Noticed that this page worked on Chrome, but not on FF.
On FF (57.0.2) Windows 7, the message is as below:
Error 1010 Ray ID: 3cc3b2b85d0b9300 • 2017-12-12 21:15:17 UTC Access denied What happened?
The owner of this website (fly-io.ghost.io) has banned your access based on your browser's signature (3cc3b2b85d0b9300-ua48).
Not sure if the author or website owner had a beef with FF.