Via new-atk agreement, nsIAccessibleHyperlink is no longer only for links, but for any embedded object in HTML text. Because anything (including a XUL or SVG element) can be embedded within HTML text, every nsAccessible could potentially by an nsIAccessibleHyperlink. The nsAccessible::QueryInterface implementation will need to check whether the parent is an nsIAccessibleHypertext before deciding whether the QI to nsIAccessibleHyperlink should succeed.