> which are more powerful and is out-of-spec These are in the specification here: https://drafts.fxtf.org/filter-effects-1/#typedef-filter-url https://drafts.f

> which are more powerful and is out-of-spec These are in the specification here: https://drafts.fxtf.org/filter-effects-1/#typedef-filter-url https://drafts.fxtf.org/filter-effects-1/#typedef-filter-url And used by backdrop-filter here: https://drafts.fxtf.org/filter-effects-2/#BackdropFilterProperty https://drafts.fxtf.org/filter-effects-2/#BackdropFilterProp...