In May, Khanna released Marauder’s Map, a Chrome extension that used location data to show you exactly where your friends were. It was downloaded 85,000 times in three days, before Facebook asked him to disable it.
Facebook also disabled location sharing from desktops and subsequently updated Messenger for mobile, giving users the option to control their GPS data. Prior to that, the app had been sharing users’ locations by default since it launched in 2011.
