Cloudflare and document.write

Cloudflare’s Rocket Loader is being intercepted by the new Chrome (v54) and
Firefox rules regarding document.write (more here.

Because of that, pages where Cloudflare decided to inject the rocket loader (for
example not if you visit a page with Safari) doesn’t load any scripts sourced
with data-rocketsrc.

Change the Rocket Loader mode in Cloudflare to manual or wait for a
solution.