Wow. Facebook had managed to fail on a thing absent in much less popular sites since the day one. A CDN absolutely mustn't allow a user to browse to a file wit

Wow. Facebook had managed to fail on a thing absent in much less popular sites since the day one. A CDN absolutely mustn't allow a user to browse to a file with a different extension than it was uploaded with. It must return 404 in this case. II think the flaw is much more severe than has been discovered.