Sync error between android and firefox

MSG: Ice connection failed.
NAME: Error
value@[native code]

I don’t have permissions to edit my posts yet (and the above was generated by the app), but can confirm that I still can’t sync between Android and Firefox due to a timeout.

And this even after changing my Linux distro a more standard one and a fresh install of Firefox (see [SOLVED] How to restore on a new computer & then back up? for details).

This happens regardless whether both devices are on the same WiFi or the laptop is tethered to the phone.

Hmm, just remembered …could it be the firewall? What ports do need to be open on the laptop/desktop’s firewall?