Thought I might start a thread to track WebUSB developments.
Chrome v.61+ is now shipping with WebUSB default enabled. This is a new standard that allows web pages to interface directly to USB devices.
I found a WebUSB Support Checker static site zip. I installed it on my website here. WebUSB pages apparently have to be delivered over SSL to work.
WebUSB detects and connects to BlinkStick and my mobile devices on Windows 10.
However on Linux (Ubuntu), it marks “General Support” with an “X” when I attempt to connect to BlinkStick.
The error in the Chrome F12 console is:
Uncaught (in promise) DOMException: Access denied.
serial.js:26 This error is probably intended, can't claim all the interfaces.
Error: DOMException: Unable to claim interface. (BlinkStick Flex)
Suspect the UDEV rule for BlinkStick on Linux needs to be tweaked for WebUSB. I shall post a working rule here if that is the solution.