Youtube is awfully slow on firefox. Any fix?

I started using firefox and surprisingly it now have become my daily tool. I do most of my studies from this only. But from past few days, youtube on firefox is awfully slow, I press space to pause, and it takes 3-4 seconds to respond, same while forwarding or going back, it even lags when I click on the gear icon to change speed. Every other website is working smoothly, even my laptop has decent specs, so something is wrong with youtube for sure. It sucks using it now. Extensions I use - Ublock, Temp mail, dark reader, Video speed controller, Adaptive Tab bar color.