Repository of browser viewport descriptions for a range of devices.
- Archived Chrome DevTools Device data, https://github.com/googlearchive/devtools-device-data
- Chrome DevTools front-end, https://github.com/ChromeDevTools/devtools-frontend/tree/master/front_end/emulated_devices
- Puppeteer Device Descriptors, https://github.com/GoogleChrome/puppeteer/blob/master/DeviceDescriptors.js
TBD.