Facebook makes its money by figuring out what you're doing on and off of the
website. The company tracks almost everything that its users do in an effort to
understand them.
If you'd rather not be turned into a statistic for Facebook to sell
on the open
market, a browser extension can stop all of Facebook's
tracking attempts.
Facebook Disconnect is a browser extension that's available for both Firefox and
Chrome. Install it in your browser and it blocks Facebook from getting
information about what websites you're visiting.