Last updated: July 30, 2026 · Effective date: July 30, 2026
Core principle: Browser Data Studio is a local-first browser extension. All data reading, parsing, editing, backup and snapshot operations are performed locally in your browser. We do not collect, store, or upload any website data you visit to external servers.
1. Data we process
After you actively click “Allow access” to authorize a website, the extension only reads the following local data of that website in the current browser context:
Key-value pairs of LocalStorage and SessionStorage
JWT / Token content contained in the above data (used only for local parsing and display)
This data always remains on your device and is never sent to any external server.
2. How data is used
Local display: shown in the Chrome side panel as structured tables, JSON, JWT parsed views, etc.
Local editing: after you manually unlock and confirm, the extension calls browser APIs to set/remove/clear data for that website.
Local snapshots: a pre-change snapshot is automatically saved before each modification for undo. Snapshots are stored only in the extension's local storage (chrome.storage.local).
Local export: data can be exported as a JSON file to your local disk; tokens, emails and phone numbers are automatically redacted.
3. Data retention
Operation snapshots are stored only in the extension's local storage and are not synced to the cloud.
Up to 10 snapshots per origin are kept; the oldest is automatically discarded when the limit is exceeded.
Each snapshot automatically expires and is deleted after 7 days.
4. Permissions
On installation: the extension requests only the minimum permissions (activeTab, cookies, scripting, sidePanel, storage, tabs) and does not request any website access permissions.
On use: only after you click “Allow access” will the extension request permission for the current website (optional_host_permissions).
You can revoke permissions at any time in Chrome “Extensions → Permissions”.
5. Third-party services
This extension:
does not embed any analytics, advertising or tracking SDKs;
does not load any remote JavaScript or external resources;
does not use cookies, tracking pixels or device fingerprinting;
does not send data to any third-party server.
6. Children's privacy
This extension is not directed at children under 13 and does not actively collect any personal information.
7. Policy updates
We may revise this privacy policy as features evolve. The updated policy will be posted on the extension store page and related documents with the latest effective date.
8. Contact us
If you have any questions about this privacy policy or data handling, please contact us through the extension store page or project page.