I hated having to use a proprietary app for this (even if it was based on the Authy SDK), so this is a nice improvement. I'd really like to see U2F support tho

I hated having to use a proprietary app for this (even if it was based on the Authy SDK), so this is a nice improvement. I'd really like to see U2F support though as well, domains are very valuable assets and deserve the strongest protection possible.