Step 1 — Download from the official source
Always visit the official Trezor Bridge page at trezor.io/bridge. Avoid search ads and third-party download mirrors. The official page lists installers for Windows, macOS, and Linux. Choose the installer that matches your operating system.
Pro tip: verify the domain (trezor.io) and the certificate in your browser's address bar to ensure authenticity before downloading.
Step 2 — Run the installer
Close your browser before beginning the installation if the installer recommends it. Run the installer and follow the on-screen prompts. On Windows, the installer will register Bridge as a background service. On macOS, you may need to allow the installer in System Preferences (Security & Privacy) the first time. For Linux, follow the provided instructions for your distro (AppImage, .deb, or other packaging).
After installation, Bridge will usually start automatically and sit in the background. There is no need to open the application every time you want to use your Trezor device; supported web apps will detect Bridge when needed.
Step 3 — Connect your Trezor device
- Use the original USB cable if possible. Plug the cable into the device and the computer.
- When you connect the Trezor for the first time, your OS might ask for permissions—grant them so Bridge can access the device over USB.
- Open Trezor Suite or a web-based wallet that supports Trezor Bridge.
When a site requests access to your Trezor, Bridge will relay the request. Confirm operations directly on the device screen; never confirm a request if the on-device details look incorrect.
Troubleshooting common issues
No device detected? First, ensure Bridge is running: on Windows you can check the Services list, on macOS look for the process in Activity Monitor, and on Linux check the running processes. If Bridge is not running, restart your computer and try connecting your Trezor again. Try a different USB port or cable. Also, ensure your browser is up to date; old browser versions may lack Bluetooth/USB fixes.
Browser prompts or permissions errors? Some OS/browser combos require you to grant USB permissions or allow a helper application to run. If prompted, allow the permission for Bridge. It is normal for the first-time permission dialog to appear.
Site not connecting to the device? Confirm the site supports Trezor Bridge. Try connecting first in a known-compatible site such as Trezor Suite or an officially recommended web wallet. Closing and reopening your browser can help reinitialize connections.
Advanced tips & safety reminders
Keep firmware and Bridge updated: firmware updates patch security issues and add features. Bridge updates are released periodically—either they install automatically or you will be prompted on the official site. Never enter your 24-word recovery seed into any computer or website. If a site asks for the seed, close the page immediately. The seed is only for device recovery and should stay offline, written on paper or stored in a secure hardware backup, not typed into any app.
Using Bridge with third-party dApps
Many reputable decentralized applications integrate with Trezor via Bridge. When you connect a dApp for the first time, it will request access; carefully review the permissions requested and make sure the domain is the correct official site. Use Bridge together with trusted dApps for token swaps, DeFi interactions, and NFT operations. For high-value transactions, double-check details on your device before confirming the signature.
When to reinstall Bridge
If you encounter persistent issues—such as repeated detection failures or strange permission errors—reinstalling Bridge often resolves the problem. Uninstall the current Bridge installation, restart your computer, download the latest installer from trezor.io/bridge, and reinstall. This clears corrupted files and ensures a fresh, compatible setup.
Final checklist
Before you interact with important transactions, follow this quick checklist:
- Confirm Bridge is installed and running.
- Use the original USB cable and a reliable port.
- Update Trezor firmware and Bridge to latest versions.
- Verify the web app domain and certificate.
- Confirm transaction details on your Trezor device screen.
By following these steps you ensure that Trezor Bridge works reliably and that your device remains the secure anchor for all signing operations.