yea YT does suck a bit on FF, but there's some settings to try make it better - turn off the hover preview (https://support.google.com/youtube/thread/130441859/

yea YT does suck a bit on FF, but there's some settings to try make it better - turn off the hover preview (https://support.google.com/youtube/thread/130441859/how-to-disable-hovering-over-thumbnail-keep-hovering-to-play-mini-player-popup?hl=en https://support.google.com/youtube/thread/130441859/how-to-d...). Also try switching to av1 codec, if you have a recent video card (https://arstechnica.com/gadgets/2022/03/firefox-will-efficiently-play-av1-video-if-you-have-a-brand-new-gpu/ https://arstechnica.com/gadgets/2022/03/firefox-will-efficie...), but not sure if it will help much if it's not the video lagging.