I was curious about that, so I looked into it; KeePassXC is having some mixed messages about it: https://github.com/keepassxreboot/keepassxc/issues/1870 https:

I was curious about that, so I looked into it; KeePassXC is having some mixed messages about it: https://github.com/keepassxreboot/keepassxc/issues/1870 https://github.com/keepassxreboot/keepassxc/issues/1870 says "awesome!" https://github.com/keepassxreboot/keepassxc/issues/1996 https://github.com/keepassxreboot/keepassxc/issues/1996 says "go away" and I can't figure out what is going on with https://github.com/keepassxreboot/keepassxc/issues/3560 https://github.com/keepassxreboot/keepassxc/issues/3560 They reference https://github.com/kryptco/kr-u2f https://github.com/kryptco/kr-u2f in one of the issues, but it was bought by Akamai and the code was never under an open source license to begin with :-(