浏览器在请求和客户端之间发送推送通知时使用什么推送服务？
What push service do browsers use when sending push notifications between the request and the client?
当使用服务工作者从 Edge 浏览器向用户设备发送推送通知时，Edge 是否使用 Azure 服务作为推送服务将消息有效负载中继到客户端？
我对在封闭环境中使用推送通知很感兴趣，但对我可能需要注意的安全问题感到困惑。
根据您提供的文档，它说
Each browser can use any push service they want, it's something developers have no control over. This isn't a problem because every push service expects the same API call. Meaning you don't have to care who the push service is. You just need to make sure that your API call is valid.
所以我认为你不需要关心浏览器使用的推送服务，也不需要担心安全问题。
但是回答你的问题：对于Edge使用的推送服务，我认为是Windows Push Notification Service (WNS). For other browsers, you can also refer to this article。
当使用服务工作者从 Edge 浏览器向用户设备发送推送通知时，Edge 是否使用 Azure 服务作为推送服务将消息有效负载中继到客户端？
我对在封闭环境中使用推送通知很感兴趣，但对我可能需要注意的安全问题感到困惑。
根据您提供的文档，它说
Each browser can use any push service they want, it's something developers have no control over. This isn't a problem because every push service expects the same API call. Meaning you don't have to care who the push service is. You just need to make sure that your API call is valid.
所以我认为你不需要关心浏览器使用的推送服务，也不需要担心安全问题。
但是回答你的问题：对于Edge使用的推送服务，我认为是Windows Push Notification Service (WNS). For other browsers, you can also refer to this article。