JTR Labs
Privacy policy
Card Market Guard is designed to work locally in your browser. JTR Labs does not operate a server for the extension and does not receive, sell, share, or use extension data for advertising.
Data the extension handles
To identify and interrupt purchase paths, the extension processes the current URL and visible page text or controls on supported sports-card marketplaces. Chrome classifies URLs and page interactions as browsing activity or website content. This processing occurs locally on your device.
The extension also stores your settings, custom block message, hashed unlock passphrase, unlock timing, budget preference, and enabled state using Chrome's synchronized extension storage. Chrome may synchronize those settings through the Google account signed into Chrome, subject to Google's terms and privacy practices.
How data is used
- Marketplace URLs are checked to determine whether a buying path should be blocked.
- Visible page text and controls are checked to identify purchase actions and sports-card context.
- Settings and unlock state are used only to provide the guardrail features you configure.
Data sharing and retention
JTR Labs does not transmit extension data to JTR Labs or third parties. Settings remain in Chrome storage until you change them, clear extension data, or uninstall the extension. Uninstalling or clearing synchronized extension data removes the local extension settings, subject to Chrome Sync behavior.
Permissions
The extension requests storage to save settings and unlock state. It requests webNavigation and access to the specifically listed marketplace domains to recognize covered purchase pages, block purchase controls, and preserve known selling and account-management paths. It does not request access to unrelated websites.
Limited Use
Card Market Guard's use of information received from Chrome APIs is limited to providing and improving its single user-facing purpose: creating deliberate friction before sports-card marketplace purchases. The data is not used for personalized advertising, transferred for unrelated purposes, or made available for human review.
Your choices
You can change extension settings from the Options page, temporarily unlock buying through the delayed unlock flow, clear extension storage through Chrome, or uninstall the extension at any time.
Contact
Questions or privacy requests can be sent to [email protected].