<pre>
(obj)/dist/bin./firefox.exe mach run -metrodesktop
</pre>
To register local builds as run in the default real "immersive" (full-screen) Metro environment, first launch the desktop browserby typing:
* For debug builds: run the resulting firefox.exe on the desktop and set as the default through Options menu -<pre> Advanced -> General tab -> Make default button.* For release builds: /mach run the resulting firefox.exe on the desktop and click yes to the default settings dialog, then select 'Nightly' in the Windows 8 prompt.* Open up Control Panel -</pre> Default Programs. You should see 'Metro Firefox' in the list of applications.* Set all Metro Firefox defaults in Default Programs.
At which point you should have a Firefox tile Then press the "Relaunch in Windows 8 Touch" button in Win8 that launches the browsermenu to switch to Metro mode. See [https://support.mozilla.org/en-US/kb/how-do-i-install-windows-8-metro-style-firefox#w_step-2-launch-windows-8-metro-style-firefox this support page] for details.
Note, for debug builds, see [[Firefox/Windows_8_Integration#Logging_Assertions]].
