the one I listed is what's in ring-defaults by default, and you'd need to change that

or at least I did in my case

and I haven't tried frame-ancestors, for my app it's being consumed on the intranet from ie11, so I haven't tested against other browsers

Why are these lines in the home.html template, but the corresponding files are not in the assets directory?:

{% style "/assets/bootstrap/css/bootstrap.min.css" %} {% style "/assets/font-awesome/css/font-awesome.min.css" %}

because those are pulled from http://webjars.org dependencies using the ring-webjars middleware https://github.com/weavejester/ring-webjars