I have about 25 extensions (almost all needed) and firefox lags like crazy, it's like I'm watching the videos at 10 fps. I download chrome to test it out and sure enough it runs as smooth as butter. Any help?
EDIT: It somehow fixed itself after I started using LibreWolf (with the same addons)
ryzen 5 5600
whats ur gpu? try reinsinstalling the drivers using DDU.
also make sure hardware acceleration is enabled in the settings.