The IESG has concluded that this work is related to IETF work done in WG httpbis , but this relationship does not prevent publishing. The IESG would like the following IESG note added to the document: ----------------------- Given the current requirements for registering HTTP preferences [RFC7420], the relationship between this document and those registry requirements is unclear. The document claims that its purpose is to specify a common understanding of how the "safe" HTTP preference operates, but this is not achieved since there is no semantic defined for "safe." The registration policy for the HTTP preferences registry is Specification Required, so an RFC is not necessary in order to simply register this preference. This mechanism was presented for publication as an IETF Proposed Standard, but was not approved for publication by the IESG. Concerns raised by the IESG remain valid. Some of these concerns are addressed or discussed in the document, but others are not, such as how the use of this preference may incentivize increased censorship and/or targeting of minors. -----------------------