Got a new computer running latest version of Firefox 89.0.2 64 bit.

Tried YouTube and CNN, when I open a video there's audio. When I scrub (move to another time on the video) to another timestamp, the audio is gone. Dailymotion has no audio at all. I tried Spotify Player, there's audio when I play the song but if I try to scrub, playback itself fails. Chrome works perfectly fine and my old computer with the same version and setup has no trouble at all. Please help!