With the Flutter 3 release, the platform now supports iOS, Android and web apps, as well as Windows, macOS and Linux desktop apps, all as part of Flutter’s stable release.

The Firebase Local Emulator Suite is a set of advanced tools for developers "looking to build and test apps locally using Cloud Firestore, Realtime Database, Cloud Storage, Authentication, Cloud ...

Official Flutter documentation, snippets and customer support have also merged with Firebase, so now developers can use the two together with ease.