In a recent interview, Stallman has listed Facebook as a form of "mass surveillance". Thanks to the ubiquitous "like" button, the company can keep track of site visits all around the web.
A week of Windows 10, holograms and Exploding Kittens on Mars
Office 2016 launching this year, touch apps coming soon
Microsoft reveals the next version of Windows 10
Introducing Windows 10 for phones
Hands on with HoloLens
Download: Windows 10 build 9926