The Livestreamer support is gone until I can get it working again. The old implementation heavily relied on low-level parts of Add-on SDK that may or may not be possible using WebExtensions. But I will try my best to get it working again, because it was also one of my favorite features.

I'm going to try to add backwards compatibility with old stored favorites. I apologize for them being gone in the meantime.

I plan on adding back most of the old features. I updated the add-on not as an "upgrade" but rather to save it from the removal of legacy add-on support that is happening very soon. And thanks for the UI feedback!