GitHub Tweaker is a free Chrome extension developed by Viktor Kukuruza. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This extension aims to enhance the readability of the GitHub "Pull Requests" page by displaying branch sources.

For users who find it tedious to hover over each Pull Request link to find out the comparing and destination branches, GitHub Tweaker offers a convenient solution. It eliminates the need for manual hovering by displaying the branch sources directly on the Pull Requests page. This feature not only saves time but also improves the overall user experience.

In addition to displaying branch sources, GitHub Tweaker also introduces a new feature to colorize branches. This visual enhancement makes it easier to differentiate between different branches, allowing users to quickly identify and understand the branch structure.

Overall, GitHub Tweaker is a valuable Chrome extension for GitHub users who want to streamline their workflow and improve the readability of Pull Requests. With its added features of displaying branch sources and colorizing branches, it offers a more efficient and visually appealing experience.