title: InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable
body: <p>The following works in Chrome but not Firefox:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>var myVideo = document.getElementById('myVideo')
  myVideo.currentTime = 570</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;video id="myVideo" controls&gt;
  &lt;source src="myVideo.mp4" type="video/mp4"&gt;
  &lt;/video&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>In Firefox it says </p>
  
  <blockquote>
    <p>InvalidStateError: An attempt was made to use an object that is not,
    or is no longer, usable</p>
  </blockquote>
  
  <p>for line 2.</p>