title: Angular interceptor with AngularFire
body: <p>Does anyone know is it possible to intercept the requests made to firebase cloudstore with AngularFire library ?</p>
  
  <p>I would like to implement a functionality that shows a toast message in the angular interceptor when adding/updating/deleting items from the cloudstore</p>
  
  <p>I am using AngularFire library and AngularFirestore.</p>
  
  <p>My interceptor works fine for other http requests but not when when using the library only using the angular builtin HttpClient library. I can see in the network console that xhr request are made when adding/updating/deleting items from cloudfirestore.</p>
  
  <p>How can I intercept the requests made from AngularFirestore library ?</p>
  
  <p>I am using 
  @angular/fire 5.1.2
  and angular 7.2</p>
  
  <p>Thanks,
  Jani</p>