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Authentication features; Cloud Messaging updates and deprecations

v4.21.0

July 8, 2026Release NotesView original ↗
2 features1 enhancementThis release2 featuresNew capabilities1 enhancementImprovements to existing featuresAI-tallied from the release notes

Firebase Admin Go SDK v4.21.0 is now available. This release includes new features and deprecations in the Cloud Messaging API and new features in Authentication. For installation instructions, see Add the Firebase Admin SDK to your server.

Fetched July 10, 2026