Enabling Dev Mode on Android

These steps presume you're using Fenix (Firefox for Android v.82+).

0. You can only set an alternate Sync or Firefox Account server if you're not already logged into Firefox Sync. If you are, you may wish to log out of Firefox Sync.
1. Open Firefox and tap the Menu icon (the three vertical dots in the lowest right hand position)
2. Select "Settings" from the displayed menu
3. Scroll to the bottom of the Settings menu and select "About Firefox"
4. Tap the Firefox Logo 5 times. (A small text balloon may appear at the bottom of the screen indicating progression to developer mode)
5. Once Developer Mode is enabled, tap the Return Arrow
6. At the top of the Settings menu, you should see "Sync Debug" which will have three new menu options: "Custom Firefox Account server", "Custom Sync server", and "Custom Push server". These may be set to the URLs for your testing servers.