Hoping to retrieve a corner of digital privacy? Block trackers that link your browsing history to advertisements through DoNotTrackMe , a free app that installs on both PCs and Macs, preventing companies from collecting data based on your surfing habits. The app works on most browsers from Safari to IE, Chrome to Firefox. Users can even check how many trackers are being thwarted daily. (Think in the hundreds. Yes, really.) It’s a new year — time to clean the slate, and your browser.