SUMMARY Provide support for XDG Extended Attribute spec. STEPS TO REPRODUCE Download a webpage on xattr-supported file system. OBSERVED RESULT user.xdg.origin and user.xdg.referrer extended attributes are not set. EXPECTED RESULT Set user.xdg.origin and user.xdg.referrer as per Freedesktop standard: https://www.freedesktop.org/wiki/CommonExtendedAttributes/