Aha! https://s.marktplaats.com/ indeed gives different results on Qualys:
"This server's certificate chain is incomplete. Grade capped to B." https://www.ssllabs.com/ssltest/analyze.html?d=s.marktplaats.com At the moment I think this is a misconfigured server at marktplaats.com. Probably we're not going to perform an update to include this certificate unless Mozilla decides to include it in their certificate bundle. Thanks -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1795242 Title: Digicert certificate is not included To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ca-certificates/+bug/1795242/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs