Privacy Policy

Last updated: 9 May 2026

This page explains what data Notebook for ChatGPT (the “extension”) collects, why, where it lives, and what your choices are. The short version: your highlights, notes, prompts, tags, and bookmarks stay on your own device. We collect a small amount of anonymous usage information so we can improve the product.

What stays on your device

Everything you create using the extension is stored locally in your browser’s extension storage and never leaves your machine. That includes:

• Highlights, in‑line notes, and follow‑up questions you save
• Saved prompts in your prompt library
• Conversation tags and message bookmarks
• Message edits you make in place
• Backup files generated by Export → Backup → Export

We do not transmit, mirror, or store any of this data on a server. Uninstalling the extension removes it; reinstalling starts fresh unless you imported a previously saved backup file yourself.

What we send to our analytics provider

We use PostHog to understand how the extension is used. The extension sends anonymous events such as “an export was started” or “a highlight was saved.” Each event includes:

• A user identifier — the email of your Chrome profile if you are signed into Chrome, otherwise a randomly generated identifier kept on your device. This is used so the same person across reinstalls or devices counts as one user instead of many.
• The extension version and the name of the event being recorded.
• Properties tied to the event itself, such as the highlight color you picked or the export format you chose.

We do not send the contents of your ChatGPT conversations, your highlights, your notes, your prompts, your bookmark excerpts, or any other text from your conversations. We have also disabled IP and geographic capture in our PostHog project, so we cannot derive your location from these events.

Permissions used

• storage — saves your highlights, notes, prompts, tags, and other annotations locally.
• identity / identity.email — reads the email of your signed‑in Chrome profile so we can use it as the analytics user identifier described above.
• chatgpt.com / chat.openai.com host access — required because the extension only works on those sites; that is where your ChatGPT conversations live.
• us.i.posthog.com host access — the network endpoint that receives the anonymous analytics events described above.

Your choices

• Backup before uninstalling. Export → Backup → Export downloads a single JSON file with everything the extension has stored locally. Keep it; reimport later if you reinstall.
• Stop sharing the analytics identifier. If you sign out of your Chrome profile or switch to a guest profile, the email field is unavailable and the extension uses a random local identifier in its place.
• Remove all data. Uninstall the extension and Chrome deletes everything in its local storage automatically.

Children

The extension is not directed at children under 13 and does not knowingly collect personal information from children.

Changes to this policy

If this policy changes, the “Last updated” date at the top of the page will change with it. Material changes will be flagged in the extension’s Chrome Web Store listing.

Contact

Questions, requests, or anything that feels off: me4saurabh4u@gmail.com.