Prime Factorizer calculates and displays the prime factors of numbers directly on web pages. It operates entirely locally with no data collection. Users can highlight a number or scan the entire page via the right-click context menu. When a number is factorized, it receives a dashed underline and a background highlight: green for primes and yellow for composite numbers. Hovering over the highlighted number reveals a tooltip with its exact prime factorization, grouping identical primes with exponents. The extension includes a preferences page where users can enable automatic full-page factorization on load.
