SOLVED: "Playback failed due to a fatal player error." (Only in Firefox)

[DeNewGuy]

Hello,
I've found a weird issue when trying to play back a file in Firefox, but on the phone app, the desktop app, and on Google Chrome the file will play without a problem.
I tried to look into the logs, but I couldn't really find anything in it.
Hoping anyone can help me get to the roots of this issue.

Here are the pastebins of the jf logs:
Jellyfin Log
FFMPEG Log

I'm running Jellyfin 10.9.11 in a linuxserver docker container.
This is running on Linux Debian 12 (Bookworm)

The platform I'm running my server on:
- Intel Core i5 12600
- ASUS Prime B660 PLUS D4
- 64GB DDR4 Corsair Vengeance RAM
- ASRock Intel Arc A750
- OS Drive: Samsung 980 512GB

My docker-compose is as follows:

Code:

jellyfin:
    image: linuxserver/jellyfin:latest
    container_name: jellyfin
    environment:
      - PUID=1007
      - PGID=1008
      - TZ=Europe/Amsterdam
      - DOCKER_MODS=ghcr.io/jumoog/intro-skipper
    volumes:
      - /home/media-systems/docker-data/jellyfin/config:/config
      - /home/media-systems/docker-data/jellyfin/config.json:/usr/share/jellyfin/web/config.json:ro
      - /var/media/media/movies:/data/movies
      - /var/media/media/stand-ups:/stand-ups
      - /var/media/media/series:/data/series
      - /var/media/media/anime:/data/anime
    devices:
      - /dev/dri:/dev/dri
    ports:
      - 1810:8096
      - 8920:8920/tcp
    networks:
      - reverseproxy-nw
    tty: true
    stdin_open: true
    restart: always

Thanks in advance for any help.