Try one of these articles:
- How to download and install apps on Firefox OS The Firefox Marketplace has apps designed for your Firefox OS device. We'll show you how to find and install them.
- 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.
- Use Firefox Accounts to manage your Marketplace apps Learn how to create a Firefox Account so you can access your favorite Marketplace apps on multiple devices.
- How to Uninstall an Application on Firefox OS This article describes how to uninstall an application on Firefox OS.