awawausb — WebUSB Extension for Firefox

Skill by ara.so — Daily 2026 Skills collection.

awawausb adds WebUSB (navigator.usb) to Firefox via a two-part system: a browser extension (.xpi) and a native stub binary (compiled Rust) that communicates over native messaging.

Architecture

Web Page (navigator.usb)
    ↕  WebExtension API
Firefox Extension (extension/)
    ↕  Native Messaging (stdio, JSON-framed)
Native Stub Binary (native-stub/ — Rust)
    ↕  OS USB APIs (WinUSB / libusb / IOKit)
USB Device

Installation (End Users)