Interestingly, the bug for this feature is already 17 years old (https://bugzill...

		silverwind 33 days ago \| parent \| context \| favorite \| on: It is ok to say "CSS variables" instead of "custom... Interestingly, the bug for this feature is already 17 years old (https://bugzilla.mozilla.org/show_bug.cgi?id=435426).