WhatsApp isn't directly available on Firefox OS, but you can still use a WhatsApp client on your device or chat with friends using Facebook or LINE.
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.
Your device is set to automatically check for updates every day, but you can manually check at any time. We'll explain how.
You can check to see what version of the Firefox OS software you have by looking under Device Information in the Settings app.