title: How can I target both :-webkit-full-screen and :moz-full-screen at the same time?
body: <p>This works:</p>
  
  <pre><code>:-webkit-full-screen {
      ...
  }
  </code></pre>
  
  <p>And so does this:</p>
  
  <pre><code>:-moz-full-screen {
      ...
  }
  </code></pre>
  
  <p>But when I do this, the styles don't get applied in Chrome or Firefox:</p>
  
  <pre><code>:-webkit-full-screen, :-moz-full-screen {
      ...
  }
  </code></pre>
  
  <p>How do I target both?</p>