Add and update MHTML headers to support sharing of MHTML pages

To support sharing of MHTML pages, a new header Snapshot-Content-Location will be added. The existing Subject header will be updated to support encoding of non-printable ASCII characters.


Status in Chromium


Enabled by default (tracking bug) in:

  • Chrome for desktop release 66
  • Chrome for Android release 66
  • Chrome for iOS release 66

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.

  • No public signals
  • No public signals
  • No public signals
  • No signals


Last updated on 2019-02-27