Firefox 44 debuts push notifications

Mozilla today released Firefox 44, following in rival Chrome's footsteps by adding push notifications to the browser.
Tuesday's update to version 44 lets users opt in to receive notifications from websites even when a site's tab has been closed or never opened.
Google added the same functionality to Chrome in April with version 42.
Both Chrome and Firefox rely on the W3C's (Worldwide Web Consortium) under-construction "web push" protocol, and the associated Push API (application programming int