BBC News writes that researchers from the Intersciplinary Centre for Law en ICT (ICRI) of the Leuven University published a paper “about Facebook’s use of plug-ins to track people. A plug-in, such as the follow button that Facebook provides to direct users to a company’s Facebook page from its own website, can also act as a tracker, following the sites a person visits. However, many online companies use plug-ins, as well as cookies, for tracking internet use. Facebook was also criticised for not offering opt-outs on location data collations. The authors said this may put Facebook in breach of EU laws that demand explicit consent from individuals for website tracking and the use of cookies.”

A Facebook spokesperson reacted: “”This report contains factual inaccuracies”.