Deep Dive: How Session Isolation Actually Works

Session isolation is the foundation of persona management. At its core, it means that cookies, localStorage, IndexedDB, service workers, and all other browser state are completely separated between personas.

Persona Kit achieves this through a multi-layered approach. Each persona gets its own browser profile directory with a dedicated cookie jar, cache partition, and credential store. Network traffic is routed through persona-specific proxy chains, ensuring that even at the network level, there's no cross-contamination between identities.