title: window.opener.focus() doesn't work
body: <p>I can't seem to get this to work.</p>
  
  <p>In response to a click, window A opens window B (which then has focus). Then, in response to a click on B, the window calls <code>window.opener.focus()</code>, but the focus does <em>not</em> go back to A.</p>
  
  <p>I have found a strange, strange workaround for Chrome (29, possibly others).
  If I run:</p>
  
  <pre><code>window.opener.name = 'somename';
  window.open(window.opener.location.href, window.opener.name);
  window.opener.focus();
  </code></pre>
  
  <p>it does work (and doesn't reload window A). But this doesn't work for Firefox, and it is probably a fluke anyway.</p>
  
  <p>It seems very clear to me what <code>opener</code> and <code>focus</code> are <em>supposed</em> to do, but <code>window.opener.focus()</code> doesn't work. What am I missing?</p>