WebMetamask® Chrome® Extension® | Getting started with MetaMask. Learn how to use the Metamask extension, a browser plugin that lets you store Ethereum and other MetaMask supports Firefox, Google Chrome, and Chromium-based browsers. We recommend using the latest available browser version. For up to the minute news MetaMask Extension emerges as a catalyst for decentralization, enabling users to harness the power of Ethereum and seamlessly interact with a myriad of dApps Getting started with Metamask® Chrome® Extension®. Learn how to use the Metamask extension, a browser plugin that lets you store Ethereum and other tokens The Open your browser: Launch your preferred web browser. Go to the MetaMask Extension website: Type " MetaMask " into your search engine or directly navigate to metamask.io.