But "This site uses HTTP Strict Transport Security (HSTS) to specify that Iceweasel only connect to it securely. As a result, it is not possible to add an exception for this certificate." So it's difficult to follow the link from https://sn.pztrn.name/url/9408 to https://wiki.loadaverage.org/news/changing_ssl_certificate_your_interaction_may_be_needed http://h45h.com/Qc2iVNCuxkgMuvNATm1WVC8s7JsFacXedve2AlMLzd0=