Hi, I used to use Okey Duo with Protonmail on Firefox just fine.
However now I am not able to auth using it.
The pop up window that appears when I attempt to sign in has changed. It now asks for iphone, ipad, android device or security key. When I select security key, I get three more options (attached image) and the okey light doesn’t turn to blue as it would when awaiting a user input (touch) to authenticate.
Yeah it seems it’s a browser thing as it’s working on Brave for Protonmail.
For more context I wanted to upload more screenshots and describe them but this forum won’t allow me attach more than one picture as relatively new user here.
Thanks anyway.
OP, I’m having a similar problem. I recently set up OnlyKey with Protonmail on Mac OS. I also added an authenticator app & retrieved my recovery code. But I can’t log in with my OnlyKey as 2FA even though nothing else has changed (same computer…). I tried both Firefox & Brave. I keep getting a “wrong credentials” error message. Using a password manager. I can also login fine using same PW manager & 2FA authenticator app on my phone. Alarming. would prefer to use security keys, but if they’re so sensitive to behind-the-scene OS or browser mechanics as I’m reading online, they may not be as robust as I thought.