Coturn server's relay canditates are present on Chromium but not on Firefox

Question

I have a coturn server running on a linode instance with the following config:

# listening-ip=private ip
external-ip=public ip
tls-listening-port=5349
listening-port=3478
min-port=10000
max-port=65535

user=something:something
realm=domain.online
lt-cred-mech

pkey=/path/privkey.pem
cert=/path/fullchain.pem

fingerprint
log-file=stdout
verbose

TURNSERVER_ENABLED=1

When I try to test my coturn server on this site https://webrtc.github.io/samples/src/content/peerconnection/trickle-ice/ everything works fine on chromium 122.0.6261.57:

chromium example

but on firefox 123.0 the relay does not work:

firefox example

Any ideas why this happens?

I have checked that the public ip is correct and tried adding a listening-ip property but nothing changed.