It doesn't. I used to get it working someway back in November, but after I reinstalled OS it didn't work on Gmail anymore with neither Chrome nor Firefox. The result on Android Oreo 8.1 was the same, however I haven't tried it for a few months now, so maybe they have fixed something in the implementation. All I know though is that it recently stopped working in the latest Google Chrome on desktop. The websites nowadays are heavily favoring Bluetooth-based authentication devices, so I fear that this dongle is already obsolete before it was launched. (And I also find it outrageous that most places you cannot overrule sms-based authentication with a key, as I find the GSM network entirely insecure and it should be avoided at all costs, so it is essentially the same as using a standard username/password combo into a keylogger, if an attacker is able to monitor your OTPs.)