[wux]

Actually, according to comments on one of the Bugzilla reports about this issue (#1424977), the original bug implementing the feature is:

https://bugzilla.mozilla.org/show_bug.cgi?id=1423003

As you'll see, this bug is marked as private (at least as of writing this comment). So, as a matter of fact, it does not appear that even the most diligent user had the option of reviewing what's going on. So far, it has not even been disclosed who among the Firefox peers signed off on this change; that information appears to be private as well.

[acqq]

Correct. Even when logged in, the normal user gets:

"Access Denied You are not authorized to access bug 1423003."