The question is about TLS client authentication using a browser. I have been using a smart card to authenticate to certain web sites. However, the card is a bit old and for whatever reason importing certificates does not work anymore.
Now I have a new certificate and the key pair is still on the card. Is it somehow possible to use the certificate in the browser (preferably Firefox) for authentication? Now Firefox complains if I try to import the certificate that I do not own the private key.