Troubleshooting Trezor Bridge Connectivity

1. What Is Trezor Bridge?

Trezor Bridge is a lightweight communication tool that connects your hardware wallet to Trezor Suite or browser extensions. It allows local USB communication between your Trezor device and supported crypto apps without requiring browser-specific add-ons.

When functioning correctly, Bridge silently runs in the background at 127.0.0.1:21325. If your wallet isn’t being detected, the issue usually lies in service disruption, permission restrictions, or outdated Bridge versions.

2. Common Connection Errors

Users often encounter issues like “Device not recognized” or “Bridge not running.” Here are the most common reasons:

• Bridge service is not running on your operating system.
• Outdated version of Bridge or browser cache conflict.
• Firewall or antivirus blocking localhost communication.
• USB port malfunction or low-quality cable.
• Permission restrictions in macOS or Windows security settings.

3. How to Verify Bridge Installation

To check if your Bridge is installed correctly, follow these steps:

• Go to trezor.io/bridge and ensure you have the latest version.
• After installation, restart your browser.
• Plug in your Trezor device and open Trezor Suite.
• If prompted, allow the app to communicate via “localhost.”

If none of these steps work, you may need to reinstall Bridge completely.

4. Reinstalling Trezor Bridge

Corrupted installations are a frequent cause of issues. Here’s how to cleanly reinstall Bridge:

1. Uninstall the current version from your system settings.
2. Download a fresh copy from the official Bridge page.
3. Run the installer as Administrator (Windows) or using sudo (Linux).
4. Restart your computer and reconnect your device.

5. Browser Compatibility Tips

Trezor Bridge supports most modern browsers, including Chrome, Edge, Firefox, and Brave. However, cached service workers or extension conflicts can cause temporary detection problems.

• Clear browser cache and cookies.
• Disable conflicting wallet extensions like MetaMask temporarily.
• Ensure browser version is up to date.
• Use Trezor Suite Web via HTTPS connection for full security.

6. Fixing USB Recognition Issues

Bridge cannot operate if your system doesn’t detect the Trezor hardware device itself. Try these fixes:

• Switch to another USB port or cable.
• Connect directly to your motherboard (avoid hubs).
• On Linux, add udev rules as described on Trezor Learn.
• On macOS, approve the device under System Preferences → Security & Privacy.

7. Firewall and Antivirus Exceptions

Security suites can sometimes treat local connections as external threats. Allow Bridge explicitly through your firewall:

• Add trezord.exe or trezord-go as a trusted application.
• Whitelist port 21325 in both inbound and outbound rules.
• Exclude the Bridge installation directory from antivirus scanning.

8. Advanced Diagnostic Steps

If basic fixes don’t work, run these diagnostics:

• Open the Bridge status page: 127.0.0.1:21325/status
• Use browser console logs to identify permission errors.
• Check system logs for “trezord” events.
• Contact Trezor Support and attach logs if needed.

9. Preventive Maintenance Tips

Keeping Bridge up to date minimizes downtime and security risks:

• Update Trezor Suite and firmware regularly.
• Install Bridge updates directly from trezor.io/bridge.
• Avoid using Bridge in public or shared computers.

Maintaining proper hygiene ensures seamless communication between your wallet and the Bridge daemon.

10. Summary

Trezor Bridge is crucial for the secure connection between your hardware wallet and Trezor Suite. Most connection issues can be fixed by verifying the installation, clearing browser cache, or reinstalling Bridge from official sources. If all else fails, the Trezor Support Team is always available to assist you.