Privacy Policy — DOM Structure Visualizer

Summary

        🔒 DOM Structure Visualizer does not collect, store, transmit, or share any personal data or browsing information.
      

This extension is designed with privacy as a core principle. It operates entirely on your local machine and never communicates with any external servers.

Data Collection

We collect absolutely no data. Specifically:

No personal information — We do not collect names, email addresses, or any identifying information.
No browsing data — We do not track which websites you visit, what you click on, or any browsing behavior.
No analytics — We do not use any analytics services, tracking pixels, or telemetry.
No cookies — We do not set or read any cookies.
No network requests — The extension makes zero network requests. It never sends data anywhere.

How the Extension Works

DOM Structure Visualizer works entirely locally within your browser:

Content Script: When enabled, the extension injects a content script into web pages that listens for mouse events. When you hover over an element, it adds visual CSS outlines and labels to highlight the DOM structure. All processing happens in your browser — no data leaves your device.
Settings Storage: Your preferences (toggle state, color scheme, depth settings) are stored locally using Chrome's chrome.storage.local API. This data never leaves your browser and is not synced to any server.
No Background Connections: The background service worker only handles internal messaging between the popup and content scripts. It makes no network requests.

        💡 You can verify this yourself — the extension's source code is fully open source. Feel free to inspect the code to confirm that no network requests or data collection exist.
      

Permissions Explained

The extension requires the following browser permissions:

activeTab — Allows the extension to interact with the currently active tab when you activate it. This is used to inject the DOM highlighting functionality.
storage — Allows the extension to save your preferences (like color scheme, depth settings, and enabled state) locally on your device.

These are the minimum permissions required for the extension to function. We do not request any permissions beyond what is necessary.

Third-Party Services

None. This extension does not integrate with, connect to, or use any third-party services, APIs, SDKs, or libraries that collect data.

Open Source & License

DOM Structure Visualizer is free and open source software, released under the MIT License.

The complete source code is available on GitHub for anyone to inspect, audit, fork, or contribute to:

github.com/e8013585/dom-structure-visualizer

We believe in full transparency. If you have any concerns about privacy, you are welcome to review every line of code.

Children's Privacy

Since we do not collect any data from anyone, there is no special concern regarding children's data. The extension is safe for users of all ages.

Changes to This Policy

If we ever update this privacy policy, we will update the "Last updated" date at the top of this page. Since we do not collect any data, it is unlikely that significant changes will be needed.

Any changes to this policy will be reflected in the extension's repository.

Contact

If you have any questions or concerns about this privacy policy, please open an issue on our GitHub repository:

GitHub Issues