Privacy Policy

Last updated: January 28, 2025

Overview

4chan Integrity ("the Extension") is designed with privacy as a core principle. All fingerprinting and shill detection processing happens locally in your browser. Your browsing data never leaves your machine except as specifically described below.

Data We Collect

Locally Stored Data (never transmitted)

• Post fingerprints: Text hashes, image hashes, writing style vectors, and timing data extracted from 4chan posts you view
• Persona clusters: Groups of posts identified as likely from the same anonymous poster
• Shill scores: Calculated scores based on repetitive behavior patterns
• User preferences: Sensitivity settings, auto-hide thresholds, blocklist entries

This data is stored in your browser's IndexedDB and chrome.storage. It is never transmitted to any server.

Data Transmitted to Our Servers

• Email address (Pro users only): If you sign in with Google to activate Pro features, your email is sent to our license validation API to verify your subscription status. We do not store your email beyond what Stripe (our payment processor) requires.
• License key (Pro users only): If you use a license key instead of Google Sign-In, the key is sent to our API for validation.

Data Fetched from External Sources

• Seed database: The Extension fetches a community-maintained JSON file from GitHub containing known shill patterns. This is data only (no executable code) and helps bootstrap detection for new users.

Data We Do NOT Collect

• We do not track which pages you visit
• We do not collect the content of posts you read or write
• We do not collect your IP address
• We do not use analytics or tracking scripts
• We do not sell or share any data with third parties

Third-Party Services

• Google Sign-In: Used for optional Pro subscription authentication. Subject to Google's Privacy Policy.
• Stripe: Used for Pro subscription payments. Subject to Stripe's Privacy Policy.
• Cloudflare: Our license validation API runs on Cloudflare Workers. Subject to Cloudflare's Privacy Policy.

Data Retention

• Local data (fingerprints, personas) is automatically pruned after 30 days
• You can clear all data at any time using the "Clear Database" button in the Extension popup
• Uninstalling the Extension removes all locally stored data

Your Rights

You can:

• Export your data using the Export feature (Pro)
• Delete all data using the Clear Database button
• Uninstall the Extension to remove all data
• Use the Extension without signing in (free tier requires no account)

Changes to This Policy

We may update this privacy policy from time to time. Changes will be posted on this page with an updated revision date.

Contact

For privacy questions or concerns, contact us at: privacy@4chan-integrity.com

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