I’ve just got certificates and imported those on my FritzBox router. Serving the fritzbox admin ui over SSL works fine on Safari and Chrome but Firefox 47 complains: SEC_ERROR_UNKNOWN_ISSUER
Firefox claims (translated): the certificate is not verified since the issues is unknown.
What I’ve uploaded to the fritzbox is the concatenated cert.pem and privkey.com
DNS name available per pm.
Note: Firefox does not show a hierarchy of this certificate. Maybe the concatenation should include others files, too, before uploading to the fritzbox?