Why is MetaMask not finding my Trezor Model T?

Understanding Wallet Connectivity Between MetaMask and Hardware Devices

1. MetaMask is a software-based Ethereum wallet that supports integration with external hardware wallets like Trezor Model T through bridge protocols. However, direct USB or Bluetooth connectivity is not supported in the same way as desktop applications such as Trezor Suite. Instead, communication occurs via browser extensions and WebUSB standards.

2. The absence of detected devices often stems from compatibility layers not being properly initiated. Users must ensure they are using the Chrome or Brave browser, both of which support WebUSB for hardware wallet interactions. Firefox lacks full WebUSB support, which can lead to detection failures.

3. Before attempting connection, confirm that the Trezor Model T firmware is updated to the latest version. Older firmware may not recognize newer WebUSB handshake protocols used by MetaMask’s integration layer. Firmware updates are managed through the official Trezor Suite application.

4. When connecting, users must physically approve access on the Trezor device itself. If the “Connect to computer” prompt appears on the screen and remains unconfirmed, MetaMask will register no device presence. This security feature prevents unauthorized access but may be mistaken for a technical failure.

5. Browser permissions play a crucial role. Ensure that site access to USB devices is allowed for the domain where MetaMask operates. In Chrome, this can be verified under Site Settings > USB. Blocking USB access at the browser level effectively disables any hardware wallet detection regardless of physical connection status.

Troubleshooting Steps for Device Recognition Issues

1. Restart both the browser and the Trezor Model T. A fresh boot cycle clears temporary states that might interfere with device enumeration. Close all tabs running MetaMask before restarting.

2. Try a different USB cable, preferably the original one provided with the Trezor Model T. Some cables support power delivery only and lack data transmission capabilities, which prevents proper device identification.

3. Test the setup using Trezor Suite first. If the device isn’t recognized there, the issue lies outside MetaMask—possibly driver-related or stemming from operating system restrictions. Successful recognition in Trezor Suite isolates the problem to MetaMask configuration.

4. Disable conflicting browser extensions. Other cryptocurrency tools or ad blockers may intercept or block WebUSB requests. Run a test in an incognito window with only the MetaMask extension enabled.

5. Reinstall the MetaMask extension. Corrupted extension files can disrupt interaction with external APIs responsible for hardware wallet bridging. Removing and reinstalling ensures a clean state for the next connection attempt.

Configuration Requirements for Seamless Integration

1. Access MetaMask settings and navigate to the “Import Account” section. Select “Hardware Wallet” and choose “Trezor” from the list. The interface will then prompt for device connection, initiating the WebUSB handshake process.

2. Ensure the operating system has the necessary drivers installed. Windows typically handles this automatically, but older versions may require manual installation of libusb drivers via Zadig tool for proper USB communication.

3. Use the correct account derivation path. MetaMask defaults to m/44'/60'/0'/0 for Ethereum accounts. If funds were previously accessed using a custom path, manually inputting it during import may resolve visibility issues.

4. Avoid using virtual machines or remote desktop environments when connecting hardware wallets. These setups often fail to pass through USB devices correctly, leading to undetected hardware even when physically connected.

5. Confirm that no other application is currently accessing the Trezor device. Only one program can hold an active session at a time. Running Trezor Suite, Electrum, or another wallet interface simultaneously blocks MetaMask from establishing its own connection.

Frequently Asked Questions

Can I use MetaMask with Trezor Model T on mobile devices?MetaMask Mobile does not support direct hardware wallet connections. Users must rely on desktop browsers for Trezor integration. Workarounds involving QR code signing exist but are limited to specific dApps and do not enable full wallet import into the mobile app.

Why does MetaMask show “No Trezor devices found” even though my device is plugged in?This message usually indicates a failed WebUSB handshake. Check if the device appears in chrome://devices/under “Universal Serial Bus devices.” If missing, the OS or browser isn’t detecting the hardware. Updating USB drivers or switching ports may resolve low-level detection issues.

Does MetaMask support multiple accounts from the same Trezor Model T?Yes, after importing the first account, users can add additional ones by selecting “Import Account” again and choosing a different address index. Each account corresponds to a unique derivation path, allowing management of several addresses secured by the same seed phrase.

Is it safe to connect my Trezor Model T to MetaMask through a browser?The connection is secure as long as it occurs over HTTPS and uses the official MetaMask extension. Private keys remain on the Trezor device; only signed transactions leave it. Always verify the website’s authenticity and avoid phishing domains mimicking MetaMask’s interface.