MetaMask
Most popular Ethereum Web3 wallet — browser extension and mobile app.
MetaMask is a non-custodial Web3 wallet functioning as a browser extension (Chrome, Firefox, Brave) and mobile app, serving as "identity" and "bank" for the Web3 ecosystem.
Functions:
•Ethereum and EVM-compatible chains (Polygon, BNB Chain, Arbitrum, Optimism...)
•Connects to dApps — signatures without sending password
•Token swap — directly inside MetaMask (with fee)
•Portfolio view — all EVM addresses in one place
•Ledger/Trezor integration — hardware wallet control through MetaMask
How to add new network: Settings → Networks → Add Network or automatically through Chainlist.org
Security:
•Non-custodial — private keys are on your device
•12-word seed phrase — keep offline
•Phishing risk — always verify dApp URL
•Never approve "revoke" in scam — check approvals on revoke.cash
Alternatives: Rabby Wallet (better security score), Rainbow, Coinbase Wallet.