Worked on the mozilla-mobile/firefox-ios repository to expand the WKWebView popup handling test suite, focusing on improving the reliability of mobile web content rendering. Used HTML and JavaScript to enrich testPopUp.html, adding comprehensive edge-case coverage for scenarios such as about:blank redirects, window feature specifications, and cross-origin iframe popup triggers. The approach centered on enhancing automated testing, enabling earlier detection of regressions in popup behavior and strengthening continuous integration feedback. Emphasized thorough testing practices and web development skills to align the test suite with project requirements, ultimately supporting more robust quality assurance for iOS web content handling in the codebase.