Ember app blank page on Firefox OS

I was following this guide on MDN for developing a Firefox OS App using Ember. It runs without problems in the browser but when I try to install it on Firefox OS using the Firefox WebIDE I just get a blank page.

The console output shows no errors but every time I try to install it on Firefox OS the ember console displays Content Security Policy violation: {}

I have tried it on my Geeksphone Revolution running Firefox OS 2.0 and the Firefox OS simulator for 1.4 and 2.0.

System info:

• OS: OS X 10.10.3
• Ember version: 0.2.6
• Node version: 0.12.0