pageflow.features.add('hashchange support', function() {
  var iOS = parseFloat(
  ('' + (/CPU.*OS ([0-9_]{1,5})|(CPU like).*AppleWebKit.*Mobile/i.exec(navigator.userAgent) || [0,''])[1])
  .replace('undefined', '3_2').replace('_', '.').replace('_', '')
) || false;

  return !(iOS >=8);
});