==== Installing Fennosys root CA to Firefox (Linux workstation) ====

  * Download and save the certificate locally to your computer
    * https://manuals.c1.fi/certs/Fennosys-PN-CA.crt

  * Open shell

  * cd to your firefox profile folder (~/.mozilla/firefox/????????.default*)

  * Import CA with certutil cli tool

    $ certutil -d ./  -A -i /usr/local/share/ca-certificates/Fennosys-PN-CA.crt -n "FPN CA" -t "TCu,,"

  * The above will require firefox master password (if one is set! - Same which is used for protecting "Logins and Passwords"):

    Enter Password or Pin for "NSS Certificate DB": [enter your ff master passwd]

  * Check that our cert was installed OK

    $ certutil -d ./ -L -n "FPN CA" | head


  Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            00:c4:ea:e8:f2:05:6c:90:0f
        Signature Algorithm: PKCS #1 SHA-512 With RSA Encryption
        Issuer: "E=-,CN=FPN CA,OU=Fennosys private network,O=Fennosys,L=-,ST=
            -,C=FI"
        Validity:
            Not Before: Tue Aug 14 15:03:54 2018

  * All done! =)