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Test Info: Warnings

<html class="reftest-wait">
<script>
document.addEventListener("DOMContentLoaded", () => {
window.setTimeout(() => {
SpecialPowers.wrap(window).printPreview()?.close()
SpecialPowers.wrap(window).printPreview()?.close()
document.documentElement.className = "";
}, 0)
})
</script>
<iframe src='data:text/html,foo'></iframe>
</html>