GitHub Extra Features is a free Chrome extension designed to improve the usability and productivity of the GitHub interface. It provides essential tools such as a one-click copy branch button, control over indent sizes, and a toggle for visible whitespace, which collectively enhance code readability and accessibility. The extension also highlights magic numbers in code, ensuring consistent visibility even with GitHub's dynamic loading, and adds convenient download buttons for files directly within the repository view.

This extension is particularly beneficial for developers and GitHub users seeking to streamline their workflow. It includes features aimed at improving accessibility, such as a dyslexia-friendly font option, alongside UI enhancements that maintain stability through GitHub's updates. By integrating these tools, users can enjoy a more efficient coding environment, making it easier to navigate and manage their projects.