Thanks for filing! This accesses document.popupNode during the menuitem command event: https://searchfox.org/mozilla-central/rev/bb37e6fe8bbe383a57a4ad21a201e26416613ca1/browser/components/customizableui/content/panelUI.inc.xhtml#58
Bug 1701085 Comment 1 Edit History
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Thanks for filing! This accesses document.popupNode during the menuitem command event: https://searchfox.org/mozilla-central/rev/bb37e6fe8bbe383a57a4ad21a201e26416613ca1/browser/components/customizableui/content/panelUI.inc.xhtml#58 / https://searchfox.org/mozilla-central/rev/bb37e6fe8bbe383a57a4ad21a201e26416613ca1/browser/base/content/browser.xhtml#455