Github Static Nav is a Chrome add-on developed by tonglil. This free tool falls under the Browsers category, specifically as an Add-ons & Tools subcategory. The main functionality of this add-on is to keep the tabs of a repository fixed at the top of the page while scrolling, ensuring easy navigation within a Github repository.

By pinning the new Github navigation bar to the top of the screen as you scroll down, Github Static Nav allows users to effortlessly access tabs for code, issues, pull requests, and more regardless of how far they have scrolled down the page. This feature enhances user experience by providing seamless navigation within Github repositories.