Firefox + debian = unable to start track, codec is not supported by remote : bad request

[Buster14]

Running debian 11 + latest firefox 102.12.0esr for HA dashboard and i get this error for my camera stream. Googled and I can't find similar error. It works on nativefier which is supposed to be chromium based, but It seems to be piling up memory usage over time, so i'd thought i give firefox a shot.