[davidzweig]

I use Firebase SDK with the FirebaseUI library on languagereactor.com. When users access the /login page, if the extension is detected, the signInSuccessWithAuthResult callback triggers getFirebaseSignInToken to obtain a custom token. This token is then passed to the Firebase SDK running in the extension’s background worker via messaging, where signInWithCustomToken() is called. The SDK in the background worker has an onAuthStateChanged() callback that notifies any listening tabs when the authentication state changes.

However, some users had been reporting issues related to third-party cookies and a few other minor problems. Recently, oeffectively running a 'DROP TABLE' on 400GB of Firestore data ended up costing $2,000.

I'm looking for an auth replacement. 2 million users, mostly free users. The system needs to support Google sign-in and email authentication, possible to integrate with React Native Expo, ability to issue API keys (thats probably separate). No vendor lock-in, under $500/month, happy to self-host. Any recommendations appreciated.

[CharlieDigital]

    > However, some users had been reporting issues related to third-party cookies and a few other minor problems. Recently, oeffectively running a 'DROP TABLE' on 400GB of Firestore data ended up costing $2,000

This doesn't sound like an issue with Firebase Auth per se. You can still use the auth and move your storage to some other mechanism (one friend working on another project is using Firbase Auth with Supabase backend because he couldn't get Supabase auth to work with Claude generating most of his code).

In your case, depending on the document size vs number of documents, it might have been more economical to queue the deletions so that each day, you use exactly up to the free limit (20k deletes per day) and delete it over a number of days if there were no other constraints.