title: how do I release the camera and microphone after a WebRTC call?
body: <p>After I end a WebRTC call, nothing I seem to do removes the red icon on the browser tab that says the camera or microphone are in use.</p>
  <p>I iterate the tracks from <code>videoElement.srcObject.getTracks()</code> and call <code>track.stop()</code> on each one. I then delete the videoElement from the DOM, but still I have the red icon.</p>