The Firefox Marketplace has apps designed for your Firefox OS device. We'll show you how to find and install them.
Learn how to create a new email message from the contacts application in Firefox OS
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.
The dual SIM features on Firefox OS let you hold two phone numbers in one device. This article shows you how to manage two SIM cards on your Firefox OS phone.