https://searchfox.org/firefox-main/rev/e28b34ab33dbf49364999070168cbb7e11e8e5bd/dom/base/nsINode.cpp#4020 is a bit overkill if we're dealing with documents from the same global
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https://searchfox.org/firefox-main/rev/e28b34ab33dbf49364999070168cbb7e11e8e5bd/dom/base/nsINode.cpp#4020 is a bit overkill if we're dealing with documents from the same global. This shows up in ES5