Probably the best notifier there is, but it's currently broken and doesn't automatically update who's streaming. I also haven't been getting the popups for about a year now.

Edit: 6 months later, still broken.

It's unbelievable how awesome this is. I don't even have to visit Twitch any more, you can launch streams in a video player, launch chat in a separate window, launch past vods, and even set notifications for individual streamers. It's also lite on resources. Paired with Chatterino I'm loving it.

Great extension. Would be really great to have option to hide some followed channels from showing up. I have too many of them and not all of them I want to see in extension. But with hide option I will be able to make my "best of the best" channels list ^^

Edit: And this option is added now! Works like a charm. Thank you!

Works great but needs a dark theme.

I like it. Some more popular alternatives have too much in their UI for my liking, but this one is pretty much perfect and very close to Twitch Now (which no longer works, unfortunately). The only thing I could suggest is notification settings per channel.