"Priv3 does not block third-party interactions completely. Instead, it
selectively suppresses the inclusion of third-party web '''cookies'''"
Sounds very weak as cookies are the least part of the problem. They're highly
visible to the end user and easy to remove or block. I personally use a short
whitelist for cookies and block everything else. I currently have 33 cookies,
when did you last time check how many do you have?
A much bigger threat are e.g. various [http://en.wikipedia.org/wiki/Web_bugs
web bugs].
