@jmto said in Vivaldi does not prompt for certificate authentication (PIV card):
Looking at the OS side the "Manage User Certificates" will show them. So know I understand, Firefox isn't capable for some reason using OS certificates, it needs to be told/load that provider so that it can get the certificate, but then as Chrome supports, why does not Vivaldi.
interesting, i'll have to try what you did next time i'm in vivaldi on macos for work.
that said, with firefox, there is a flag in about:config you need set. Set security.osclientcerts.autoload to true, and firefox should properly talk to the cert store and load the certs (at least that is what seemed to fix cert errors for me wrt firefox). why that isnt on by default, i have no idea...