title: window.close() is not working in FF
body: <p>We are using <code>window.close()</code> to close the current browser tab. It works for IE, Chrome, Safari, but not for FF. </p>
  
  <p>We tried lot of solutions provided on Internet, but it seems they are not working.</p>
  
  <pre><code>window.open('','_parent','');
  window.close();
  </code></pre>