Firebase Features
Your Stoker apps run on Google Cloud projects, which are also Firebase projects.
Firebase Auth Email Templates
You can customize the email templates used for auth actions in the Firebase Console. Settings are under Authentication > Templates.
Firebase Integrations
There are a number of services that your Firebase (Google Cloud) projects can integrate with. See "Integrations" in the "Project Settings" section of the Firebase Console.
Project Alerts
Firebase sends alerts regarding your Firebase (Google Cloud) projects. You can enable/disable these under "Alerts" in the "Project Settings" section of the Firebase Console.