MetaMask® Extension - Browser extension

MetaMask® is a browser extension that serves as a cryptocurrency wallet and a gateway to decentralized applications (DApps) built on blockchain networks, notably Ethereum. It allows users to manage their Ethereum-based assets, including ether (ETH), ERC-20 tokens, and NFTs (non-fungible tokens), directly from their web browser.

Key features of MetaMask include:

1. Wallet Management: Users can create and manage multiple Ethereum wallets within MetaMask. Each wallet has a unique address that can send and receive Ethereum-based assets.

2. Secure Transactions: MetaMask enables users to securely send and receive Ethereum and ERC-20 tokens. Transactions can be signed directly within the extension, ensuring cryptographic security.

3. Interoperability with DApps: MetaMask acts as a bridge between the browser and Ethereum-based decentralized applications. Users can interact with various DApps directly from their browser, such as decentralized exchanges, decentralized finance (DeFi) platforms, and NFT marketplaces.

4. Token Swapping: MetaMask includes a built-in decentralized exchange (DEX) feature that allows users to swap between different ERC-20 tokens directly within the extension.

5. Custom Networks: In addition to the Ethereum mainnet, MetaMask supports various Ethereum test networks (Ropsten, Rinkeby, Kovan, and Goerli) and custom networks, enabling developers to test and deploy smart contracts on alternative networks.

6. Security Features: MetaMask prioritizes security, offering features such as seed phrase backup and hardware wallet integration (e.g., Ledger and Trezor). Users can also set up password protection for their MetaMask wallets.

7. Privacy: MetaMask provides users with control over their data and privacy settings. Users can manage permissions for DApps and control the information shared with them.

MetaMask has gained popularity as one of the most widely used Ethereum wallets and browser extensions for interacting with decentralized applications. It plays a crucial role in facilitating the adoption of blockchain technology by providing a user-friendly interface for accessing the decentralized web.