
    <!--
      FF won't focus a div with contenteditable if it's the first element on the page.
      https://jsbin.com/cawevo/edit?html,output
      Add a dummy button so Selenium can use it as the first focus target.
    -->
    <button id="start">Start</button>
    <div contenteditable="true" id="el"></div>
    <script src="/dist/focus-visible.js"></script>
  </body>
</html>
