Better StackOverflow is a free Chrome add-on developed by Sin Jeong-hun. This add-on aims to fix some of the annoying issues experienced by users on the popular programming Q&A platform, Stack Overflow. Currently, the add-on offers a useful feature that allows users to toggle the right sidebar. By clicking the "R" button on the toolbar, users can easily remove the right sidebar, providing a wider view of the content and eliminating the need for horizontal scrolling when viewing code snippets.

Sin Jeong-hun plans to add more features in the future to address other common annoyances on Stack Overflow. With Better StackOverflow, users can expect a more streamlined and efficient browsing experience on this essential platform for developers.