SmartPullRequest is a free Chrome add-on developed by Hiroki Nomura. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This add-on aims to enhance the usability of the Files tab in Github PullRequest.

When dealing with a large number of files, it can be time-consuming to navigate to a specific file in the Files tab. However, with the SmartPullRequest extension, this process becomes more efficient. It provides a dedicated button that allows users to quickly access and manage files in the side menu and the Diff section.

With SmartPullRequest, users can effortlessly close or open multiple files in one go, thanks to the seamless integration between the side menu and the Diff section. This feature significantly improves productivity and streamlines the workflow for developers working with PullRequests on Github.