I've been using Firefox for a long time, but recently, browsing YouTube has become a nightmare. The newsfeed lags significantly and scrolling is not smooth at all. Interestingly, the same site works perfectly fine on Brave and Chrome. I've tried clearing the cache, but the stuttering persists. Please optimize the hardware acceleration and AV1 decoding for mobile devices. Hoping for a fix in the next update! Also sometimes YouTube videos don't play. But the same video plays in another browser on the same internet.