Privacy Policy — "This Website Safe to Access?"

Firefox Browser Extension
Version 1.8.0 | Last Updated: March 2026



Summary

"This Website Safe to Access?" is a privacy-focused browser extension. We do not collect, store, or transmit any personal data or browsing information. All analysis is performed entirely within your browser. Nothing ever leaves your device.



1. Who We Are

This extension ("This Website Safe to Access?") is a free Firefox browser extension built for privacy-conscious users. It is available on the Firefox Add-ons store (addons.mozilla.org).

For support or questions, contact: [support@dcalculator.net]



2. What Data This Extension Accesses

To perform its privacy analysis, the extension reads the following data locally within your browser only:

| Data Type | What Is Read | Why | Stored? | Transmitted? |
|---|---|---|---|---|
| Current tab URL | The URL of the active tab | To identify the website being analysed | ❌ No | ❌ No |
| HTTP response headers | Security headers (CSP, HSTS, X-Frame-Options, etc.) of the current page | To score the Security Headers category | In-memory only, cleared on navigation | ❌ No |
| Network request URLs | Hostnames of resources loaded by the current page | To detect third-party domains and known trackers | In-memory only, cleared on navigation | ❌ No |
| Cookies | Names and domains of cookies set by the current website | To detect tracking cookies and missing security flags | ❌ No | ❌ No |
| Browser API invocations | Whether the current page called geolocation, camera, microphone, clipboard, battery, notifications, canvas, or AudioContext APIs | To detect privacy-invasive API usage | In-memory only during the active tab session | ❌ No |



3. What Data This Extension Does NOT Collect

This extension never collects, stores, or transmits:

• ❌ Your browsing history
• ❌ The content of any web page you visit
• ❌ Any form data, passwords, or login credentials
• ❌ Your IP address or location
• ❌ Any personally identifiable information (PII)
• ❌ Device identifiers or hardware information
• ❌ Analytics, usage statistics, or telemetry of any kind
• ❌ Crash reports or error logs sent to any server
• ❌ Any data about which extensions you have installed
• ❌ Any data shared with third parties under any circumstances

4. How Data Is Handled

4.1 All Processing Is Local

Every analysis performed by this extension — tracker detection, cookie inspection, header analysis, browser API monitoring — runs entirely within your Firefox browser on your device. No data is sent to any server, cloud service, or third party at any point.

4.2 In-Memory Only

Data collected during a page analysis is held in a temporary in-memory object (tabData) within the extension's background script. This data:
- Is cleared automatically when you close the tab
- Is cleared automatically when you navigate away from the page
- Is never written to disk or to browser.storage
- Is never accessible to any website or external service

4.3 Popup Display Only

All analysis results — Privacy Score, tracker list, cookie findings, header checks — are displayed only within the extension popup which you open by clicking the extension icon. When you close the popup, the displayed data is discarded from the UI.

4.4 No Remote Connections

This extension makes zero network requests of its own. It does not contact any server. The tracker domain list (libs/trackers.json) and scoring configuration are static files bundled inside the extension package itself. They are never fetched from any remote URL.



5. Permissions Used and Why

This extension requests the following Firefox permissions:

| Permission | Purpose |
|---|---|
| activeTab | To read the URL of the tab you are currently viewing, so the extension knows which website to analyse |
| tabs | To communicate with the content script in the active tab, and to reload the tab when you click Re-scan |
| cookies | To read cookies associated with the current website to detect tracking and missing security flags |
| webRequest | To observe network requests made by the current page to detect third-party domains and known trackers |
| storage | Reserved for a future per-site score history feature — not currently used in v1.8.0 |
| <all_urls> (host permission) | Required for webRequest, cookies, and content script injection to work on any website you choose to visit |

No permission is used for any purpose beyond what is described above.



6. Third-Party Services

This extension does not use any third-party services, APIs, analytics platforms, advertising networks, or data brokers.

The tracker domain list bundled within the extension (libs/trackers.json) is a static reference file used solely to identify known tracking domains in network requests. It is not fetched from, or shared with, any external service.



7. Children's Privacy

This extension does not knowingly collect any information from children under the age of 13 (or the applicable age of digital consent in your jurisdiction). As the extension collects no personal data whatsoever, it poses no particular risk to children's privacy.



8. Changes to This Policy

If this Privacy Policy is updated in a future version of the extension, the updated policy will be published at the same URL and the "Last Updated" date at the top of this document will be revised. Continued use of the extension after any update constitutes acceptance of the revised policy.

Significant changes will also be noted in the extension's version release notes on the Firefox Add-ons store.



9. Your Rights

As this extension collects no personal data, there is nothing to access, correct, export, or delete. No data about you exists on any server or system under our control.

If you have questions or concerns about this policy, please contact us at:
[support@dcalculator.net]



10. Governing Law

This Privacy Policy is governed by and construed in accordance with applicable law. If any provision of this policy is found to be unenforceable, the remaining provisions will continue in full force and effect.



This Privacy Policy applies to the Firefox browser extension "This Website Safe to Access?" version 1.8.0 and all subsequent versions unless a revised policy is published.