WebHID by Kazoku

Firefox does not support the WebHID API out of the box, so this addon fills the gap. Install it plus a small background daemon, and WebHID websites work as if Firefox supported them natively. Configure your custom keyboard in a web-based configurator (VIA, Vial, and similar), sign transactions with your hardware wallet from a web app, control your USB DAC from its browser interface, or use any other HID device, all without leaving Firefox.

Requires a companion daemon to talk to your hardware. It is a small, open-source background service (Linux, macOS, and Windows supported). Download and setup instructions: https://github.com/K4zoku/FF-WebHID

Features

• WebHID for Firefox: websites that already support WebHID work without changes.
• Fast and smooth: built for demanding devices that send thousands of updates per second, without slowing down the page you are using.
• Cross-platform: works on Linux, macOS, and Windows.
• Self-healing: if the daemon restarts or a connection drops, everything reconnects automatically.
• Hot-plug: plug devices in or unplug them any time; no page reload needed.
• Per-site control: set up each website the way you want and change it any time, without reloading the page.
• Device chooser your way: pick devices from a clean overlay, a popup in the address bar, or a separate window.
• Private and secure: websites can only reach devices you explicitly choose, security keys and the system mouse and keyboard are always blocked, and all data stays on your machine.

Installation

1. Install the addon from this page
2. Install the system daemon (see the installation guide)
3. Visit any WebHID-enabled website and start using your devices

Privacy

• All device communication stays on 127.0.0.1 (localhost)
• No data is sent to any external server
• Connections to the daemon stay on your machine and are token-authenticated
• Device permissions are stored locally per site origin