The CSS Generated Content Module Level 3 spec introduces the notion of `content: none` on elements, see https://drafts.csswg.org/css-content/#valdef-content-none: > On elements, this inhibits the children of the element from being rendered as children of this element, as if the element was empty. We should implement this behavior which Firefox 91 and up support behind a flag.
<rdar://problem/85502418>