As we know, HTTP legacy API was deprecated on June 20, 2023, and will be removed in June 2024.
The problem is HTTP legacy API and Web Push Protocol are sharing the same endpoint:
POST https://fcm.googleapis.com/fcm/send/...
I'm worried that disabling HTTP legacy API will affect Web Push Protocol support. And I can't find the explicit statement about whether Web Push Protocol will be affected.
firebaser here
There are no currently plans to retire this endpoint for sending messages to Web Push tokens.
Google is committed to supporting the open web/standards such as Web Push.