Q:

PWA feature list for each browser

Where can I find list of PWA features that are supported and under development for each browser?
This will greatly help to determine if I shall develop a native app or go directly for PWA. And also know upfront what to expect in the foreseeable future in terms of browser support so that I can enhance my app with newer features.
Thanks

A:

Actually you can try 
https://whatwebcando.today/
for test your browser first

A:

Web App Manifest, and 
Service Worker API
 seem to be the key technologies to watch. Google's Progressive Web App Checklist mentions both of these technologies. 
However, other technologies such as BeforeInstallPromptEvent, or PWA installation notifications, are explicitly discouraged by Mozilla Developer Network, MDN:

Do not use it [BeforeInstallPromptEvent] on production sites facing the Web

Also, as an aside, commercial incentives for PWA's appear to exist:

The Supreme Court signaled Apple could face a revived antitrust
  lawsuit over its price control [...and 30% take] of the iPhone and
  iPad App Store. -Fortune

Google indicates that a progressive web app, PWA, is:

Progressive - Works for every user, regardless of browser choice because it's built with progressive enhancement as a core tenet.
Responsive - Fits any form factor: desktop, mobile, tablet, or whatever is next. Connectivity independent - Enhanced with service
  workers to work offline or on low-quality networks.
App-like - Feels like an app, because the app shell model separates the application functionality from application content .
Fresh - Always up-to-date thanks to the service worker update process.
Safe - Served via HTTPS to prevent snooping and to ensure content hasn't been tampered with.
Discoverable - Is identifiable as an "application" thanks to W3C manifest and service worker registration scope, allowing search
  engines to find it.
Re-engageable - Makes re-engagement easy through features like push notifications.
Installable - Allows users to add apps they find most useful to their home screen without the hassle of an app store.
Linkable - Easily share the application via URL, does not require complex installation.

