Firefox is not immediately available to be run as a Full Screen metro app, but Mozilla Firefox Nightly which is currently a test platform can be used as an alternative. The Windows version of Mozilla Nightly can not only work as a standalone desktop browser (a replica of Firefox), but it can also be run as a Full-Screen Metro App. Here’s how to use it in the Metro app mode.
Download and Use Mozilla Firefox Nightly as Metro App
- Download Mozilla Nightly (Windows Desktop version) from here
- Extract and Install it. I’ll skip the installation instructions, because they are all same as regular Firefox.
- Click on Start (at the lower left corner) or press the Windows Logo key. Type Default Programs and hit enter.
- From the Default Programs window, click/tap on ‘Set your default programs’.
- Select Nightly from the list in the left sidebar and click/tap on ‘Set this program as default’.
- The status above will change to This program has all its defaults.
- The Nightly tile in the Start screen will change from a simple tile to an advanced tile with a globe with background of stars.
- Click or Tap on this tile to run Mozilla Firefox Nightly in the Full-Screen Metro App mode.
That’s it. You can only run the browsers in Metro App mode if it is set as the default browser. So if you set Nightly as your default browser, Internet Explorer won’t open in Metro Mode and clicking on the Tile will open it in the regular desktop mode.