That role is actually held by webkit nowadays, with webdev using only -webkit-* css properties (without including the non-prefixed one) and webkit not dropping

That role is actually held by webkit nowadays, with webdev using only -webkit-* css properties (without including the non-prefixed one) and webkit not dropping their prefix once something has been standardized. See https://wiki.mozilla.org/Platform/Layout/CSS_Compatibility#questions_and_methodology https://wiki.mozilla.org/Platform/Layout/CSS_Compatibility#q... for instance