domain-setter.sub.html
<!DOCTYPE html>
<meta charset="utf-8">
<title>A page that will likely be same-origin-domain but not same-origin</title>
<script>
"use strict";
document.domain = "{{host}}";
</script>
<!DOCTYPE html>
<meta charset="utf-8">
<title>A page that will likely be same-origin-domain but not same-origin</title>
<script>
"use strict";
document.domain = "{{host}}";
</script>