rv = mChannel->PushStreamConverter("text/ftp-dir",
APPLICATION_HTTP_INDEX_FORMAT);
[2] No longer render resources requested via FTP (mikewest著, ) https://github.com/whatwg/fetch/commit/c6b3a750f811cb4f628def0313ac317d9dcec88a
[3] Treat resources requested via FTP as binary data. by mikewest · Pull Request #839 · whatwg/fetch () https://github.com/whatwg/fetch/pull/839