HTTP header to detect a preload request by Google Chrome

Question

Google Chrome 17 introduced a new feature which preloads a webpage to improve rendering speed upon actually making the request (hitting enter in the omnibar).

Two qu

Answer 1

Chrome stopped sending X-Purpose header in 2011 and they stated that they won't fix it there: https://code.google.com/p/chromium/issues/detail?id=86175.

They re-introduced sending Purpose:prefetch headers with all nostate-prefetch requests back in 2018 as stated by the last comment on this issue. https://bugs.chromium.org/p/chromium/issues/detail?id=86175#c65