GitHub Diff Navigator is a Chrome extension developed by Dean Attali that provides a convenient way to navigate through changes made to a file on GitHub. When editing a file on GitHub and previewing the changes, it can be challenging to locate and understand the modifications, especially for markdown documents. GitHub Diff Navigator solves this problem by allowing users to easily navigate through the changes in a "next/previous change" manner.

This non-intrusive extension seamlessly works with both markdown and non-markdown files. It automatically detects the file type being edited and presents a clean and intuitive UI for easy navigation. The extension is resource-efficient and only appears when viewing the preview of edits on a GitHub file. It also supports multiple open GitHub tabs, updating the displayed edits whenever the tab is switched.

GitHub Diff Navigator is a valuable tool for anyone who frequently edits markdown documents on GitHub. It streamlines the process of reviewing and understanding changes, making it easier to ensure the accuracy of edits. The extension is available for free on the Chrome Web Store, and its code is open-source on GitHub for those interested in learning more about Chrome extensions.