Just press the power and home buttons at the same time. Your screenshot will be stored in the Gallery app.
This article covers the basic features of Firefox OS - apps, messaging, contacts, music and more. It also links to articles that you'll want to explore later.
The Firefox Marketplace has apps designed for your Firefox OS device. We'll show you how to find and install them.
Firefox OS has a feature that lets you tell websites not to track your browsing behavior. Learn what tracking is, how the feature works and how to turn it on.