Experience Firefox OS on your Android device

Introducing Firefox OS 2.5 Developer Preview, an experimental app that lets you use Firefox OS on your Android device.

The Web is the platform

Firefox OS is the first truly open mobile platform built entirely on Web technologies. If you can build for the Web using HTML and CSS, you can build Firefox OS.

  • The most customization

    Make Firefox OS your own with apps and add-ons from the Firefox Marketplace, and keep all your favorite items front and centre with Pin the Web.

  • The most control

    From Do Not Track to Private Browsing with Tracking Protection, Firefox OS is designed keep you in control of your browsing activity.

Visit the Participation Hub

Want to make Firefox OS even better? Get all the resources, tools and documentation you need from the Participation Hub.

Check it out

Learn more at MDN

Want to do even more with Firefox OS? Head over to the Mozilla Developer Network to learn more about platform guides, Firefox OS add-ons and more.

Visit MDN

Ready to try Firefox OS 2.5 Developer Preview on your Android device?

Get the Android App

Want the full Firefox OS 2.5 experience? Flash your phone