Coined by Bug 103208. A apparent targets are: - HTMLContentElement - HTMLShadowElement - ContentSelectorQuery - part of ComposedShadowTreeWalker
*** Bug 103654 has been marked as a duplicate of this bug. ***
Note that ComposedShadowTreeWalker is also used in FocusController and HTMLLIElement.
(In reply to comment #2) > Note that ComposedShadowTreeWalker is also used in FocusController and HTMLLIElement. Right. I did it... I should hide them behind NodeRenderingTraversal. Filed Bug 106505.
Not gonna do this.