The application lets you browse the games and channels, search, add favourite channels, set a default video quality, change the quality per stream and the volume.

Unfortunately, GNOME Twitchwhich means there are no notifications (but you can use Twitch Indicator for that) or any other features related using your Twitch.tv account. Comments are also not supported (both viewing and posting comments) right now.

Without the "gstreamer1.0-vaapi" package, the CPU usage was around 60-70% which is still a lot better than Flash.

However, considering that the application is only a month old, I'd say that it's already pretty good and it has already replaced the Twitch website for me.Why use GNOME Twitch? The short answer is: because, unlike the Twitch.tv website, it doesn't use Flash - and this should be enough to answer the question.Here's the long answer though: while Twitch.tv now uses HTML5 for the video controls, it still uses Flash for the video itself, which makes it very resource-heavy.For instance, watching Twitch in Firefox (fullscreen, source quality, Flash 11.2), the Flash CPU usage was about 140-150% in my test (with some extra CPU usage for Firefox itself), while using GNOME Twitch (with "gstreamer1.0-vaapi" installed, tested under Ubuntu 15.10), the CPU usage (fullscreen, source quality) was about 10-12% in my test.