Local browser storage
The interface can store the selected light, dark, or system theme; the preferred language; saved favorite-name slugs; compare-name slugs; and small non-sensitive interface settings in localStorage.
This information normally stays in the browser. It is not silently uploaded as a profile. The compare and favorite lists contain name-page identifiers, not birth details.
Advertising and third-party tracking
This version does not load third-party advertising, analytics, social-media, or share-button JavaScript SDKs on normal pages. Social sharing occurs through ordinary links or the browser's native share feature after a visitor chooses it.
An external destination can set its own cookies once opened. Review that destination's policy for details.
Your controls
Use the browser's site-data controls to remove the session cookie and localStorage values. You can also clear saved names through the interface. A browser set to block all storage may still read public name pages but some personalization and security features may not persist.