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.