Trézor Bridge is a small local application that provides a secure, privacy-preserving transport layer between your Trézor hardware wallet and web browsers. It enables web-based wallets, decentralized applications, and browser extensions to communicate with the device using standard transports (WebUSB, WebHID), while ensuring your private keys remain on the hardware.
This section explains best practices for installing Bridge in a secure manner and configuring your browser to allow device access. Follow each step carefully to reduce attack surface and verify your binary provenance.
Download installers only from the official vendor repository or verified mirror. Beware of third-party sites that may host tampered binaries.
Use sha256sum / shasum -a 256 or platform-specific tools to verify the checksum. If a detached signature is provided, verify it using the vendor's public key. Never skip this step.
chmod +x) and run. For package installs, prefer signed packages from trusted repos.Confirm Bridge is running (check process list or the system tray). Plug in your device and open an official web wallet; the site should prompt for permission. If prompted on the device display, verify the request matches your action.
Bridge is intentionally narrow in scope — to provide a local transport layer. However, security is a multi-layered responsibility. Below are concrete practices for protecting your funds and device integrity.
Keep your OS and the Bridge application updated. Run anti-malware tools as appropriate and avoid installing unnecessary software that could interact with USB devices. On multi-user systems, ensure proper file and service permissions so only authorized accounts can communicate with Bridge.
When a web app asks to connect, verify the URL and the origin. Malicious pages can try to spoof UI; always double-check the browser address bar and certificate details. On the Trezor device, examine details (addresses, amounts) and only approve transactions you recognize.
Bridge never has access to your seed phrase — that secret should be generated and stored offline. Never enter your seed on a browser or on a computer. If any party asks for your seed, treat it as a phishing attempt.
If your device is not recognized or Bridge appears unresponsive, follow these steps to isolate the issue. The goal is to determine whether the problem is the device, the cable, the OS, or the browser.
Try a different USB cable and port (avoid hubs). Make sure the device is powered and not in bootloader mode. Reboot your computer and reconnect the device.
Check site permissions, clear stored preferences for the site, then retry. In rare cases, toggling WebUSB/WebHID flags (developer settings) may be required — only do this if you understand the implications.
Restart the Bridge service or application. On Windows, check Services; on macOS, check Activity Monitor; on Linux, check system logs. Reinstall if necessary and re-verify signatures.
If problems persist, consult the official vendor support channels and provide logs only when instructed — avoid pasting sensitive information publicly.
No. Bridge is a transport layer. Your seed is stored on the hardware device and is never transmitted to the host or over the network.
Some browsers and integrations may work without Bridge via direct WebUSB/WebHID access, but Bridge provides a consistent and simpler experience across platforms.
Download the latest signed release from the official source, verify checksums and signatures, and run the installer. Enable auto-update only if you trust the vendor's release process.
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