Nagendran Muthuraman contributed to the WebPlatformForEmbedded/WPEWebKit project by addressing a CSS compatibility issue in the WebInspectorUI. He updated the codebase to replace the deprecated :matches() pseudo-class with the modern :is() selector, ensuring the user interface remained stable and accessible when accessed over HTTP. This change improved cross-browser consistency and reduced the risk of UI regressions, particularly in environments where :matches() is no longer supported. Working primarily with JavaScript and CSS selectors, Nagendran focused on front-end development and web inspection tools, demonstrating a targeted approach to maintaining modern standards and preventing potential breakage in the Web Inspector UI.