Mozilla Web Apps

Marco Castelluccio

This plugin uses the <a href="https://www.w3.org/TR/push-api/" rel="nofollow ugc">W3C Push API</a> to allow you to send push notifications to anyone who visits your site and signs up for notifications.
Once you’ve installed and configured this plugin, anyone visiting your site/app in <a href="http://caniuse.com/#feat=push-api" rel="nofollow ugc">browsers that support the W3C Push API</a> (Firefox and Chrome, at the time of writing) will be asked whether they want to receive notifications from your site. You will immediately be able to send push notifications to anyone who consents.
Configure the plugin in the Settings > Web Push section of your WordPress installation. Here you can set various pieces of configuration, including:
<ul>
<li>The title for push notifications that appear from your site</li>
<li>When to attempt to register your visitor for push notifications (e.g. after how many visits)</li>
<li>Which types of events should trigger push notifications (e.g. new posts, comments, updates to posts)</li>
</ul>
N.B.: This plugin requires your website to be served via HTTPS. Indeed, for security reasons, browsers enforce the HTTPS policy for the Push API and for Service Workers.

Web Push

Send push notifications to your visitors! Uses the W3C Push API.

Sjehutch

Browser Push Notifications By Passbeemedia – Send Push notifications to the browser We have built a one stop shop for sending push notifications to the browser .
Push Plugin Features:
<ul>
<li>Safari Web Push – Take advantage of web push (Desktop Push Notifications) on OS X Mavericks.</li>
<li>Detailed Analytics – Detailed Charts Built into your wordpress plugin</li>
<li>Send A Manual Post – Send Notifications to all your users manually </li>
<li>Schedule – Your Posts only get pushed when they are published </li>
</ul>
Its all FREE …

Passbeemedia Web Push Notification

Browser Push Notifications By Passbeemedia - Send Push notifications to the browser

Web Push vs Passbeemedia Web Push Notification