In this chapter, we are going to look into MetaMask and the Remix IDE for Solidity contract development. To install and configure those tools, you first need to satisfy their technical requirements:

• Latest version of npm and Node.js.
• MetaMask: MetaMask is an open source, internet browser plugin that you can install from https://metamask.io/. This is officially supported for Google Chrome, Firefox, Opera, and Brave internet browsers. There are no additional requirements for working with MetaMask. The MetaMask source code can be found on GitHub at https://github.com/MetaMask/metamask-extension.
• Online Remix IDE: The Remix IDE is an online version of the Solidity editor and Integrated Development Environment (IDE). You can access the IDE by opening the https://remix.ethereum.org in your internet browser.
• remixd: remixd is an open source, command-line tool to open contract files present on your local machine in the online version of the Remix IDE. The remixd source code can be found on GitHub at https://github.com/ethereum/remixd.
• remix-ide: remix-ide is the open source, locally-installed version of Remix IDE. You first need to install npm and node.js. The Remix IDE source code can be found on GitHub at https://github.com/ethereum/remix-ide.