Hi,
I filed this bug a while ago,
https://bugzilla.redhat.com/show_bug.cgi?id=1252839
Seems that a small change (http -> https) in the captive portal detection
configuration file broke it.
If we want captive portal detection (I think we do), this should probably
be fixed. Otherwise, we should remove
NetworkManager-config-connectivity-fedora from our default install.
--
-Elad.