BBC micro:Bit plugin; Follow 'from current position'; Bug fixes.
Browsers provide Web Bluetooth, Web USB and Web Serial APIs, providing a few options for direct communication with a device. Providing you can get a device to connect, and find documentation on the protocol (e.g. how to send and receive messages to perform various functions), then it should already be usable (possibly involving JS coding though). The new 'BBC micro:bit raw communication' example shows how this can be done - it uses the Bluetooth and Binary Data objects to communicate with a micro:bit device directly. All the BBC micro:bit plugin does is wrap that in a nicer interface.