I tried the steps again and was able to see all styling. Perhaps you could check if your npm is up to date and other settings are correct. Also, you can you Chrome Developer tool to check if there’s any errors behind the scene.
@Martin no problem for me so far with vuefire but my app is far from complete. It’s true that, just like with any other nosql database, relations are painful.
I really enjoy the Firebase authentication system, although it was bit tricky to implement a complete solution with usernames. Unfortunately they don’t care about i18n (english only password reset page etc.). The free hosting is something to mention too.
Just like you I had a look at gun.js in 2016, and keeping an eye on it