A progressive web application (PWA), or progressive web app, is a type of application software delivered through the web, built using common web technologies including HTML, CSS, JavaScript, and WebAssembly. It is intended to work on any platform with a standards-compliant browser, including desktop and mobile devices. Since a progressive web app is a type of webpage or website known as a web application, it does not require separate bundling or distribution. Developers can simply publish the web application online, ensure that it meets baseline installation requirements and that users will be able to add the application to their home screen. Publishing the app to digital distribution systems like Apple App Store or Google Play is optional. As of 2021, PWA features are supported to varying degrees by Google Chrome, Apple Safari, Firefox for Android, and Microsoft Edge but not by Firefox for desktop.
