Where can I find comprehensive documentation?

Where can I find thorough documentation on angular/fire? I first started using angular/fire about 2 years ago. Super confusing. The articles on the web are all over the place, mixing compat with the current model, some saying stay on compat (assume they were old articles), some intermixing angular/fire with straight google firebase calls (which this library is supposed to wrap, correct?). Even this site sends the user back to the google firebase side. Because of this, as a newbie a couple of years ago, I ended up intermingling my code, sometimes using angular/fire/compat, mixing in angular/fire, and other times importing straight from firebase. I eventually "got it", but again, super confusing.

So, now I am replacing my old v6 compat with the new model, but I cannot find simple documentation. The md's on this site are minimal. Is there a place that I am just over looking that is a good source for angular/fire documentation.

Thanks!

The issue names no specific files or tests. Start by reviewing the existing AngularFire Markdown documentation and comparing its compat and current-model guidance with the Firebase documentation; done means a clear source for migrating from v6 compat and distinguishing AngularFire imports from direct Firebase calls.

Written by the indexing model from the issue text.