> We realized this is not limited to U2F / FIDO and developed a generic proxy that allows to forward any USB device exposed to WebUSB to a remote system.
~sigh~
It's really depressing to learn that reality was much worst than any of my "this is going to end badly" predictions[1]. I originally thought[2] the problems would start on the hardware side with devices that were never designed for security. Forwarding everything with a proxy is shockingly worse.