<!doctype html>
<title>Test reference</title>
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<iframe width="500" height="500" srcdoc='<!doctype html><img alt="FAIL" srcset="/images/green-256x256.png 100w" style="max-width: 100%" sizes="10px">'></iframe>