MetaMask® Extension® - Browser extension

At the intersection of convenience and security, the MetaMask Chrome Extension stands as a gateway to the decentralized universe, providing users with a seamless bridge …

For this explainer, Chrome will be used as the browser. If you're using Firefox, the steps to download and install are very similar. Once installed, MetaMask works the same regardless of the browser.

If you have MetaMask downloaded on your phone, then you can use the "Import wallet" to integrate the wallet between your computer and phone. You can do the same thing if you want to use Metamask on multiple browsers on different computers.