Microsoft blamed Google for bypassing the privacy settings of Internet Explorer, but it turns out that Facebook is also doing the same. Facebook and thousands of other websites are doing the same thing by writing incorrectly formatted compact policies (CPs) for the Platform for Privacy Preferences Project (P3P). IE is the only major browser to support P3P.
Section 3.2 of the P3P policies define the syntax and semantics. The W3C designed P3P to give users more control of their personal information when browsing. P3P has been part of IE since IE 6 when it was released in August 2001.