Firefox dropped support for P3P in Firefox 3 because "p3p isn't an effective way...

		robertc on Feb 21, 2012 \| parent \| context \| favorite \| on: Facebook and many other sites also bypass Internet... Firefox dropped support for P3P in Firefox 3 because "p3p isn't an effective way to establish trust with a site. it's a one-way system; anyone can say they're the good guy." See item b: https://bugzilla.mozilla.org/show_bug.cgi?id=417800#c11