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I also have this problem - https://forum.unity.com/threads/how-to-reduce-app-size-for-ios-unity-firebase-55mb-862-9-mb.879655/
Stripping is on. Maybe problem related to this - https://github.com/firebase/quickstart-unity/issues/547
After adding firebase into the project app size changed from 55M to 862.9 MB. Android build of the same project is 55.6 MB. { "dependencies":...