Serial API - Allows websites to write and read data from serial interfaces, used by devices such as microcontrollers, 3D printers, and othes.WebHID - Allows websites to retrieve information about locally connected Human Interface Device (HID) devices.Proximity Sensor - Allows websites to retrieve data about the distance between a device and an object, as measured by a proximity sensor.HDCP Policy Check extension for EME - Allows websites to check for HDCP policies, used in media streaming/playback.Ambient Light Sensor - Lets websites get the current light level or illuminance of the ambient light around the hosting device via the device's native sensors.Web Bluetooth Scanning - Allows websites to scan for nearby Bluetooth LE devices.Battery Status API - Allows websites to receive information about the battery status of the hosting device.Network Information API - Provides information about the connection a device is using to communicate with the network and provides a means for scripts to be notified if the connection type changes.Device Memory API - Allows websites to receive the approximate amount of device memory in gigabytes.Web NFC API - Allows websites to communicate with NFC tags through a device's NFC reader.Magnetometer API - Allows websites to access data about the local magnetic field around a user, as detected by the device's primary magnetometer sensor.Web MIDI API - Allows websites to enumerate, manipulate and access MIDI devices.Web Bluetooth - Allows websites to connect to nearby Bluetooth LE devices.Technologies that Apple declined to include in Safari because of user fingerprinting concerns include: Apple said this week that it declined to implement 16 new web technologies (Web APIs) in Safari because they posed a threat to user privacy by opening new avenues for user fingerprinting.