Operational accounts
Separate accounts whose keys are generated and encrypted in this browser. They are not derived from your wallet, and PrivateOps' servers are never told they exist.
Opening local storage
What a local account is, and is not
A local account is an ordinary address whose key stays in this browser. It pays its own gas, so it has to be funded before it can send, and that funding is as public as every other transfer. It keeps a key away from your main wallet. It does not hide anything onchain.