MetaMask is a browser extension wallet for Ethereum-based cryptocurrencies. It provides a secure and convenient way to manage digital assets, interact with decentralized applications (dApps), and sign transactions directly within your browser. It enhances the user experience of engaging with the Ethereum blockchain and its ecosystem of decentralized applications.metamask extension ||

you cannot perform Cash App login task without the app. Cash App requires the mobile app or a web browser to access your account. The app provides the necessary functionality to send/receive money, manage your Cash App balance, and access other features offered by the service.