Merges and validates all CSS

It extracts and merge all CSS by the current page and uses the service provided by W3C to validate the CSS. How it works: - Activate the extension on the desired browser page - The extension extracts and merge all CSS used by the current page and copies it into "Validate by direct input" of the CSS Validation Service (https://jigsaw.w3.org/css-validator/#validate_by_input). - By pressing the "Check" button, the W3C service checks that CSS style validity This way you can unify the duplicate CCS and check its compliance with W3C standards.