The Metamask extension serves as a secure wallet integrated directly into your browser, enabling seamless interaction with Ethereum-based applications without the need for a full Learn how to create and use a MetaMask wallet extension for Chrome, Firefox, Brave, or Edge. MetaMask lets you access NFTs, DEXs, DeFi apps, and more with Ethereum. MetaMask is a cryptocurrency wallet and decentralized application (dApp) browser extension that simplifies the process of interacting with blockchain-based applications. It was initially MetaMask is a web browser extension Metamask extension and mobile app that allows you to manage your Ethereum private keys and interact with decentralized applications. Learn how to install, configure, fund,