If you want to build a browser extension that works across multiple browsers, then WebExtensions APIs are the way to go. They provide a common API for Chrome, Firefox, Edge, and other browsers, so you don't have to learn a different API for each browser. In this card, we'll explore the basics of WebExtensions APIs and how to use them to build a cross-browser extension. We'll also look at
converting a web extension for Safari if you want to make your extension available on Apple devices. And if you have a Google Chrome extension that you want to port to Firefox, you can follow this
guide on porting a Google Chrome extension to Firefox.