Just a note: Neither Ghostery or Disconnect work in Chrome, since Chrome doesn't have any kind of ability to block requests from being made. The experimental webRequest API should help with that, but it hasn't been released yet.
also, responding to the (grand) parent, someone else mentioned that flash cookies are cross-browser. so if fb uses those you need to also make sure that the fb browser doesn't have flash installed.
The experimental webRequest API will solve that by providing a synchronous way for scripts to deny/allow connections before any requests are made, but webRequest won't be made available to non-experimental addons for a few months at the minimum.
More info: https://code.google.com/chrome/extensions/trunk/experimental...