title: I'm developing my web app locally (file://) and icons from CDN don't show up
body: <p>Im not sure whats happening, the font-aweseome file was loaded successfully as the developer console shows, but icons are not rendering at all. I only see a rectangle.</p>
  
  <p>This is how I load font-awesome:</p>
  
  <pre><code>&lt;link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"&gt;
  </code></pre>
  
  <p>Call:</p>
  
  <pre><code>&lt;i class="fas fa-plus fa-5x"&gt;&lt;/i&gt;
  </code></pre>
  
  <p>Result:</p>
  
  <p><a href="https://i.stack.imgur.com/qVqk0.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qVqk0.png" alt="enter image description here"></a></p>