Ah, thanks for fixing it!

The flare shows up in the editor unless you provide :sidebar-panel? true as an argument, in which case the flare will show up in that sidebar view. I will see if I can improve the Ux for this a bit.

Maybe you forgot the ? in : :sidebar-panel ?

Simple Browser is cool! Flares also have the advantage that you can open them in a side panel view. At least a singleton.