MetaMask

Open your browser, add the extension, and you’re ready to use web3 without leaving your tab. On first launch, create a wallet, write down the Secret Recovery Phrase, and set a strong password. Add networks you plan to use—Ethereum mainnet, popular Layer 2s like Arbitrum, Optimism, Base, or Polygon—or define a custom RPC for a private chain. If you use a hardware wallet, pair it so you can sign from a secure device while keeping the same interface. Before connecting to any site, review the permission request, choose the account to expose, and confirm only what you need.

For DeFi, connect to a DEX, approve the token once, then execute swaps with clear slippage and deadline controls. Use gas presets or set a custom tip, and watch the live fee estimate before you commit. If a transaction stalls, speed it up with a higher fee or cancel it if it hasn’t been mined. Add tokens by contract address when they don’t auto-appear, and check your activity feed to verify hashes and statuses in real time. When an app asks for a spending allowance, cap it to the exact amount you need, and later revoke unused approvals with a permissions manager to reduce risk.

Managing assets is equally direct on mobile. Scan a QR code to connect via WalletConnect, send funds to a friend using an ENS name, or request payment by sharing your address. Mint and trade NFTs by connecting to a marketplace; confirm signatures for listings and verify the collection and chain before approving. If you’re new to crypto, buy a starter amount through a built‑in fiat on‑ramp using a card or bank transfer, then move those funds into lending, staking, or swaps without leaving the app. Use price alerts and balance updates to decide when to act, and lock the app with biometrics for quick, secure access on the go.

Builders can point their dapps to test networks, request faucet funds, and prompt users to switch chain automatically with a single click. When asking for signatures, prefer human‑readable typed data so users can see exactly what they’re approving. Inspect raw call data, gas, and nonce before sending, and export logs if you need to debug a failing transaction. Keep multiple accounts for testing different roles, set custom RPC endpoints for staging environments, and use watch‑only addresses to monitor contracts without exposing keys. When you’re ready to ship, guide users through first‑run steps: connect, set allowances conservatively, and confirm the final transaction with clear fee context.