A couple of somewhat terse guides to using the web component and webviewer to manipulate firebase realtime database, manage authenticated users, and use firebase storage. I have also linked in a previous guide I did for securing firebase rules, which also had a few other bits and pieces for getting tag lists and data changed. Happy to answer questions etc.
The first two make no use of the built in Firebase component or any Firebase extensions
Firebase Authentication with Web component and HTML
Firebase Storage with Web Component
and also