Firefox nightly won't start on change networking.hostName.

[Kazimazi]

I changed my hostName, rebuilt my system and it only crashes afterwards.

Firefox: 77
OS: NixOS 20.03 (Markhor) x86_64
Nix: 2.3.4

I have no idea if here is the place to report such issues.

Edit: Problem persists after editing hostName to the original.
unstable.Firefox from nixpkgs works fine.