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How to avoid "zombie" Firebase anonymous users when linking Sign in with Apple?
I was wondering what would be a solid flow to prevent multiple Firebase anonymous users from being created on a single device.
We currently use the following API to create an anonymous user:
Auth.auth(...
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0
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69
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Flutter iOS Build Error: 'openssl_grpc/boringssl_prefix_symbols.h' file not found
I am trying to run my Flutter application on an iOS Simulator, but the build fails during the Xcode build phase. The error seems related to the BoringSSL-GRPC dependency used by Firebase.
Lexical or ...
-1
votes
1
answer
51
views
Logging numbers preceding with zeros like 00123456789 as string loses zeros
Trying to save numbers(00123456789) as string to firebase from web browsers and service, but it appears without zeros in firebase console.
But when we save the same data from native mobile apps it ...
Advice
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3
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60
views
SignInWithPassword has exceeded quota limits
I was developing an Android app using Firebase, but I end up with an error message that says:
2025年12月28日 10:26:29.681 10326-10326 MainActivity com.tritongames.shoppingwishlist D Sign ...
3
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0
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73
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Cloud Run POST request fails with CORS preflight 405 (FastAPI backend)
I have a FastAPI backend deployed on Google Cloud Run and a Vite + React frontend. I am calling a POST endpoint /rag from the frontend.
The first problem is that Swagger UI in FastAPI is showing an ...
1
vote
1
answer
76
views
Flutter iOS: Persistent "Undefined Symbol" Linker Error with Firebase Analytics
I am facing a persistent and seemingly unsolvable linker error when building my Flutter app for the iOS simulator on an Apple Silicon (M2) Mac air. The build consistently fails with "Undefined ...
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0
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54
views
How to Debug Node.JS apps with Google Firebase Studio?
I am having hard time while trying to debug a Node.JS app with the visual interface of VS Code. Firebase studio has only the option to "Install additional debuggers..."
The option to "...
1
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0
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103
views
Firebase Analytics first_open event has update_with_analytics = 1 after iOS device reset — why?
I’m using Google Firebase Analytics on my React Native iOS app and I’m seeing an unexpected behavior with the first_open event and the update_with_analytics parameter.
According to the Firebase ...
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0
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106
views
Flutter Firebase rtdb works on Android but not on iOS (snapshot.exists = false)
I’m using Flutter + Firebase Realtime Database for a quiz battle feature.
Everything works correctly on Android, but on iOS the same read returns empty data (snapshot.exists == false) without throwing ...
1
vote
1
answer
129
views
Gradle fails to resolve Firebase dependencies with version catalog (libs.versions.toml) despite correct setup
I'm trying to set up an Android project with several Firebase libraries (Auth, Firestore, Vertex AI) using the modern Gradle version catalog (libs.versions.toml). However, Gradle is consistently ...
1
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0
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102
views
what are the keys created by firebase used for: "Key for Identity Platform reCAPTCHA integration"
Firebase automatically creates keys in google cloud recaptcha, when identity platform is picked for auth. Those keys are named: "Key for Identity Platform reCAPTCHA integration" and can be ...
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0
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113
views
Xcode 26 cannot find SPM modules
Recently, I've updated to MacOS 26.2 without knowing this would break compatibility with Xcode 16.4, so I am forced to use Xcode 26 to continue working on my project. I use SPM for dependencies. I've ...
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0
answers
69
views
GA4 BigQuery Daily Export Missing Data After Specific Date
I have a GA4 property linked to BigQuery for daily export (both iOS and Web data streams selected, "export all events" enabled, no filters).
Everything was working fine until 2025年11月23日, when the ...
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0
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102
views
ERROR FIREBASE XCODE: Support Files/gRPC-C++/gRPC-C++-dummy.m module map file
After installing modules shown below I keep getting this error, after trying to run an app in Xcode:
firebase: 11.1.0
@react-native-firebase/app: 23.7.0
@react-native-firebase/auth: 23.7.0
@react-...
1
vote
2
answers
148
views
Firestore collection -> doc -> collection returning empty list in flutter
QuerySnapshot profilesSnap = await _firestore
.collection('users')
.doc(userId)
.collection('profiles').doc("default").collection("incomeRecords")
...