Last Updated: August 24, 2026

This Privacy Policy describes how the MySync browser extension ("the Extension") handles your personal information and browsing data.

MySync is an open-source, self-hosted tool designed to give you complete ownership of your data and cross browser sync facility. The core philosophy of this extension is privacy-first: the developer of this extension does not collect, store, sell, or have access to any of your personal data.


To provide its core functionality, the Extension reads and synchronizes the following data from your browser:
* Open Tabs: URLs, page titles, and favicon URLs of your currently active tabs.
* Bookmarks: Your saved bookmarks and folder structure.
* Browsing History: URLs and titles of the pages you visit (for tab lineage and history syncing).
* Device Information: A name you assign to your browser/device (e.g., "Work Laptop") to identify it in your sync network.


Your data is never sent to a central, third-party server managed by the developer.

The Extension is designed to communicate exclusively with a self-hosted MySync backend server that you (or your server administrator) configure in the Extension's settings.
* All data transmitted between the Extension and your configured server is sent directly to that server.
* You are solely responsible for securing the server where your data is hosted.
* We strongly recommend configuring your server to use HTTPS to encrypt your data in transit.

• Local Storage: The Extension stores authentication tokens (JWTs) and necessary synchronization state locally on your device using the browser's secure local storage API.
• Server Storage: The data synced by the Extension is stored on the remote database connected to your self-hosted server instance. You have full control over this database and can delete your data at any time by wiping the server's storage or revoking devices.

• No Analytics: The Extension does not include any third-party analytics, telemetry, or crash reporting tools.
• No Tracking: We do not track your browsing behavior across the web for advertising or any other purpose.
• No Data Selling: Since the developer never possesses your data, it is never sold or shared with third parties.

The Extension requests the following browser permissions solely to function as intended:
* tabs & history: To read your current tabs and browsing history for synchronization.
* bookmarks: To read and sync your bookmark tree.
* storage: To save your authentication token and server configuration locally.
* alarms & offscreen / background: To ensure sync processes can run reliably in the background without interrupting your workflow.


We may update this Privacy Policy from time to time as new features are added to the open-source project. Any changes will be reflected by updating the "Last Updated" date at the top of this document.


Because MySync is open-source and self-hosted, support and inquiries are handled via the project's public repository. If you have questions about the code or this privacy policy, please open an issue on the project's GitHub page.