What is Trezor Bridge?
Bridge is a local service that connects your Trezor hardware wallet to web or desktop applications securely over USB/WebUSB. It ensures private keys remain on the device while providing a smooth user experience and replacing legacy plugins.
Why Use Bridge?
- Browser restrictions: Handles USB communication safely for modern browsers.
- Cross-platform: Works seamlessly on Windows, macOS, and Linux.
- Simple setup: Avoids extensions and complex driver configurations.
Security Model
Bridge never accesses your private keys. All signing occurs on the Trezor device. Key security features include:
- Localhost-only communication
- Origin verification on device
- Minimal privileges — only USB handling
Installation & Setup
- Download Bridge from the official Trezor website and verify the source.
- Run the installer; it sets up a local service for app connections.
- Open a browser or Trezor Suite and approve the device connection when prompted.
Linux users may need to configure udev rules for USB access — follow the official guidance.
Developer Integration
Bridge works with Trezor Connect or HTTP endpoints for seamless Web3 integration:
- Include
trezor-connect
in your Web3 project. - Prompt users to connect devices; confirmations appear on the Trezor screen.
- Handle errors and responses carefully to maintain security.
// Example usage TrezorConnect.getFeatures().then(features => console.log(features)) .catch(err => console.error('Error', err));
Privacy & Best Practices
- Never enter recovery seeds — Bridge doesn't need them.
- Use desktop Suite or air-gapped setups for maximum privacy.
- Always confirm the web app origin on the device before signing transactions.
- Keep both Bridge and firmware updated; delay updates on cold-storage devices if necessary.
Advanced Usage
Automation and CI/CD usage is possible but should be restricted. Never store recovery seeds in scripts; all signing must remain human-approved and auditable.
Troubleshooting
- Ensure the Bridge service is running; start manually if necessary.
- Use USB cables that support data transfer.
- Resolve conflicting drivers or configure udev rules on Linux.
- Verify browser permissions and device unlock status.
FAQ
- Q: Is Bridge required? A: Yes, for most browser-based Web3 apps.
- Q: Can Bridge sign transactions? A: No, signing happens only on the device.
- Q: Is it safe on shared computers? A: Prefer dedicated machines for sensitive keys.