How to Install MetaMask Extension
MetaMask is available for Chrome, Edge, Brave, and Firefox through each browser's extension store. To install safely follow these steps:
- Visit the official MetaMask website at metamask.io and choose your browser.
- Click the official store link and confirm the publisher is MetaMask or ConsenSys.
- Add the extension and pin it to your toolbar for easy access.
- Create a new wallet or import an existing one using a secure seed phrase; never paste it into websites.
Key Features
Account Management
Multiple accounts, token tracking, and account labeling.
Network Switch
Switch between Ethereum mainnet, testnets, and custom RPC networks.
Transaction Signing
Approve or reject transactions with clear gas fee previews.
Hardware Wallet Support
Connect Ledger or Trezor for added private key security.
Security Best Practices
Security is paramount. Follow these recommendations to protect funds:
- Only install MetaMask from the official website or verified store listings.
- Securely store your seed phrase offline in a hardware wallet or encrypted vault; never type it into a webpage.
- Use a hardware wallet for large balances and enable account-level confirmations.
- Verify contract details and requested permissions when connecting dApps.
Troubleshooting Common Issues
- If MetaMask isn't detecting a dApp, ensure the site calls
ethereum.request({ method: 'eth_requestAccounts' })and the extension is enabled. - Clear browser cache, restart the browser, or reinstall the extension if connectivity fails.
- Check for conflicting extensions and disable them temporarily.
Developer Integration Notes
Developers should detect the provider safely and follow user permission patterns:
if (window.ethereum) {
const provider = window.ethereum;
try { await provider.request({ method: 'eth_requestAccounts' }); }
catch (e) { console.error('User rejected'); }
} else {
// Prompt user to install MetaMask
}
Advanced Tips
- Use ethers.js with a provider abstraction for cleaner code and retries.
- Signal transaction intent to users with human-readable summaries before calling sendTransaction.
- Offer connection fallback instructions for users on mobile or non-supported browsers.
Disclaimer
This guide is for educational purposes and is not affiliated with MetaMask or ConsenSys. Always download the extension from official sources and use best practices when handling private keys and seed phrases.