Version: v0.1.0 Effective date: October 21, 2025

1) Who we are

NoteCache is a browser extension (Chrome, MV3) that helps you save and manage NotebookLM conversations locally while you browse notebooklm.google.com.

Contact: [email protected]

2) Scope of this Policy

This policy applies to the NoteCache extension and its built-in pages (Popup, Options, and the in-page ShadowRoot panel). It does not apply to third-party websites or services, including NotebookLM itself or any Google products.

3) What data we process (current release)

Local-first by design. No account. No cloud. No server.

• Conversation content (stored locally)
  • When you click Save or enable Auto-save, the extension stores on your device:
  • Conversation title, page URL, and timestamps
  • Conversation messages in text and basic HTML (for Markdown/JSON export)
  • Optional flags you set (e.g., star, tags)
• Preferences & settings (stored locally)
  • UI theme, auto-save toggle, export options, etc.
• We do not collect
  • Personally identifiable information (PII) beyond what you choose to save in your conversations
  • Analytics/telemetry, clickstreams, advertising identifiers
  • Server logs (we run no backend for this MVP)
• Exports
  • Markdown/JSON exports are written to a folder you choose on your device. These files are outside the extension's control.

4) Data sources & how processing happens

• NoteCache runs only on notebooklm.google.com.
• On user action (Save) or if Auto-save is enabled, a content script reads visible conversation elements from the page and writes them to your local browser database (IndexedDB).
• New messages are added incrementally with de-duplication using content hashing (for technical deduping only, not for identity).
• NoteCache does not run or read content on other websites.

5) Storage & retention

• Where: Your browser's local storage (IndexedDB and necessary extension storage).
• How long: Data stays only on your device until you delete, clear, or uninstall.