1. Data stored in the browser
API keys can be kept only in chrome.storage.session or persisted in chrome.storage.local, depending on your choice. Provider settings, quick actions, interface preferences, and imported Skills are stored in chrome.storage.local. Page snapshots, edited source text, page-scoped conversations, model selections, and context state are stored in local IndexedDB, with local storage as a possible fallback.
This data is not synced to a TabTell server. TabTell does not add application-level encryption, so the protections of the browser profile, operating-system account, and device still matter.
Configuration backups contain provider and model selections, quick actions, Skills, and interface preferences. They do not contain API keys, webpage text, or conversations. Custom provider names and endpoints, quick-action prompts, Skill instructions, and readable text resources are included and may contain sensitive information. Review a backup before sharing or storing it.