How to use MetaMask with a Trezor wallet? (Hardware Security)

Connecting Trezor to MetaMask

1. Ensure your Trezor device is updated to the latest firmware using the Trezor Suite application.

2. Install the official MetaMask browser extension from metamask.io—avoid third-party sources.

3. Open MetaMask, click the account icon in the top-right corner, and select “Connect Hardware Wallet.”

4. Choose “Trezor” from the list of supported devices and confirm the selection.

5. Plug in your Trezor via USB, unlock it with your PIN, and approve the connection request on its screen.

Enabling Ethereum Support on Trezor

1. Launch Trezor Suite and navigate to the device settings under “Manage Coins.”

2. Locate Ethereum (ETH) in the coin list and toggle it on—this activates the Ethereum app on the device.

3. Confirm the change directly on the Trezor display; the device may reboot briefly.

4. If you plan to interact with ERC-20 tokens or Layer 2 networks, ensure “Ethereum Classic” and “Testnet support” are enabled if required by your use case.

5. Do not disable U2F or WebUSB permissions in your browser settings—they are essential for secure communication between MetaMask and Trezor.

Accessing Accounts in MetaMask

1. After successful hardware wallet connection, MetaMask displays a list of Ethereum accounts derived from your Trezor’s seed.

2. Each account corresponds to a specific derivation path—by default, MetaMask uses m/44'/60'/0'/0, the standard BIP-44 Ethereum path.

3. You can add additional accounts by clicking “Create Account” and selecting “Hardware Wallet” again—MetaMask will fetch the next sequential address.

4. Never enter your Trezor recovery seed into MetaMask or any software interface—all signing occurs exclusively on the Trezor device.

5. Verify the displayed address on both MetaMask and Trezor screen before confirming any transaction.

Signing Transactions Securely

1. Initiate a transaction in MetaMask—such as sending ETH or approving a token contract.

2. MetaMask sends the unsigned transaction data to the Trezor device over WebUSB.

3. The Trezor renders the full transaction details—including recipient, amount, gas fee, and smart contract interaction—on its physical screen.

4. You must manually confirm each field on the device using button presses; no action taken on the computer alone suffices.

5. If the Trezor shows an unrecognized contract address or abnormal gas price, reject the transaction immediately.

Frequently Asked Questions

Q: Can I use MetaMask with Trezor on mobile browsers?A: No. MetaMask mobile does not support hardware wallet connections. Use Trezor Suite mobile for direct Trezor interactions or desktop MetaMask with Chrome/Firefox.

Q: Why does MetaMask show “Account Not Found” after connecting Trezor?A: This usually occurs when Ethereum is disabled in Trezor Suite or the firmware is outdated. Re-enable ETH in coin management and update firmware.

Q: Does MetaMask store my private keys when using Trezor?A: No. MetaMask never accesses or stores private keys. All cryptographic operations happen inside the Trezor hardware. MetaMask only handles UI, network requests, and transaction broadcasting.

Q: Can I use Trezor with MetaMask on multiple computers?A: Yes. Your Trezor device remains the sole source of truth. As long as each computer has MetaMask installed and proper USB/WebUSB permissions, you can connect and sign across environments without risk.