<!DOCTYPE html>
<html>
  <head>
    <title>Test for window.open() when browser is in fullscreen</title>
  </head>
  <body>
    <script>
      window.addEventListener("load", function onLoad() {
        window.removeEventListener("load", onLoad, true);

        document.getElementById("test").addEventListener("click", onClick, true);
      }, true);

      function onClick(aEvent) {
        aEvent.preventDefault();

        var dataStr = aEvent.target.getAttribute("data-test-param");
        var data = JSON.parse(dataStr);
        window.open(data.uri, data.title, data.option);
      }
    </script>
    <a id="test" href="" data-test-param="">Test</a>
  </body>
</html>