Just press the power and home buttons at the same time. Your screenshot will be stored in the Gallery app.
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.
Firefox OS has a global search bar that lets you search your phone, the Web, and new, popular app categories, all in one place.
This article explains how to clear the browsing history, the cookies and stored data on the Firefox Browser on Firefox OS.