Facebook Blocker is a browser extension that can stop Facebook social plug-ins such as ‘Like’ buttons and ‘Recommended’ lists running on websites and blogs. Most importantly, it can also stop any Facebook scripts from tracking your browsing history.
Facebook Blocker extension now available for Firefox, Google Chrome, Safari and Opera browsers and is able to stop Facebook social plugins—including those within iFrames—from running on sites other than Facebook itself.
However, it will not stop Facebook Connect. If your site using Facebook Connect for sign in purposes, or that use Facebook as a conduit for other functionality will continue to work.
You can Install Facebook Blocker from here