问题
Anyone know how to send the notification to multiple Firefox devices in one POST call.
回答1:
The Web Push standard currently doesn't allow it. Take a look at this discussion for more information.
How to send a notification to multiple subscribers using web-push package of Node.js? contains a possible alternative solution (the question is more specific than this one, but you could apply the same solution).
来源：https://stackoverflow.com/questions/36133772/how-to-send-a-notification-to-multiple-firefox-devices-at-a-time