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.

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.