• BREAKING: Removes firebase list command (replacement: firebase projects:list).
• BREAKING: Removes firebase tools:migrate command.
• BREAKING: Removes firebase setup:web command (replacement: firebase apps:sdkconfig web).
• BREAKING: Increases the minimum version of firebase-admin in the Cloud Functions for Firebase emulator from 8.0.0 to 8.9.0.
• BREAKING: Increases the minimum version of firebase-functions in the Cloud Functions for Firebase emulator from 3.0.0 to 3.3.0.
• BREAKING: Removes support for top-level Firebase Hosting config in firebase.json. Firebase Hosting configuration must be under the hosting key in firebase.json.
• BREAKING: firebase serve can no longer start the Cloud Firestore or Realtime Database emulators.
• BREAKING: Unifies the Cloud Functions for Firebase emulator within firebase serve and firebase emulators:start.
• BREAKING: Removes support for separate WebChannel port in the Cloud Firestore emulator. Use the main port instead.
• BREAKING: Rejects Firebase project IDs with invalid format.
• Updates underlying logging infrastructure.
• Replaces deprecated google-auto-auth package with google-auth-library.
• Fixes file output of apps:sdkconfig.
• Replaces instances of firebaseapp.com with web.app for Firebase Hosting URLs.