I made a fresh installation of Ubuntu 22.04 and successfully imported the personal certificate into Firefox. If my memory serves me well, Okular accessed Firefox's NSS database with certificates located in a shared folder (docs). Since they are both served as Ubuntu snaps, they can no longer share certificates database. Okular's backend config does not provide any way to import them except by providing a path.
Is there a way to somehow copy the certificate from ~/snap/firefox/common/.mozilla/firefox/<some-id>.default/???
to something like ~/snap/okular/common/.pki/nssdb
? Is there a better way?