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Cookies and storage

Last updated 11 October 2026

This site does not use tracking, analytics or advertising cookies, and it does not load scripts from third parties. It stores a small amount of information in your browser’s local storage, only to make features work.

ItemPurposeKept until
Reading listRemembers research you saveYou remove it
ThemeRemembers light or dark modeYou change it
Diagnostic resultLets you see your last resultYou clear it
Form safeguardsLimits repeated submissions to deter spam10 minutes