Yubikey Firefox

Configure yubikey for Firefox PKCS11

Follow the instructions on https://wiki.archlinux.org/title/Common_Access_Card

Install ccid and opensc.

Execute

systemctl enable --now pcscd.socket

Navigate to Edit > Preference > Advanced > Certificates > Security Devices and click Load to load a module using /usr/lib/opensc-pkcs11.so or /usr/lib/pkcs11/opensc-pkcs11.so.