Facebook users beware: The company has officially declared that it will be tracking your online consumption and behaviour on Facebook, and off Facebook too. Like Google, Facebook wants to leverage its understanding of your user behaviour to serve you more targeted ads.
Facebook has been using your likes and posts on Facebook to target ads to you already. Now, though, Facebook will track you across any website you visit, as long as the site has a ‘like’ button, a Facebook login, or any Facebook code. And Facebook will track your reading habits, even if you don’t login via Facebook or click on ‘like’ button on the site.
You may not be aware of this, but Facebook has managed this via an automatic-opt-in feature — albeit one which you can opt out of. However, activists and analysts point out that companies like Facebook, Google etc should only be allowed to use your data by turning it on through your explicit permission (manual opt-in instead of automatic opt-in) — and not by having to turn it off through an opt-out… see more
source: times of india