404. That’s an error.

The requested URL /add?feedurl=http://dafahao.com/tor-firefox.html&title=tor-browser:%E9%9B%86%E6%88%90tor%E7%9A%84Firefox%E6%B5%8F%E8%A7%88%E5%99%A8 was not found on this server. That’s all we know.