Firebase Admin .NET SDK Release Notes

To review release notes for the Firebase console and for other Firebase platforms and related SDKs, refer to the Firebase Release Notes.

Version 3.6.0 - 8 July 2026

Cloud Messaging

  • Deprecated the Token property in Message class and the Tokens property in MulticastMessage class. Use the new Fid and Fids properties instead.
  • Added support for sending messages to Firebase installation IDs (FIDs) using the new Fid property in Message class and Fids property in MulticastMessage class.
  • Updated the SendEachForMulticastAsync() API to support both Tokens and Fids targets.

Version 3.5.0 - 19 March 2026

Cloud Messaging

  • Added support for BandwidthConstrainedOk and RestrictedSatelliteOk fields in FCM AndroidConfig.

Version 3.4.0 - 08 September, 2025

  • Deprecated support for .NET 6.0 and 7.0. Use .NET 8.0 or higher when deploying the Admin SDK.

Authentication

  • Updated ActionCodeSettings to support LinkDomain, allowing you to customize the Firebase Hosting domain used in email action flows. As part of this change, DynamicLinkDomain has been deprecated.

  • Fixed an issue where Auth error codes were not correctly mapped to their corresponding FirebaseAuthException.

Version 3.3.0 - 09 July, 2025

Cloud Messaging

  • Added support for LiveActivityToken field in FCM ApnsConfig. Thanks kanclalg for the contribution.

Version 3.2.0 - 24 April, 2025

Cloud Messaging

  • Added support for proxy field in FCM AndroidNotification.

  • Fixed an issue that caused AndroidConfig.Priority to be mapped to the incorrect level when set to normal. Thanks zSlicker for the contribution.

Version 3.1.0 - 07 November, 2024

Cloud Messaging

Version 3.0.1 - 12 September, 2024

Cloud Messaging

  • Fixed an issue that caused EventTimestamp in Android Notifications to generate an invalid value. Thanks martinwiboe for the contribution.

Version 3.0.0 - 08 May, 2024

  • Dropped support for .NET Framework 4.6.1. You must now use .NET Framework 4.6.2+ or .NET 6.0+.

Version 2.4.1 - 04 April, 2024

  • Marked deprecated FCM batch send APIs with Obsolete tags.

  • Deprecated support for .NET Framework 4.6.1. The next major version of the Admin SDK will terminate support for this framework. You should upgrade your runtime frameworks accordingly.

Version 2.4.0 - 12 July, 2023

Cloud Messaging

  • Added SendEachAsync() and SendEachForMulticastAsync() APIs.
  • SendAllAsync() and SendMulticastAsync() APIs are now deprecated. Use SendEachAsync() and SendEachForMulticastAsync() APIs instead.

Version 2.3.0 - 24 March, 2022

Cloud Messaging

  • Added a series of new parameters to the AndroidNotification class that allow further customization of notifications that target Android devices. Thanks levimatheri for the contribution.

Version 2.2.0 - 17 June, 2021

Authentication

  • Added the missing EMAIL_NOT_FOUND error code.
  • Added support for using the authorization code flow with OpenID Connect (OIDC) providers.

Version 2.1.0 - 14 April, 2021

Authentication

  • FirebaseAuth and TenantManager APIs now support running against Firebase emulator suite. Enable the emulator mode by setting the FIREBASE_AUTH_EMULATOR_HOST environment variable to point to the emulator Auth endpoint. Thanks floppydisken for the contribution.

Version 2.0.0 - 04 November, 2020