Apple’s iOS 13 comes with some major changes to privacy and security, but it’s also highlighted the data collection practices of firms such as Facebook and Google. One of the first things you might notice when using Apple’s iOS 13 is a notification when opening an app such as Facebook asking for Bluetooth permission. Sure, some apps need access to Bluetooth to work properly. Take, for example the Fitbit smartwatch. But others use Bluetooth to stealthily track people’s location using beacons dotted around in cities and shopping areas. The Verge’s Chris Welch wrote a useful article including more detail on...