[1] .onion - Wikipedia, the free encyclopedia ( ( 版)) http://en.wikipedia.org/wiki/.onion
[2] RFC 7686 - The ".onion" Special-Use Domain Name ( 版) https://tools.ietf.org/html/rfc7686
[3] IETF では >>2 で提案標準となっていますが、 IANA の TLD の一覧には現時点では掲載されていないようです。
[5] Special-Use Domain Names ( 版) http://www.iana.org/assignments/special-use-domain-names/special-use-domain-names.xhtml
[6] Standardize .onion DNS lookup blocking? · Issue #248 · whatwg/fetch ( 版) https://github.com/whatwg/fetch/issues/248
[8] Nima Fatemiさんのツイート: "Firefox has introduced a new preference that blocks onion addresses on DNS level to prevent accidental leak. ⚙👌 https://t.co/islL3Y4ksd" () https://twitter.com/mrphs/status/708548201800982528
[9] 1228457 – Implement RFC 7686 (fail dns for .onion) () https://bugzilla.mozilla.org/show_bug.cgi?id=1228457
[10] 1250696 – .onion names contain their own validator, we should use that () https://bugzilla.mozilla.org/show_bug.cgi?id=1250696
[11] 1129618 – please add .onion to public suffix list () https://bugzilla.mozilla.org/show_bug.cgi?id=1129618
[12] [cabfpub] Ballot .onion ballot () https://cabforum.org/pipermail/public/2015-February/004922.html
[13] Add onion (#386) (sleevi著, ) https://github.com/publicsuffix/list/commit/45a2bf8ef3e22000fbe4bfa5f9252db41d777001
[14] BraveのTorモード、.onion URLに対して通常のDNSクエリを実行するバグ | スラド セキュリティ () https://security.srad.jp/story/21/02/23/041248/