> Even if Chrome had push notification on iOS I can't think of any logical reason to build a push notification inside Chrome if I were Facebook Facebook has al

> Even if Chrome had push notification on iOS I can't think of any logical reason to build a push notification inside Chrome if I were Facebook Facebook has already implemented this. It is in use today on mobile web. If Safari on iOS (which powers "Chrome" on iOS) is updated to support the Push API tomorrow it will start working. Facebook has already implemented it. As for the rest we're not even talking about web at all. Back to your original post: > The web (html documents fetched via http requests) were not built with mobile devices in mind, especially websockets. In the mobile era, all messaging is based on push notifications which must go through the device vendor (APNS or GCM), and trying to support the legacy tech in this landscape is just not worth it. "Legacy tech" isn't necessary to support push notifications on web. Yes, Safari on iOS is woefully outdated for now (which again is what powers "Chrome" on iOS). But it is currently supported on Android (across multiple browsers), soon Windows, and it's possible Safari on iOS will add support in the future https://onesignal.com/blog/when-will-web-push-be-supported-in-ios/ https://onesignal.com/blog/when-will-web-push-be-supported-i... Facebook is already using this today.