A nice summary to pass on to friends who aren't aware of these issues.<p>Also, I was unfamiliar with this Firefox extension:<p>RequestPolicy 0.5.12<p><a href="https://addons.mozilla.org/en-US/firefox/addon/9727" rel="nofollow">https://addons.mozilla.org/en-US/firefox/addon/9727</a><p>Be in control of which cross-site requests are allowed. Improve the privacy of your browsing by not letting other sites know your browsing habits. Secure yourself from Cross-Site Request Forgery (CSRF) and other attacks.