I moved from Safari to Firefox because if you're not using iCloud Keychain, the passwords Safari saves are not backed up properly with Time Machine: https://news.ycombinator.com/item?id=24626562
So I hope that, unlike Safari, Orion uses the Login rather than the Local Items keychain.
If Apple wants to tell everyone that they have to use iCloud Keychain for their Time Machine backups to work, they can do that, but Time Machine backups shouldn't silently not work, only to be discovered when you've lost your data.
So I hope that, unlike Safari, Orion uses the Login rather than the Local Items keychain.