I'd like to be able to quickly erase all content and settings stored by the browser.
The button would be under Orion in the menu bar, and be called "Erase All Content and Settings", in keeping with the verbiage on iOS and macOS. A popup would confirm that you want to erase everything totally. Perhaps a password would be required, but maybe just one additional click.
The next time Orion is opened, it should think that it is the very first time it has been opened by that user, and there should be zero trace (within the context of the application itself) of it having been used before.