This is a server bug. The websites certificate is signed by a Geotrust intermediate, and that certificate must be provided by the server too. Adding the missing intermediate manually also works, but in any case, this isn't a Firefox bug.
See https://knowledge.geotrust.com/support/knowledge- base/index?page=content&id=AR1422 This page can verify the issuer chain for you and point you to the missing intermediate - https://knowledge.geotrust.com/support/knowledge- base/index?page=content&actp=CROSSLINK&id=SO9557 ** Changed in: firefox (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to the bug report. https://bugs.launchpad.net/bugs/856401 Title: https://www.zipvitsport.co.uk/ shows untrusted site certificate To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/856401/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
