Dear Mozilla: I hope your browser have all the internal data flows accounted, i.e. how much of your cookie, location, keystrokes, files goes to each site should

Dear Mozilla: I hope your browser have all the internal data flows accounted, i.e. how much of your cookie, location, keystrokes, files goes to each site should be presented to a user. This can be complicated due to cross-site login credentials and whatnot, but it can be visualized nicely in a graph format. This would probably require engine-related changes and affect the performance, but definitely a direction I'd like to see in future.