title: Firebase FCM practices (1 project vs multiple apps)
body: <p>I just updated my GCM implementation to Firebase.</p>
  
  <p>I started with creating a FCM project and added one of my apps to it.
  When I got to my second app, I created a new FCM project, but then found out I could link multiple apps to one project, so I linked the second app to my first project as well.</p>
  
  <p>Now I have all my apps linked to one project and it works well, still I wonder if this is the best (most sensible!?) way to do it.
  Because now everytime I download the "google-services.json" there is config stuff in it for ALL my linked apps, even though I don't need it in my current app (and I am not sure if I can delete the superfluous stuff (can I?)). </p>
  
  <p>Are there any other ramifications for having one project only or is it even a good thing? </p>