I have these messages when I load cockpit in firefox:
http://imgur.com/FUmIlm9
http://imgur.com/yJti27W
$ rpm -qa|grep cockpit
cockpit-125-1.fc25.x86_64
cockpit-networkmanager-125-1.fc25.noarch
cockpit-storaged-125-1.fc25.noarch
cockpit-shell-125-1.fc25.noarch
cockpit-sosreport-125-1.fc25.noarch
cockpit-bridge-125-1.fc25.x86_64
cockpit-doc-125-1.fc25.x86_64
cockpit-ws-125-1.fc25.x86_64
cockpit-docker-125-1.fc25.x86_64