Canary Trap

A browser extension that suggests a unique, trackable email alias for every site you sign up on — using Gmail-style plus-addressing (yourname+sitename@gmail.com) — so that if spam starts showing up, you know exactly which company leaked or sold your address. Every fill is logged locally with the site, alias, first-seen date, use count, and last-used date, viewable in the popup with CSV export. Supports Chrome, Firefox, and Safari via Manifest V3.