GitLab Diff Collapsible Sections is a Chrome extension designed to streamline the review process of merge requests (MRs) on GitLab. This tool allows users to collapse specific diff sections that have already been reviewed, providing a cleaner and more organized view of the remaining changes. Ideal for managing large MRs, this extension helps users keep track of what has been completed and what still requires attention, enhancing overall efficiency during code reviews.

Key features include the ability to collapse or expand individual diff sections, a one-click option to expand all sections, and support for hotkeys for quick navigation. Additionally, the extension ensures local persistence, meaning that collapsed sections remain that way even after a page reload. With zero configuration required, this add-on is user-friendly and ready to enhance the GitLab experience right out of the box.