How to configure security for a frontend application that uses Firebase as the backend?

[Pasindu-Heshan]

I'm building a frontend application with Firebase as the backend and want to ensure the application is secure. What are the best practices for configuring security, including Firebase Authentication, Firestore rules, and other Firebase services?

[pasindu-kavinda]

Here are the thoughts I have found so far.

• Define Comprehensive Security Rules: Craft detailed rules for Firestore, Realtime Database, and Firebase Storage, and test them thoroughly.
• Data Encryption: Encrypt sensitive data before storing it in Firestore or Firebase Storage.
• Regular Security Rule Reviews: Keep your security rules up-to-date with your app's changes.
• Enhanced Security with Google Key Management Service (KMS)

Firebase rule sample:

rules_version = '2';
service firebase.storage {
  match /b/{bucket}/o {
    match /{allPaths=**} {
      allow read, write: if request.auth != null;
    }
  }
}