Since some time I have to delete the "Authentication Decisions" in Settings / Privacy & Security / View Certificates when using another smart card. Previously one was prompted for which Certificate to use each time one started a session. This allowed users who have to use more than one smart card to connect without having to go to Settings / Privacy & Security / View Certificates, then in the Certificate manager delete the previous Authentication decisions. Another problem with this behaviour is that using the previuously remembered smart card one is just prompted for a PIN, whithout any indication for which certificate that requested PIN would be. One can still use Firefox but it has become much more cumbersome.