Trezor Bridge: Secure & Smooth Crypto Access

Trezor Bridge runs locally on your computer, enabling safe and reliable communication between your hardware wallet and Web3 applications. This guide details installation, security, developer integration, privacy practices, troubleshooting, and advanced usage in a colourful, user-friendly format.

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.

Local Service

Runs safely on your machine

Secure USB

Direct, encrypted communication

Web3 Ready

Compatible with modern dApps

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

  1. Download Bridge from the official Trezor website and verify the source.
  2. Run the installer; it sets up a local service for app connections.
  3. 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.