Privacy Policy

Last updated: July 2026

Guardián Web is a defensive extension designed around the principle of minimal data collection. Here's exactly what it does with your information.

What data it handles and where

Data	Where it lives	Does it leave your device?
Per-tab risk signals	Session memory (cleared on close)	No
Warning history, trust list, settings	Browser local storage	No
Local copy of the malware feed	Local storage	No (download only)
Data you type into forms	Only in the page's own memory	Never stored or sent

Queries to external services (optional)

Except in local mode, the extension may make these queries, all for your security:

• Community reputation (sec.fourmartech.es): while browsing, only a hash prefix of the domain is sent (k-anonymity). The server never knows which specific site you're visiting.
• Google Safe Browsing / URLhaus: only if you configure your own API keys.
• URLhaus malware feed: periodic download of a public list; it includes no data about you.

Local mode, which you can enable in the options, disables all these queries: nothing leaves your device.

Community reports

• Sent only when you manually click "Report this site." Nothing automatic.
• An anonymous, random installation identifier is used, stored hashed on the server.
• No email, account or IP address is collected.

What Guardián Web does NOT do

• Does not collect or sell browsing data.
• Does not use analytics or telemetry.
• Does not inject ads or alter content (except the warning banner).

Open source

All the code is public and auditable under the MIT license. You can verify for yourself exactly what the extension does.