ucabled: using Passkeys stored on your phone on a Linux desktop.
Firefox on Linux has no cross-device passkey flow. So ucabled registers a virtual FIDO2 HID device via /dev/uhid and relays CTAP to the phone over caBLE v2.
Scan, Face ID, done. No extension, no keys on the machine.
https://github.com/fuzy112/ucabled
https://fuzy112.github.io/ucabled