<!DOCTYPE html>
<body>
<iframe
  src="sandboxed-features-inner.sub.html?key={{GET[key]}}&test_func={{GET[test_func]}}"
  sandbox="allow-forms
           allow-modals
           allow-orientation-lock
           allow-pointer-lock
           allow-popups
           allow-popups-to-escape-sandbox
           allow-presentation
           allow-same-origin
           allow-scripts
           allow-top-navigation
           allow-top-navigation-by-user-activation
           allow-downloads">
</iframe>

</body>