MetaMask Extension is an extension by which you can access the Ethereum-based apps or decentralized apps in your browser. It helps warns the user in navigating the sites that are suspected to be involved in phishing activities or that have a name matching the popular phishing targets.
You can get back into your account by entering the email address and the password. After completing the login prerequisites, you are ready to go with using the MetaMask extension. Every time you wish to perform activities through MetaMask, you’ll have to log in.