With so little information, it's impossible for anyone to say. You haven't specified any example URL's or the actual error code which explains the reason for them being untrusted.
In any case, this shouldn't be reported against Firefox. More often than not, these issues are either an issue with the server configuration or a local network issue ** Package changed: firefox (Ubuntu) => ubuntu ** Tags added: needs-reassignment -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1194589 Title: Firefox gave an Untrusted Site Warning for two separate Community Ubuntu Documentation Sites. Status in Ubuntu: New Bug description: On two separate occasions for different users, Firefox gave an Untrusted Site Warning for Community Ubuntu Documentation Sites. Has the relevent certificate documentation expired ? Unable to reproduce the problem as Firefox has now added exceptions in both cases. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1194589/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
