https://warper.wmflabs.org/ loads <link href='[http://fonts.googleapis.com/css?family=Lato:400,700|Sorts+Mill+Goudy|Vidaloka](view-source:http://fonts.googleapis.com/css?family=Lato:400,700|Sorts+Mill+Goudy|Vidaloka)' rel='stylesheet' type='text/css'>
while it should preferably use https://fontcdn.toolforge.org/ instead.
See also https://phabricator.wikimedia.org/T133919