I Built a Firefox Extension That Fills Any Form Instantly — No More Typing Test Data 🚀

FormSpackle is a Firefox extension that auto-fills any web form with realistic, randomized data in one click. It intelligently detects field types, dropdowns, date pickers, and UI component libraries like MUI and Ant Design, supporting features such as fill-empty-only mode, saved profiles, and a built-in field inspector. It runs entirely locally with no external data transmission, targeting frontend developers and QA engineers who repeatedly test form flows.