Introduction
Trézór Bŕidge® ("Bridge") is a lightweight background application that allows modern browsers to securely communicate with your Trezor hardware wallet over USB (and when supported, via native system integrations). It acts as a trusted messenger: web apps request actions, Bridge forwards the request to your Trezor, and the device returns signed transactions and confirmations — keeping private keys isolated on-device.
Why Bridge matters
Browsers are sandboxed and cannot directly access USB devices in all contexts, nor should they. Bridge provides a secure, auditable layer that ensures:
- Transactions are displayed and approved on the physical device (not the browser).
- Only authorized requests reach your Trezor when you explicitly connect.
- Developers can build browser-based experiences while users retain hardware-level protections.
Install & setup
- Download: Always download Bridge from the official Trezor domain. Verify the URL and checksum if provided.
- Install: Run the installer for your OS (Windows, macOS, Linux). Accept permissions so Bridge can run as a small background service.
- Connect your Trezor: Plug your Trezor device into a USB port. If your model supports it, allow any OS-level prompts for device access.
- Open Trezor Suite: Launch Trezor Suite or a compatible web dApp — Bridge will route requests to the device automatically when you choose to connect.
- Authorize: Each connection and transaction must be verified on the Trezor screen and approved using device buttons or touch interface.
Bridge has installers for Windows, macOS, and major Linux distributions. It integrates with browsers that support native messaging or USB redirection for better compatibility. For the most consistent experience, use the latest stable versions of Chrome, Edge, or Firefox and keep Bridge up to date.
Key features
- Secure device discovery: Detects Trezor hardware and exposes it only to trusted apps.
- Message routing: Forwards signing requests to the device and returns signed payloads to the requesting app.
- Compatibility: Works with Trezor Suite and many third-party web wallets and dApps that follow Trezor’s communication protocols.
- Lightweight: Minimal system footprint — designed to run unobtrusively in the background.
Security & best practices
Bridge improves usability but security remains anchored in the device. Keep these rules in mind:
- Download Bridge only from the official Trezor website. Avoid third-party binaries.
- Never enter your recovery seed or PIN into a browser. PIN entry and confirmations happen on the device.
- Verify addresses and transaction details on the Trezor screen before approving — the device is the ultimate source of truth.
- Keep device firmware, Bridge, and Trezor Suite updated to benefit from security patches and protocol improvements.
- Use OS-level security features (firewall, verified installers) and review permissions if Bridge requests unusual access.
Trezor Suite & third-party integration
Trezor Suite is the official desktop and web application for managing accounts, firmware, and settings. Bridge is the core communication layer that allows Suite to detect and communicate with connected hardware. Many third-party dApps implement Trezor protocols so you can use a familiar UI while maintaining hardware-backed security.
When connecting to third-party sites, prefer wallets that explicitly list Trezor support and show instructions for verifying addresses on-device.
Troubleshooting
- Device not recognized: Try a different USB cable or port, restart Bridge, and relaunch the browser. On macOS, check System Settings for blocked apps.
- Conflicting software: Some virtualization or USB-management tools can claim devices — temporarily disable them and test again.
- Permissions: On some Linux setups, you may need udev rules or additional permissions to allow Bridge to access USB devices.
- Reinstall Bridge: If problems persist, uninstall Bridge, reboot, and reinstall the latest version from the official site.
FAQ
- Can Bridge see my private keys?
- No. Bridge routes messages to your Trezor; private keys never leave the device and are not exposed to the host machine or browser.
- Is Bridge required to use Trezor?
- To use Trezor Suite or many browser-based dApps on desktop, Bridge or an equivalent native messaging integration is required for secure communication. Some platforms offer direct WebUSB support but Bridge provides broader compatibility and reliability.
- Can I use Bridge on public/shared computers?
- Technically yes, but avoid public machines whenever possible. If you must, ensure the OS is trusted, and never enter your recovery information on unfamiliar systems.
For official downloads, detailed guides, and support resources, visit the Trezor Help Center and Trezor Suite documentation.