MetaMask Extension | Getting Started with the Wallet Extension

MetaMask is a leading cryptocurrency wallet and gateway to decentralized applications (dApps) on Ethereum and other blockchain networks. Available as a browser extension and mobile app, MetaMask allows you to securely store, send, and receive crypto while interacting with Web3 platforms like DeFi protocols, NFT marketplaces, and more.

This guide will walk you through setting up the MetaMask browser extension—the most popular way to access Web3.

Step 1: Download & Install the MetaMask Extension

✅ Only download from the official source:

• Chrome/Brave/Edge: Chrome Web Store
• Firefox: Firefox Add-ons
• Safari (Beta): MetaMask Official Site

1. Click "Add to Chrome" (or your browser).
2. Confirm installation.
3. The MetaMask fox icon (🦊) will appear in your browser toolbar.

⚠️ Avoid fake versions—always check the developer is "MetaMask" in the store.

Step 2: Create a New Wallet

1. Click the MetaMask icon in your browser.
2. Select "Create a Wallet".
3. Agree to terms (optional: share anonymous usage data).
4. Create a strong password (this encrypts your extension—not your wallet).

🔐 Securing Your Recovery Phrase (Most Important Step!)

MetaMask will generate a 12-word Secret Recovery Phrase. This is the only way to restore your wallet.

🚨 Follow these steps carefully:

• Write down all 12 words in order on paper.
• Never save it digitally (no screenshots, emails, cloud storage).
• Store multiple copies in secure locations.
• Confirm your phrase by re-entering the words.

💡 Pro Tip: Use a metal backup (like Cryptosteel) for fire/water protection.

Step 3: Accessing Your Wallet

After setup:

• Click the MetaMask icon to open your wallet.
• Your public address (e.g., 0x...1234) appears at the top—this is where you receive crypto.
• Never share your private key or recovery phrase!

Step 4: Adding Cryptocurrencies

By default, MetaMask shows Ethereum (ETH). To add other tokens:

1. Click "Import tokens" (for custom tokens).
2. Search for tokens like USDC, SHIB, UNI, etc.
3. Toggle "Hide spam tokens" to avoid scams.

💡 Want to see NFTs? Go to the "NFTs" tab and add collections manually.

Step 5: Sending & Receiving Crypto

📥 Receiving Funds

1. Open MetaMask and click "Account 1" to copy your address.
2. Always verify the first/last few characters before sharing.
3. Send crypto from an exchange or another wallet to this address.

📤 Sending Funds

1. Click "Send".
2. Paste the recipient’s address (double-check for errors!).
3. Enter the amount and adjust gas fees (if needed).
4. Confirm the transaction.

⚠️ Test with a small amount first if sending to a new address!

Step 6: Connecting to dApps (DeFi, NFTs, etc.)

MetaMask lets you interact with Uniswap, OpenSea, and thousands of dApps.

1. Visit a dApp (e.g., Uniswap).
2. Click "Connect Wallet" → Choose MetaMask.
3. Approve the connection in your MetaMask popup.

🔒 Security Tip:

• Revoke unused connections in MetaMask → Settings → Connected Sites.
• Only connect to trusted dApps—scam sites can drain wallets.

Advanced Features

🌐 Multiple Networks

MetaMask supports Ethereum, Polygon, BSC, Arbitrum, and more.

• Click the network dropdown (default: Ethereum Mainnet).
• Select a network or "Add Network" for custom RPCs.

🔄 Swap Tokens (Built-In Exchange)

1. Click the "Swap" tab.
2. Select tokens and amounts.
3. Review fees and confirm.

💸 Cheaper Alternative? Use Layer 2 networks like Arbitrum or Optimism.

Security Best Practices

✅ Do:

• Bookmark the real MetaMask site to avoid phishing.
• Use a hardware wallet (Ledger/Trezor) with MetaMask for extra security.
• Enable auto-lock in Settings.

❌ Never:

• Enter your recovery phrase anywhere except MetaMask.
• Approve unlimited token spending ("Set Limit" instead).
• Click shady links—always verify URLs.

Need Help?

• Official Support: support.metamask.io
• Community: MetaMask Forum

You’re Ready for Web3!

With MetaMask installed, you can now:

• Hold and trade crypto securely
• Explore DeFi & NFTs
• Earn staking/yield farming rewards

👉 Next Step: Try swapping tokens on Uniswap or buying an NFT on OpenSea.