Comment 14 for bug 1862760

Generally speaking we don't know what country a device is operating in, so we default to the world domain which should be safe throughout the world. The AP may send a hint to the client as to what regulatory domain to use, but many APs do not do this.

Also note that on many desktop systems now the regulatory domain is managed by the wireless card firmware, which is why you may see the domain set there even if the AP does not send a hint.