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Firebase can be incorporated into an independent module by following these steps:

1. Create a new module within your project: From the Android Studio menu, select File > New > New Module. Choose "Android Library" as the module type.

2. Add Firebase dependencies: Open the build.gradle file for the module and add the Firebase dependencies that you need. For example, if you want to use Firebase Authentication, add the following lines:

implementation 'com.google.firebase:firebase-auth:20.0.1'

1. Initialize Firebase: In your module's code, initialize Firebase with the FirebaseApp.initializeApp() method. You can do this in your module's Application class or in a separate initialization class.

2. Use Firebase APIs: Use Firebase APIs as you would in any other part of your app. For example, if you want to authenticate a user, use the FirebaseAuth class:

FirebaseAuth auth = FirebaseAuth.getInstance();
auth.signInWithEmailAndPassword(email, password)
    .addOnCompleteListener(task -> {
        if (task.isSuccessful()) {
            FirebaseUser user = auth.getCurrentUser();
            // User is signed in
        } else {
            // Authentication failed
        }
    });

1. Test and debug: Test your module and debug any issues. Remember that you can use Firebase console to monitor your module's usage and performance.

2. Publish: Once you're ready, publish your module to a repository or package manager so that others can use it in their apps.