Connect Your Trezor Device Securely

Trezor Bridge is a lightweight communication software that enables your web browser to interact with your Trezor hardware wallet. Modern browsers have security restrictions that prevent direct USB device access. Bridge acts as a secure intermediary, creating a local server on your computer that your browser can safely communicate with. Without Bridge, you won't be able to use web-based cryptocurrency wallets with your Trezor device. It's essential for accessing Trezor Suite and most third-party wallet applications.

If your device isn't detected, try these troubleshooting steps in order: 1) Ensure Bridge is installed and running (check your system tray/menu bar). 2) Try a different USB port, preferably directly on your computer rather than through a hub. 3) Use the official Trezor USB cable or a certified replacement. 4) Restart Bridge by quitting it completely and relaunching. 5) On Linux, ensure udev rules are properly configured. 6) Check if your antivirus or firewall is blocking Bridge. 7) Restart your computer. 8) Uninstall and reinstall Bridge. 9) Try a different browser. If none of these work, your USB cable or device may be faulty—contact Trezor support.

Yes, Trezor Bridge supports multiple browsers at the same time. Once Bridge is installed and running on your system, any supported browser can communicate with it. However, only one browser session can actively communicate with your Trezor device at any given moment. If you try to access your device from two browsers simultaneously, you'll need to refresh the inactive session. This is a security feature to prevent conflicting commands being sent to your hardware wallet.

Trezor Bridge automatically checks for updates when you launch it. If a new version is available, you'll see a notification. To update manually: 1) Download the latest version from the official Trezor website. 2) Close any browser windows using your Trezor device. 3) Quit Bridge from your system tray or menu bar. 4) Run the new installer—it will automatically uninstall the old version and install the new one. 5) Restart Bridge. Your settings and configurations are preserved during updates. We recommend updating whenever a new version is released to ensure you have the latest security patches and features.

Trezor Bridge is completely safe and designed with security as the top priority. It's open-source software, meaning the code is publicly available for security audits. Bridge never has access to your private keys—they remain safely stored on your Trezor hardware wallet at all times. Bridge only facilitates communication between your browser and device; all cryptographic operations happen on the hardware wallet itself. Additionally, all data transmitted between your browser and Bridge is encrypted. The software is digitally signed by Trezor to prevent tampering, and it operates entirely locally on your machine without sending any data to external servers.

Uninstalling Trezor Bridge is straightforward: On Windows, go to Control Panel > Programs and Features, find Trezor Bridge in the list, and click Uninstall. On macOS, drag the Trezor Bridge application from your Applications folder to the Trash, then empty the Trash. On Linux, use your package manager (e.g., 'sudo apt remove trezor-bridge' for Debian/Ubuntu or 'sudo rpm -e trezor-bridge' for Fedora/RedHat). Note that uninstalling Bridge will prevent you from using your Trezor device with web-based wallets until you reinstall it. Your Trezor device and cryptocurrency holdings are not affected by uninstalling Bridge.

Linux requires proper udev rules to allow non-root users to access USB devices like Trezor. To fix permission errors: 1) Download the udev rules file from Trezor's GitHub repository (trezor-common/udev rules). 2) Copy the file to /etc/udev/rules.d/ with a command like 'sudo cp 51-trezor.rules /etc/udev/rules.d/'. 3) Reload udev rules with 'sudo udevadm control --reload-rules && sudo udevadm trigger'. 4) Unplug and replug your Trezor device. 5) You may need to add your user to the 'plugdev' group with 'sudo usermod -aG plugdev $USER' and then log out and back in. After these steps, your Trezor should be recognized without permission issues.

Some antivirus software may flag Trezor Bridge as suspicious because it creates a local server and communicates with hardware devices—behaviors that can appear unusual to automated security scanners. This is a false positive. Trezor Bridge is legitimate, digitally signed software from a trusted company. To resolve this: 1) Verify you downloaded Bridge from the official Trezor website. 2) Check the digital signature to ensure authenticity. 3) Add Trezor Bridge to your antivirus whitelist or exceptions list. 4) If you're still concerned, you can review the open-source code on GitHub before installation. Never download Bridge from third-party websites, as this could expose you to malware disguised as Bridge.

Yes, once installed, Trezor Bridge works entirely offline. It doesn't require an internet connection to facilitate communication between your browser and Trezor device. However, you will need an internet connection for: 1) Downloading and installing Bridge initially. 2) Checking for and installing updates. 3) Using web-based wallet applications (though the wallet interface needs internet, Bridge itself doesn't). Bridge operates as a local service on your computer and never sends your data to external servers, making it safe to use on air-gapped systems if needed.

Absolutely! Trezor Bridge is designed to work with any web-based application that supports Trezor hardware wallets. This includes popular third-party wallets like MetaMask (when using Trezor as a hardware wallet), MyEtherWallet, MyCrypto, Electrum, and many others. Bridge provides a standardized communication interface that any compatible application can use. When you connect your Trezor to a third-party wallet, Bridge handles the technical communication while you still benefit from your Trezor's security. Always verify that you're using reputable wallet applications and double-check addresses on your Trezor screen before confirming transactions.

To check your current Bridge version: 1) Look in your system tray (Windows) or menu bar (macOS/Linux) for the Bridge icon. 2) Click the icon and select 'About' or 'Version' from the menu. 3) Alternatively, open your browser and navigate to http://localhost:21325/ (Bridge's local port). You'll see a status page displaying the version number. 4) On macOS, you can also right-click the Bridge application in your Applications folder and select 'Get Info' to see version details. Knowing your version is helpful when troubleshooting or when checking if you need to update.

A port conflict means another application is already using port 21325, which Bridge needs for communication. To resolve: 1) Check if you accidentally have multiple instances of Bridge running—quit all instances and restart just one. 2) Identify what's using the port with command-line tools (e.g., 'netstat -ano | findstr 21325' on Windows or 'lsof -i :21325' on macOS/Linux). 3) Close the conflicting application or configure it to use a different port. 4) If the conflict persists, restart your computer to clear any stuck processes. 5) In rare cases, you may need to temporarily disable other USB communication software. After resolving the conflict, Bridge should start normally.