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diff --git a/dom/base/crashtests/1712198.html b/dom/base/crashtests/1712198.html
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+<script>
+document.addEventListener('DOMContentLoaded', () => {
+ let a = document.documentElement
+ SpecialPowers.wrap(self).printPreview().document.adoptNode(a)
+ let b = document.createElementNS('http://www.w3.org/1999/xhtml', 'optgroup')
+ a.appendChild(b)
+ b.focus({ })
+})
+</script>