but instead, run ethernet over USB.
Can you find ANY device that does this?
Access USB Devices on the WebHow to WebUSB-enable a compatible Arduino boardThe following text, comes from the first link:Let's see what you could expect with the WebUSB API: Buy a USB device. Plug it into your computer. A notification appears right away, with the right website to go to for this device. Simply click on it. Website is there and ready to use! Click to connect and a USB device chooser shows up in Chrome, where you can pick your device.