1899279 - Fix `navigator.cookiesEnabled` to match the spec more closely

Status: NEW

(Core :: Privacy: Anti-Tracking, enhancement)

Description

[Benjamin VanderSloot [:bvandersloot]]

https://github.com/whatwg/html/issues/10256

Comment 1

[Benjamin VanderSloot [:bvandersloot]]

Attachment: Bug 1899279 - Make `navigator.cookiesEnabled` match the spec - r=#anti-tracking!

It turns out that a reasonable definition of navigator.cookiesEnabled is that
we are trying to follow the cookie spec. This should correspond to browser settings,
not the particular context we are in. If we don't make this change we risk
this being used to check partitioning state rather than something that reflexts the
complexity of the situation (where partitioned/blocked/enabled) are all options.

This aligns us with Blink and WebKit.

https://github.com/whatwg/html/issues/10256