Firebase here as well.

Why I like it:

-CLI makes it easy to use.

-Deploying to the internet is as easy as "firebase deploy"

-Comes with HTTPS for free and with zero config

-Automatmagically uses Firebase's CDN

-Can serve with your custom domain name

-Low cost (for my needs/traffic levels)

-(Mostly)Straightforward documentation/references

Pain point(s):

-Slightly fragmented documentation. This was only one instance, so I might be blowing it out of proportion. I wanted to have Clean URLs in my website, there was no mention of that capability in the Firebase docs -> "Customize hosting behavior".

    But the only instance I found this feature was from a random Firebase blog post from 2 years ago. 

    https://firebase.googleblog.com/2015/12/a-host-of improvements_61.html

-I can't view the contents of what I'm hosting from the web based (At least I tried to, and can't figure it out.)

-Deploys can be slow(30 secs -2 min), but honestly I should setup a CD pipeline and stop staring at it while it's deploying.

I originally was going to use Google Cloud Storage, but they don't support HTTPS out of the box.