Information about Push API architecture (external services used by browsers)

### MDN URL

https://developer.mozilla.org/en-US/docs/Web/API/Push_API

### What specific section or headline is this issue about?

A warning section ;-)

### What information was incorrect, unhelpful, or incomplete?

Hi
When using the Push API **we use a third-party service**, a detail that is not mentioned in the documentation.
- Firefox use the [Mozilla Push server](https://mozilla-push-service.readthedocs.io/)
- Chromium/Chrome use the [Firebase Cloud Messaging (FCM)](https://firebase.google.com/docs/cloud-messaging)
- _Apple ?_

### What did you expect to see?

I think it is important that this be mentioned in the documentation.

### Do you have any supporting links, references, or citations?

This demo page show clearly the used third-party service : https://simple-push-demo.vercel.app/

### Do you have anything more you want to share?

Thanks a lot for the fabulous MDN resource 💌
Regards & cheers

### MDN metadata

Page report details

* Folder: `en-us/web/api/push_api`
* MDN URL: https://developer.mozilla.org/en-US/docs/Web/API/Push_API
* GitHub URL: https://github.com/mdn/content/blob/main/files/en-us/web/api/push_api/index.md
* Last commit: https://github.com/mdn/content/commit/941ade970fd7ebad52af692b6ac27cfd96f94100
* Document last modified: 2025-05-28T14:25:52.000Z