I use Firebase with Cloud Functions for form handling and other data related tasks (like caching API calls). I'm loving the integration between the two.

Firebase looks really neat but it’s a shame you can’t modify the strict-transport-security header.

I have a preloaded domain that would no longer be eligible (Chrome would keep it around for now, Firefox and their list consumers would prune my entry) for the HSTS Preload list if I were to use Firebase due to lack of ability to include the includesubdomains and preload tokens. :/