With hrev55907, I’ve merged initial support for USB WiFi adapters, and enabled them in the realtekwifi
driver. I tested it with one device myself (an 8812AU
, to be precise) and it seems to work sufficiently; I was able to connect to a WPA2 network and browse the web.
Note that hot-plugging is not currently supported, you have to plug in dongles before booting! (You similarly cannot re-plug devices either.)
Lots of USB WiFi adapters are Realtek-based even if they’re under some other brand name, so if you have one, see if it works. (If it doesn’t, and it looks like FreeBSD supports it, open a ticket, as I should now be able to port drivers for other USB adapters that FreeBSD has, once the dust settles a bit.)