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🔌 Trezor Bridge – Full Guide

🧩 What Is Trezor Bridge?

Trezor Bridge is a background communication tool that allows your Trezor hardware wallet to interface with browser-based applications, such as Trezor Suite Web and other third-party crypto platforms.

It acts as a local server running on your computer, enabling secure communication between your browser and the Trezor device over USB. Unlike browser extensions (like the now-deprecated Trezor Chrome extension), Trezor Bridge offers broader browser compatibility, better security, and improved performance.

⚙️ How Trezor Bridge Works

1. You connect your Trezor hardware wallet to your computer.
2. Trezor Bridge runs quietly in the background as a system service.
3. When you open a supported web app (like suite.trezor.io/web), the app communicates with Bridge through localhost.
4. Bridge transmits data securely between the web interface and your Trezor device.

✅ Important: No private keys or recovery seeds ever leave your Trezor device. The Bridge only handles communication, not sensitive data.

💻 When You Need Trezor Bridge

You need Trezor Bridge if you're using:

• Trezor Suite Web (suite.trezor.io/web)
• Third-party web wallets that support Trezor, such as:
  • MetaMask (hardware wallet connection)
  • MyEtherWallet (MEW)
  • Electrum (via bridge-compatible integrations)
• Browsers other than Chrome, or in cases where browser extensions are blocked or deprecated

📌 You don’t need Trezor Bridge if you use Trezor Suite Desktop, which communicates directly with your Trezor device without Bridge.

🖥️ Supported Operating Systems

Trezor Bridge is available for:

• Windows
• macOS
• Linux

It works with modern browsers, including:

• Google Chrome
• Mozilla Firefox
• Microsoft Edge
• Brave

✅ Safari is not officially supported due to WebUSB limitations.

🛠 How to Install Trezor Bridge

1. Visit the official site: https://trezor.io/bridge
2. Download the appropriate installer for your operating system.
3. Run the installer and follow on-screen instructions.
4. After installation, restart your browser.

Once installed, the Bridge runs as a background service and launches automatically on system startup.

🧪 How to Verify It’s Working

• Open suite.trezor.io/web
• Connect your Trezor device
• If the device is detected, Bridge is working

If you see a message saying “Trezor device not recognized”, follow the troubleshooting steps below.

🧰 Troubleshooting Trezor Bridge

❌ Device Not Detected?

• Make sure Trezor Bridge is installed
• Restart your browser or computer
• Try a different USB cable or port
• Ensure you’re not using ad blockers or security extensions that block localhost communication
• On macOS, make sure to allow Trezor Bridge in System Preferences > Security & Privacy

🧼 Clear Conflicts

• Remove the old Trezor Chrome extension if still installed
• Make sure only one instance of the Bridge is running

🔒 On Linux

• Install udev rules so your system can detect the USB device:
• sudo apt install -y libusb-1.0-0
wget -P /etc/udev/rules.d https://data.trezor.io/udev/51-trezor.rules
sudo udevadm control --reload-rules
sudo udevadm trigger


🔐 Is Trezor Bridge Secure?

Yes. Trezor Bridge is:

• Developed and maintained by SatoshiLabs, creators of Trezor
• Open-source and publicly audited
• Uses secure communication with localhost only (not over the internet)
• Does not handle private keys, recovery seeds, or PINs

Your keys remain on your Trezor hardware wallet at all times.

📦 Technical Details

• Installs as a background service (Windows/macOS/Linux daemon)
• Runs locally at http://127.0.0.1:21325
• Uses HTTPS for secure communication with browsers and apps
• Open-source repo: https://github.com/trezor/trezord-go

🔁 Keeping Trezor Bridge Updated

• Regularly check trezor.io/bridge for updates
• The Trezor Suite Web app will notify you if your Bridge version is outdated
• New versions include compatibility fixes, security patches, and performance improvements

🧠 Summary: Why Trezor Bridge Matters

FeatureBenefitSecure communicationConnects your Trezor to web apps without exposing sensitive dataCross-platformWorks on Windows, macOS, and LinuxBrowser-independentNo reliance on extensions or specific browser APIsEssential for web accessRequired to use Trezor on browsers with suite.trezor.io/webOpen-sourceFully transparent and community-reviewed

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