html,
body {
  overflow: hidden;
}

iframe.get-a-better-browser {
  width: 100%;
  height: 768px;
  display: block !important;
  padding: 0;
  margin: 0;
  overflow: hidden;
  border: none;
  z-index: 2147483647;
  position: relative;
  background: #fff;
}