If you've wanted websites to push notifications whenever there's a big update, you've typically had to use a browser like Chrome or Safari. As of today, though, there's a third option: Mozilla has released Firefox 44, which brings push notifications to all desktop users. Grant a site permission and you'll get a heads-up whenever there's an important story or alert, whether or not a given site is open. It's arguably an overdue feature, but it's hard to knock having more choice.
Source: Mozilla Blog