[FrontAid]

> Similar to the Do Not Track header, a Accept Cookies header?

Do not track can do that, it has three possible values.

    0: The user prefers to allow tracking on the target site.
    1: The user prefers not to be tracked on the target site.
    null: The user has not specified a preference about tracking.

Source: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/DN...

The problem is that DNT is mostly ignored, and also deprecated by now.