CssAdd is a Chrome extension developed by computerundsound, available for free in the Browsers category under Add-ons & Tools. It allows users to easily insert a CSS file from a URL into any website, and the settings are maintained even after reloading the page.

This extension is particularly useful for those who need to create a CSS file for a webpage but do not have FTP access. By simply providing the URL of the CSS file, users can inject the styles into the active page without the need for any additional tools or complicated processes.

With CssAdd, users can easily customize the appearance of any website they visit, without the need for direct access to the website's source code. The ability to maintain the CSS settings even after reloading the page ensures that the custom styles remain intact, providing a seamless browsing experience.

Overall, CssAdd by Jörg Wrase - cusp.de is a valuable tool for web developers and designers looking to quickly and easily add custom CSS styles to any webpage.