Audio Desync in H264 MP4 in Firefox

[Smig]

Hello,

I have a problem with playing some .mp4 files in Jellyfin. The Audio seems to be getting instantly desynchronized with video, doesn't matter if I'm skipping or not.

I'm running Jellyfin in a docker container. I think this is a problem with Firefox? I do not have the above issues when I'm playing that file through the default video player on my system, instead of via Jellyfin webplayer. I also do not have this problem in Brave browser. Is there anything I can do setup wise so I can continue to use Firefox for daily use and Jellyfin?

Here are the Playback info in Jellyfin:


My system specs: LinuxMint 21, Ryzen 3 4350G (transcoding is setup correctly I think, but as you can see here it is directly playing).

[TheDreadPirate]

When you say "Jellyfin web player" did you mean Jellyfin Media Player, the full desktop client?