I want to add a new element to the collection.
<!-- index.html -->
<login-fire-splash-screen>
<my-app-shell></my-app-shell>
</login-fire-splash-screen>
<firebase-app ... ></firebase-app>
This element will display the login-fire in fullscreen and will hide the app shell until a user is signed in.
NOTE: it does not require parameters because the settings can be read from the firebase-app element (I guess/hope).
What do you think about it❓