Pretty Pull Requests is a Chrome extension developed by Brent Yates. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This extension aims to enhance the code review experience on Github's pull request pages.

One of the main features of Pretty Pull Requests is the ability to collapse files. Users can simply click on the file name to collapse it, or collapse multiple files from bottom up using the added button. This feature helps to declutter the view and focus on specific files of interest.

In addition to file collapsing, Pretty Pull Requests also provides the option to collapse or expand all files at once. This can be particularly useful when dealing with large pull requests with numerous files. Furthermore, users can specify a regex pattern to selectively collapse or expand files that match the pattern.

Another noteworthy feature is the ability to collapse or expand added or removed lines. This allows users to easily navigate and review changes made within a file.

To facilitate navigation, Pretty Pull Requests offers a file tree view. Users can collapse directories or jump directly to a specific file diff. This feature provides a convenient way to navigate through the codebase and review changes efficiently.

Additionally, Pretty Pull Requests supports Github Enterprise, allowing users to set their own URL via the options menu.

Overall, Pretty Pull Requests is a valuable Chrome extension for developers who frequently engage in code reviews on Github. It offers various features to enhance the code review process and improve productivity.