How to Use MetaMask Wallet for the First Time

Setting Up MetaMask in Firefox

1. Launch Firefox browser and navigate to the Add-ons section.

2. Search for “MetaMask” in the extension marketplace.

3. Click “Add to Firefox” and confirm the installation prompt.

4. Once installed, click the fox icon in the top-right corner to open the extension interface.

5. Select “Get Started”, then accept the Terms of Service and Privacy Policy.

6. Choose “Create a Wallet”, enter a strong password, and confirm it.

7. Write down the 12-word recovery phrase on paper—never store it digitally.

8. Verify the seed phrase by selecting words in correct order to complete setup.

Connecting to Test Networks

1. Open MetaMask and click the network dropdown in the top-left corner.

2. Select “Goerli Test Network” from the list—Ropsten is deprecated as of 2024.

3. Confirm the switch; the interface will refresh with Goerli’s chain ID (5).

4. Visit a Goerli faucet site like goerlifaucet.com or faucets.chain.link.

5. Paste your MetaMask address into the input field and request test ETH.

6. Wait for confirmation; successful receipt appears as balance change in wallet UI.

7. Repeat this process for other EVM-compatible testnets such as Sepolia or Base Sepolia if required.

Interacting with CORE DAO Airdrop

1. Ensure MetaMask is connected to the Ethereum mainnet or appropriate CORE-supported chain.

2. Navigate to the official CORE DAO website using a verified URL—avoid third-party links.

3. Click the wallet connect button (black circular “W” icon) and select MetaMask.

4. Approve the connection request inside the MetaMask popup window.

5. Once connected, the icon turns multicolored—this signals active session status.

6. Open the hamburger menu (three horizontal lines), then select “Airdrop”.

7. Choose “China” from nationality options and click “Confirm”.

8. On the next screen, verify your wallet address and click “Next”.

9. When “Claim” becomes black—not gray—click it to initiate transaction submission.

10. Review gas fee and wallet balance before confirming the final signature request.

Using MetaMask with Web3 Applications

1. DApps detect MetaMask automatically when loaded over HTTPS—file:// URLs are unsupported.

2. Modern versions expose window.ethereum, not window.web3, as the primary interface.

3. Developers must request account access via ethereum.request({ method: 'eth_requestAccounts' }).

4. Balance queries use ethereum.request({ method: 'eth_getBalance', params: [address, 'latest'] }).

5. Transaction signing requires user approval through MetaMask’s modal dialog.

6. Switching chains programmatically uses ethereum.request({ method: 'wallet_addEthereumChain', params: [...] }).

7. Error handling must account for user rejection, network mismatch, or insufficient funds.

Frequently Asked Questions

Q: Why does MetaMask show “Not connected” even after clicking “Connect Wallet”?A: This occurs when the DApp fails to detect window.ethereum—verify the site loads over HTTPS and that no ad blocker interferes with script injection.

Q: Can I import a Ledger hardware wallet into MetaMask?A: Yes—select “Import Account” > “Hardware Wallet”, choose Ledger, and follow device prompts to authorize address derivation.

Q: What happens if I lose my 12-word phrase?A: All assets and access are permanently unrecoverable—no central authority can restore it.

Q: Is it safe to use MetaMask on mobile browsers?A: Mobile Safari and Chrome do not support MetaMask extension injection—use the official MetaMask Mobile app instead.