for the problem because it runs fine on Firefox and Floorp, and also some people with nvidia gpus had experienced this problem.

Bad optimization I guess.