Dragging a URL from a cross-origin iframe that was removed during the drag could have led to user confusion and website spoofing attacks. This vulnerability affects Firefox < 111, Firefox ESR < 102.9, and Thunderbird < 102.9.
https://www.mozilla.org/security/advisories/mfsa2023-11/
https://www.mozilla.org/security/advisories/mfsa2023-10/