Xiufeng Guo

Privacy Policy for Flagium

Privacy Policy for Flagium

Last Updated: November 2025

Overview

Flagium is a browser extension that displays server location and network information for websites you visit. We are committed to protecting your privacy and being transparent about our data practices.

Key Point: Flagium does NOT collect, store, or transmit any personal information about you.

Our Single Purpose

Flagium has one simple purpose: to show you where websites are physically hosted by displaying their server location, IP address, and network information.

What Information We Access

1. Website Server Information

When you visit a website and click the Flagium icon, we access:

  • Server IP addresses (the website's server, NOT your IP)
  • Domain names of websites you're viewing
  • HTTP protocol information (HTTP/1.1, HTTP/2, HTTP/3)
  • Response headers from the website server

2. Geographic Data

We determine the geographic location of website servers:

  • Country and city where the server is located
  • ISP/Organization operating the server
  • ASN (Autonomous System Number) of the network

Important: This is the website server's location, not your location.

How We Use Information

Local Caching

  • Server location data is cached locally in your browser for performance
  • Cache duration is configurable (default: 60 minutes)
  • Cache can be cleared anytime through extension settings
  • All cached data remains in your browser only

User Preferences

We store your settings locally:

  • Your preferred interface language
  • Cache duration preference
  • Custom action configurations
  • These settings never leave your browser

External Services

IP Geolocation API

  • We use api.ip.sb to determine server geographic locations
  • Only the website's server IP is sent to this service
  • Your personal IP address is never sent
  • No cookies or tracking are involved

WHOIS Lookups

  • Optional WHOIS lookups open r.sb in a new tab
  • This is a user-initiated action (clicking a button)
  • No automatic data transmission occurs

What We DON'T Do

❌ No Personal Data Collection

  • We don't collect your name, email, or any personal information
  • We don't track your browsing history
  • We don't create user profiles

❌ No User Tracking

  • No analytics or tracking scripts
  • No unique user identifiers
  • No cookies

❌ No Data Selling

  • We don't sell any data
  • We don't share data with third parties
  • We don't use data for advertising

❌ No Remote Code

  • All extension code runs locally
  • No external JavaScript is loaded
  • No remote code execution

Data Storage

Local Storage Only

All data is stored locally using Chrome's storage API:

  • Server location cache
  • User preferences
  • Custom actions

User Control

You have complete control over your data:

  • Clear cache anytime via settings
  • Reset all settings to defaults
  • Uninstalling the extension removes all data

Permissions Explained

Each permission is used only for the stated purpose:

Permission Purpose
webRequest Read server IP addresses from HTTP responses
activeTab Access info about the current tab you're viewing
storage Save your preferences and cache data locally
clipboardWrite Copy IP addresses when you click "Copy IP"
scripting Detect HTTP protocol version (HTTP/2, HTTP/3)
<all_urls> Work on any website you choose to check

Updates to This Policy

We may update this privacy policy to reflect changes to our practices or for legal reasons. Updates will be posted on this page with a revised "Last Updated" date.

Open Source

Flagium is open source. You can review our code at:

https://git.m.ac/showfom/flagium

Contact

If you have questions about this privacy policy or Flagium's data practices:

Summary

✅ Your privacy is protected:

  • All data stays in your browser
  • We only look at server information, not user information
  • You have full control over all stored data
  • No tracking, profiling, or data collection

Flagium - See where websites are hosted, not where you are.