Legal

Privacy Policy

Last updated: March 2026 · Effective immediately

1. Who we are

Data Mirror (datamirror.eu) is a browser extension and website created to help users understand where their data goes when they browse the web. The extension is developed independently and is not affiliated with any advertising network or data broker.

2. What data we collect

We collect no data whatsoever.

The Data Mirror extension operates entirely on your device. Specifically:

• All network request analysis happens locally in your browser's service worker
• Your browsing history, visited URLs, and detected trackers are stored only in your browser's local storage (chrome.storage.local)
• No data is transmitted to any external server controlled by Data Mirror
• We have no backend, no database, no analytics, no telemetry
• We never see your browsing data — it never leaves your device

3. Third-party services used by the extension

The extension makes a single type of external request: geographic lookups via ip-api.com (HTTPS) for domains not already in our local database. This request contains only a domain name (e.g. example.com) — never any personal information, your IP address, or browsing context.

Over 95% of domains are resolved locally without any external call. ip-api.com is a fallback for unknown domains only.

4. Data stored on your device

The extension stores the following data locally on your device only:

• Domain history — the last 30 sites you visited, with their privacy scores and detected trackers. Automatically deleted after 30 days.
• Session data — aggregated stats per day (number of requests, trackers, score range). No URLs or personal data.
• UI preferences — your preferred block order in the extension popup (stored in localStorage).

You can delete all locally stored data at any time from the Export tab → "Clear all local history".

5. This website (datamirror.eu)

This website is hosted on Cloudflare Pages (United States). Cloudflare may collect standard server logs (IP addresses, request timestamps) as part of their infrastructure. Please refer to Cloudflare's privacy policy for details.

We do not use any analytics, tracking pixels, or advertising on this website. No cookies are set by datamirror.eu.

6. Contact

Questions about this privacy policy? Contact us at hello@datamirror.eu.

7. Changes to this policy

If we ever update this policy, the new version will be posted on this page with an updated date. Given the nature of the extension (zero data collection), significant changes are unlikely.