ThirdNote Privacy Policy

Last updated: November 3, 2026

ThirdNote is a browser extension that lets you highlight and save text, chats, notes and screenshots into collections you can review later. This policy explains what the extension does with your data.

Everything stays on your device

All content you save with ThirdNote (highlights, saved chat messages, web clips, screenshots, notes, collection names and settings) is stored only in your browser's local storage on your own computer. ThirdNote has no servers. It does not send your data to the developer or to anyone else, and it does not use analytics, tracking, advertising or third-party services.

What the extension reads, and when

Text you select. When you select text on a page, ThirdNote shows a small toolbar. The text is saved only if you choose a colour or use the right-click menu.
Chats you choose to save. On AI chat sites, ThirdNote reads the conversation only after you press "Save chat" or "Import chat", or after you turn on the setting that saves chats automatically. New messages in a saved chat are added as they appear, until you stop saving that chat.
Screenshots. ThirdNote captures the visible part of a tab only when you ask it to (the Capture button, the right-click menu, or the keyboard shortcut). The image is stored locally.

ThirdNote does not read your passwords, form fields, browsing history or cookies.

Permissions

Access to websites: so the highlight toolbar, chat saving and screenshots work on the sites you study from.
Storage: to keep your collections in your browser.
Side panel: to show your library next to the page.
Context menus: for the right-click "Save selection" and "Capture" options.

Your control

You can delete any highlight, item, chat or collection inside the extension. You can download a full backup of your data from Settings at any time. Removing the extension deletes all of its stored data from your browser.

Changes

If this policy changes, the new version will be posted at this address with a new date.

Developer

ThirdNote is built by Fahad Mahmud.

Contact

Questions or problems: fahadmahmud2004@gmail.com, or open an issue on GitHub.