test-suite/firebase/storage.rules

rules_version = '2';
service firebase.storage {
  match /b/{bucket}/o {
    match /users/{userId}/{allPaths=**} {
      allow read: if request.auth.uid == userId;
      allow write: if request.auth.uid == userId && request.resource.size < 10 * 1024;
      allow delete: if request.auth.uid == userId;
    }
    match /public/{allPaths=**} {
      allow read: if true;
      allow write: if request.auth.token.admin;
    }
  }
}