'Do we have to initialize Firebase on every .dart file in a flutter project?

I was looking at how to use Firebase in a Flutter project and I understood it a bit. I have 3 screens on my Flutter app and I need access to Firebase in all three of them.

https://youtu.be/EXp0gq9kGxI?t=901

I am following along with the above video. He initializes Firebase with a complex procedure involving future builders and I am not sure if I need to do that on all screens or just the main.dart file.



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