Worked on stabilizing navigation history within the LadybirdBrowser/ladybird repository by addressing a session history entry replacement issue in LibWeb. Focused on fixing a bug where navigation history could become inconsistent when entries were replaced during navigation, implementing a targeted regression test to ensure correct back navigation behavior after such replacements. Utilized C++ for core development and testing, applying test-driven development practices to guard against future regressions and history corruption. This work improved the reliability of navigation for end users and demonstrated a careful, detail-oriented approach to maintaining browser internals, with a strong emphasis on code quality and commit hygiene.