Worked on the facebook/react repository to deliver a feature enabling React DevTools to function on pages with strict Content Security Policy restrictions. Addressed the limitation where chrome.devtools.inspectedWindow.eval is blocked by implementing a content script fallback, fallbackEvalContext.js, which reroutes evaluation requests when standard methods fail. This approach ensures that JavaScript evaluation remains possible in CSP-restricted or sandboxed environments, improving reliability for developers working with secure applications. The work involved close collaboration across teams and required expertise in JavaScript, Chrome API, and browser extension development. The solution reduces support issues and maintains DevTools usability in challenging security contexts.