Try one of these articles:
- How do I check for Firefox OS updates and install them? Your device is set to automatically check for updates every day, but you can manually check at any time. We'll explain how.
- How to set up and use Firefox Accounts to access Mozilla Services Firefox Accounts is a safe and easy way to access Mozilla Services on all your devices. Learn how to create an account and access services by signing in.
- How do I find what version of Firefox OS I have? You can check to see what version of the Firefox OS software you have by looking under Device Information in the Settings app.
- Change The Default Language on Firefox OS This article describes how to change the language on Firefox OS.