That feature wasn't big to my browsing style, Arc's way of nesting browser views suits me more, but Orion's Saved Window feature seemed clumsy to me and I'd filed my issue on Orion Tracker.
> Hope Arc and Orion eventually decide to go open source.
From Orion’s FAQ:
> Is Orion open-source?
> We’re working on it! We’ve begun with some of our components and intend to open more in the future.
> Forking WebKit, porting hundreds of APIs and writing a browser app from scratch has been challenging for our small team. Properly maintaining an open-source project takes time and resources we’re short on at the moment, so if you want to contribute at this time, please consider becoming active on orionfeedback.org.