2014-06-20, 08:33 PM
MFC does not add any widget that might inject a cookie (which can eventually be used by Facebook to obtain just your forum's URL), so it's perfectly safe to use.
Also, note that Facebook can't set a cookie on a forum member's browser as long as he doesn't visit Facebook. A cookie is domain-dependent and can be accessed just by the domain that set it, so it can't "gather" information from another domain. It can be set by an "image beacon" as he said but it is used to track the user's interests (it can "send" to Facebook just the URL it has been set), and nothing else.
Also, note that Facebook can't set a cookie on a forum member's browser as long as he doesn't visit Facebook. A cookie is domain-dependent and can be accessed just by the domain that set it, so it can't "gather" information from another domain. It can be set by an "image beacon" as he said but it is used to track the user's interests (it can "send" to Facebook just the URL it has been set), and nothing else.