The Firefox OS Simulator is a desktop PC tool that shows you what apps will look like on a phone that is running the Firefox OS. It is the easiest way to try out apps on Firefox OS before submitting them to the Firefox Marketplace. The Firefox OS Simulator was formerly called "r2d2b2g", but that name is too difficult.
The Simulator is packaged as a desktop Firefox add-on. You can use any recent version of Firefox, including released, Beta, Aurora, or Nightly versions.
Installing Firefox OS Simulator
- Using Firefox, go to this link: https://addons.mozilla.org/en-US/firefox/addon/firefox-os-simulator/
- Click Add to Firefox. It's a large download. Follow the prompts that appear.
Starting the Simulator
- On the Tools menu, go to Web Developer and click Firefox OS Simulator. (If you don't see the Tools menu, try pressing Alt.) The dashboard appears.
- Click the Stopped button. It changes into the Running button and Firefox OS boots up in its own window. The default size for this window is 320x480.
To stop the Simulator, click the Running button in the dashboard, or just close the Simulator window.
Note: You can also start and stop the Simulator in the Developer Toolbar command line using
firefoxos start and
Navigating in the Simulator
Imitate swipe motions in the Simulator by clicking and dragging with the mouse. The mouse scroll wheel will move a list up and down, such as in the Settings app.
To get back to the home screen, click the home button at the bottom of the Simulator, or press the Home key on your keyboard.
? Is the back key still Esc?
Click the Console check box before you start the Simulator to open an error console so you can spot errors that might occur while you're working on your app.
Web APIs in Simulator
Mozilla is working on many Web APIs to make native platform capabilities available to Open Web Apps. The Web APIs currently supported in the Simulator are:
- Contacts API
- Settings API
Installing an app in the Simulator