"Instant Personalization" in April 2010 to plenty of criticism, and for good reason: The feature is confusing and Facebook's online does not make it clear how participating sites use your information.

If you visit one of the sites that supports Instant personalization--Bing, TripAdvisor, Rotten Tomatoes, Pandora, Yelp and others--and you've enabled the feature, you can see which of your friends have "liked" certain movies or news stories and browse reviews they posted. Additionally, Instant Personalization uses information you made public on your profile to recommend movies or songs, for example.

The first time you visit a site that supports Facebook Instant Personalization, a notification message appears that lets you turn off the feature, if you want.

Otherwise, to enable or disable Instant Personalization, you should visit your Facebook Privacy Settings page, then choose "Edit your settings" under "Apps and Websites" at the bottom. Scroll to the bottom, click "Edit Settings" next to "Instant personalization" and uncheck the box on the next page.