diff --git a/lib/firebase.js b/lib/firebase.js
index 810957d6..85e02e77 100644
--- a/lib/firebase.js
+++ b/lib/firebase.js
@@ -63,6 +63,8 @@ class FirebaseCore {
     const _name = (name || INTERNALS.STRINGS.DEFAULT_APP_NAME).toUpperCase();
 
     // return an existing app if found
+    // todo flag as deprecated - no longer need to initialize native apps
+    // todo in v4 remove deprecation and throw an error
     if (INTERNALS.APPS[_name]) return INTERNALS.APPS[_name];
 
     // only validate if app doesn't already exist
diff --git a/lib/modules/database/reference.js b/lib/modules/database/reference.js
index 7a95aa46..3fcc3599 100644
--- a/lib/modules/database/reference.js
+++ b/lib/modules/database/reference.js
@@ -415,6 +415,7 @@ export default class Reference extends ReferenceBase {
     return this.path;
   }
 
+  // TODO should check query modifiers and if same app instance
   /**
    * Returns whether another Reference represent the same location and are from the
    * same instance of firebase.app.App - multiple firebase apps not currently supported.