Certificate authority (CA) in Ubuntu 21.10 is installed but it does not work

Question

I've installed certificates before within Windows and Ubuntu [server] and it works normally, but today I tried to install certificates on Ubuntu Desktop 21.10 over RDP + AD user, and it does not work as expected:

• I installed the CA certificates via:

  sudo mv euro-ca.crt euro-sub-ca.crt /usr/share/ca-certificates/
  sudo update-ca-certificates 
  

• I checked the certificate and it gives me this output, but it does not work in Chrome/Firefox; I cleared cache, cookies, rebooted Ubuntu, and logged in as another user [local admin]:

  openssl s_client -connect firewall.euro.adroot:443 -CApath /etc/ssl/certs
  CONNECTED(00000003)
    depth=2 CN = euro-ca, C = FR, ST = *************  verify return:1
    depth=1 CN = euro-sub-ca, C = FR, *************  verify return:1
    depth=0 CN = firewall.euro.adroot, *************  verify return:1
  
  
  Post-Handshake New Session Ticket arrived:
    SSL-Session:
        Protocol  : TLSv1.3
        Cipher    : TLS_AES_256_GCM_SHA384
        Session-ID: ******************************
        Session-ID-ctx: 
        Resumption PSK: *************************************
        PSK identity: None
        PSK identity hint: None
        SRP username: None
        TLS session ticket lifetime hint: 600 (seconds)
        TLS session ticket:
        0000 - 63 af b7 ***********************23    c.. ..I***..#.
        0010 - 37 cf *******************8 42 4f    7..#*******..BO.
    Start Time: 1640439082
    Timeout   : 7200 (sec)
    Verify return code: 0 (ok)
    Extended master secret: no
    Max Early Data: 0