marginalia

Privacy Policy for Marginalia

Last updated: February 14, 2026

Overview

Marginalia is a browser extension designed to help users create and manage personal notes associated with specifically requested webpages, domains, or globally. We are committed to protecting your privacy. This policy details how your data is handled.

Key Point: Marginalia operates entirely offline. It does not collect, transmit, or sell your personal data. All notes are stored locally on your device.

Information We Collect

Marginalia does not collect, store, or transmit any personal identification information (PII).

How Information Is Used

The information you input (your notes) is used solely for the purpose of displaying it back to you within the extension’s interface.

Data Storage

All data generated by Marginalia is stored locally on your computer using the browser’s built-in storage capabilities (e.g., WebExtension storage.local API).

Data Sharing

We do not share, sell, or disclose your data to third parties because we do not have access to it.

Permissions Justification

Marginalia requires specific permissions to function correctly. We request only the minimum necessary permissions required by standard WebExtension APIs:

Remote Code

Marginalia does not use any remote code. All logic is contained within the extension package installed on your browser. This ensures that the functionality cannot be changed remotely without a formal update through your browser’s extension store.

User Control

You retain full ownership and control of your data.

Changes to This Policy

We may update this Privacy Policy to reflect changes in our practices or for other operational, legal, or regulatory reasons. Any changes will be posted on this page. Since the extension does not collect contact information, we encourage users to review this policy periodically.

Contact

If you have questions about this Privacy Policy, please contact:

Developer: Fabio Mereu Contact: https://github.com/medenagan/marginalia