This is pasted from my console:
http://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&mo…Cmediawiki.skinning.content.parsoid&skin=vector&version=20150212T164650Z&* Failed to load resource: the server responded with a status of 403 (HTTP method not allowed.)
I copied the URL and opened it in another tab, everything worked quickly and well.