Enable Facebook Login
2.ii. Select More Options > Something Else
1. Go to Settings> Basic
2. Copy App ID, App Secret
1. Open Firebase Console
2. Go to Authentication> Sign in method> Facebook, then Press on Edit button (the pencil icon)
1. Enable Facebook
2. Paste APP ID and App secret
3. Copy the OAuth redirect URI link
Click on the Products "+" icon from the left panel and then click on Set Up button under Facebook Login card.
2. Go to PRODUCTS> Facebook Login for Gaming
3. Paste the OAuth Redirect URI
Click on the "In development" Toggle Button to turn on "Live" Settings for your Facebook App.
NOTE: Other some other OAuth providers also have similar steps.