I'm not really understanding the issue you have. Logging in (if you are not already) is just click - fingerprint (or other) - click. To me it looks comfortable, and it's 2FA in a single step. I also don't know what you mean with "one time device", I guess it's like using a device as a guest. In that case, there is the "Sign in with roaming device" option, which connects to your phone through NFC or Bluetooth to let you authenticate. This sounds way more convenient to me than saying "Sorry grandma, could you please let me install my password manager because without it I'm busted and let me type my super complex master password". But, everyone their preference. No worries. ...or perhaps you missed that option, there is certainly some UI improvements I could do on my side to make it more intuitive.
I didn't mean using mobiles here at all. I can't imagine a situation when you need to log in from someone else's phone. Here, I talked about computers, and with them, I always use just anonymous mode in browser, log in into my password manager, and have access to all my accounts everywhere.
"Sorry grandma, could you please let me install my password manager because without it I'm busted and let me type my super complex master password"
Password manager has web version... And I said it's good to have log in with social network, but not to force it. Same as you shouldn't force login only by password and email.
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I'm not really understanding the issue you have. Logging in (if you are not already) is just click - fingerprint (or other) - click. To me it looks comfortable, and it's 2FA in a single step. I also don't know what you mean with "one time device", I guess it's like using a device as a guest. In that case, there is the "Sign in with roaming device" option, which connects to your phone through NFC or Bluetooth to let you authenticate. This sounds way more convenient to me than saying "Sorry grandma, could you please let me install my password manager because without it I'm busted and let me type my super complex master password". But, everyone their preference. No worries. ...or perhaps you missed that option, there is certainly some UI improvements I could do on my side to make it more intuitive.
I didn't mean using mobiles here at all. I can't imagine a situation when you need to log in from someone else's phone. Here, I talked about computers, and with them, I always use just anonymous mode in browser, log in into my password manager, and have access to all my accounts everywhere.
Password manager has web version... And I said it's good to have log in with social network, but not to force it. Same as you shouldn't force login only by password and email.