title: Get JSON in a Chrome extension
body: <p>Small problem with my chrome extension.</p>
  
  <p>I just wanted to get a JSON array from another server. But manifest 2 doesn't allow me to do it. I tried specify <code>content_security_policy</code>, but the JSON array is stored on a server without SSL cert.</p>
  
  <p>So, what should I do without using manifest 1?</p>