Changes Coming to Component Extensions and How to Update

[BarryCarlyon]

As per

Updating your Component Extension: Twitch Client Beta

Testing the new Extension Sidebar and component Extension user experience is now available on Twitch.tv! By following the steps below, you can now develop and test your video Extension within the new video Extension UI framework. You can manage the updated component sizing fields in your dev.twitch.tv console and you may submit an updated version of your Extension at any point ahead of the July 31 full roll out of the updated experience to all users. More information about what is changing and …

Later today is the current timeline (US West Coast)