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Cloud Messaging API deprecations; new Authentication features

v4.21.0

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

The Firebase Admin Go SDK (v4.21.0) is now available. This release comes with new features and deprecations in the Cloud Messaging API and new features in Authentication.

Fetched July 28, 2026