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While initially developed as a Chrome extension, MetaMask is also available for other browsers like Firefox and Brave, providing cross-browser support for accessing Ethereum-based services. MetaMask provides a convenient and secure way for users to manage their Ethereum-based assets, interact with decentralized applications, and participate in the growing ecosystem of decentralized finance (DeFi) and Web3 applications. MetaMask is a popular cryptocurrency wallet and decentralized application (dApp) browser extension for the MetaMask Chrome Extension.