The "GitHub: Preserve URL fragment in auth flow" is a Chrome extension designed to enhance user experience during the GitHub authentication process. When users are redirected to the authentication page, the extension ensures that any fragment identifiers in the original URL, such as "#L104", are preserved. This functionality is particularly useful for developers and users who rely on specific sections of a page.

By maintaining the URL fragment throughout the redirect, this tool helps users return to their intended location on the site without losing context. The extension is free to use and falls under the category of add-ons and tools for web browsers, making it a practical solution for those who frequently use GitHub for collaborative projects or code review.