Additional imports required for Firebase?

[vaidap]

Thanks for the workshop today at Hoppers' IWD, it was lovely to meet you!

One thing I noticed-- for the DatabaseWebApp project, I could only get it to work if I added the following imports in step II.2:

 <script src="https://www.gstatic.com/firebasejs/7.6.0/firebase-auth.js"></script>
 <script src="https://www.gstatic.com/firebasejs/7.6.1/firebase-database.js"></script>

in addition to the basic firebase-app.js import. Don't know if that is just my setup, or if it's a general issue, so wanted to flag it up.