Source code review finds no malicious behavior. The extension is a React + SheetJS spinner app that stores wheel entries locally via chrome.storage.local with no external network calls whatsoever — the only fetch() call (line 27 of) is the standard Vite modulepreload polyfill fetching the extension's own bundled assets. All ML signals are explained by artifacts: the 46 js_fromcharcode hits originate entirely from SheetJS 0.18.5 binary codec routines (), the 6 innerHTML hits are React's internal SVG namespace handling, and the high js_exclamation count (3483) is minified boolean literals (!0,!1) from a Vite production build. No permissions or host_permissions are declared, making any background data exfiltration architecturally impossible. The bundled manifest matches the published manifest summary with no discrepancies.