Examples on modestmaps.com/examples don't load because of CSP

Tried to look at the [examples]http://modestmaps.com/examples/), but got the following error (in Firefox 44.0.2 Ubuntu 64-bit):

Blocked by Content Security Policy

This page has a content security policy that prevents it from being loaded in this way.

Firefox prevented this page from loading in this way because the page has a content security policy that disallows it.

[dpankros]

Same on Chrome 57:

Refused to display 'http://bl.ocks.org/tristen/raw/2689194/' in a frame because an ancestor violates the following Content Security Policy directive: "frame-ancestors 'self' *.ocks.org".