Web Push Notifications can work without Web Push (bug 1343678) while the page is in the foreground. https://developers.google.com/web/fundamentals/push-notifications/
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Web Push Notifications can work without Web Push (bug 1343678) while the browser is running. https://developers.google.com/web/fundamentals/push-notifications/
Web Push Notifications can work without Web Push (bug 1343678) while the browser is running, though the usefulness is limited. https://developers.google.com/web/fundamentals/push-notifications/