* Actually maybe I can contribute right now with some help. There seems to be an issue with firefox.
If you make a profile with out any other settings
```nix
profiles.Foo = {
  id = 0;
  isDefualt = true;
}
```

it writes 

```ini
[Profile0]
Default=1
IsRelative=1
Name=Foo
Path=Foo
```
into `{firefoxConfigPath}/profiles.ini`
but no `Foo` dir is created in `firefoxConfigPath`