This is an archived snapshot of W3C's public bugzilla bug tracker, decommissioned in April 2019. Please see the home page for more details.
http://dev.w3.org/csswg/cssom/#fetching-css-style-sheets As far as I understand it a foreign-origin resource should show up in CSSOM when it is provided with CORS headers. Apparently you also need to set the crossorigin attribute on the link element for this to work. If this is correct, a note should point this out so readers can make this connection more easily.