> the browser should be cooperating and working on the user’s behalf to limit tracking

I hear Microsoft is working on a new browser that gives the user more control over cookies:

1. It shows a confirmation dialog before setting a cookie

2. The site can declare a machine readable policy (P3P) specifying what the cookie will be used for, which the browser uses to automatically decide if the cookie should be permitted.

They plan to call it "Internet Explorer" or something.