Overview
Trezor Bridge is a small local application that creates a secure link between your Trezor hardware wallet and your web browser or desktop apps. It replaces older browser-only methods and enables modern browsers to communicate with your device over a local HTTPS channel. This guide explains why Bridge exists, how to install it, common issues, and best practices for security and updates.
Why Trezor Bridge Matters
Historically, browsers limited direct USB access for security reasons. Trezor Bridge runs on your machine and acts as an intermediary so the Trezor Suite or web wallets can safely talk to your hardware without exposing USB directly to web pages. It improves compatibility across browsers and platforms.
Installation & Setup
Step-by-step
1. Download the Bridge installer for your operating system (Windows, macOS, Linux).
2. Run the installer and follow prompts — Bridge runs in the background as a small service.
3. Connect your Trezor device via USB and open Trezor Suite or the supported web wallet. If prompted, allow connection through Bridge.
Quick CLI & GUI notes
If your OS asks for permission to run a helper or service, accept it — otherwise the browser cannot reach Bridge. On Linux, there may be udev rules to set; the Bridge installer usually handles this but see the official docs if you encounter permission errors.
Troubleshooting
Common problems
Bridge not detected: Restart the Bridge service or your computer. Check that no other wallet software is blocking USB. Try a different USB cable/port.
Browser prompts keep appearing: Clear cached permissions for the web wallet, update your browser, and ensure Bridge is the latest version.
Advanced diagnostics
Open the Bridge UI (if available) or check system logs. On Windows, look in Services or Task Manager for the Bridge process; on macOS, check Activity Monitor. Reinstalling Bridge often resolves broken installs.
Security Best Practices
Trezor Bridge only opens a local channel on your machine — it does not connect to the internet on its own. Still, treat the Bridge binary as sensitive software: download only from official sources, verify signatures when offered, and keep it updated. Never enter your recovery seed into any app; Bridge does not ask for it.
Updating & Maintenance
Bridge updates are released periodically to support new devices and browsers. Allow automatic updates where available; otherwise check the official download page regularly. When updating, disconnect your Trezor first and reconnect after installation finishes.
FAQ — Quick Answers
Do I need Bridge for Trezor Suite?
Some versions of Trezor Suite include integrated support, but Bridge is still recommended for web wallet interoperability.
Can I use Bridge offline?
Bridge operates locally and does not require internet for the USB communication itself, but wallets may need network access for transaction data.