chromium/third_party/blink/web_tests/external/wpt/html/browsers/windows/targeting-multiple-cross-origin-manual.sub.html

<meta charset=utf-8>
<p>Follow this link to open a new browsing context in a separate origin. Follow the instructions
in that new window, and then come back to this window.
<a target=first href="{{location[scheme]}}://{{domains[天気の良い日]}}:{{location[port]}}/html/browsers/windows/resources/target-cross-origin.sub.html">link</a>.

<p>Once you come back to this page, follow this link.
<a target=second href="resources/echo-window-name.html">link</a>.

<p>After clicking that link, you should have three additional windows open.