GitHub UI Booster is a free Chrome extension designed to improve user productivity on GitHub and GitHub Enterprise. It offers a variety of features aimed at streamlining the workflow for developers and teams. The extension supports multiple GitHub instances and utilizes the GitHub API, ensuring secure access through a personal access token. Users can view the base branch for each pull request directly on the PRs page, filter pull requests, and get instant access to changed files and diffs with a simple hover.

Additionally, GitHub UI Booster provides refined line counts that exclude non-impactful files, highlights merge conflicts, and offers an integrated search for changed files across all open pull requests. The tool also allows for a nested display of dependent PRs, making it easier to track project hierarchies. Users can customize their experience with individually toggleable features and even integrate Jira for enhanced project management visibility.