Web Push Interoperability Wins  | Blog  | Chrome for DevelopersWhen Chrome first supported the Web Push API, it relied on the Firebase Cloud Messaging (FCM),formerly known as Google Cloud Messaging (GCM), push service. This required using it's proprietary API. This allowed the Chrome to make the Web Push API available to developers at a time when the Web Push Protocol spec was still being written and later provided authentication (meaning the message sender i
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