Responsive Sidebar for Reddit is a Chrome extension developed by Daniel McKnight. This free add-on falls under the category of Browsers and specifically the subcategory of Add-ons & Tools.

The main purpose of this extension is to hide Reddit's right sidebar when the window size is less than 768px. This feature ensures that the content on the website is displayed in a responsive manner, optimizing the user experience on smaller screens.

In addition to the automatic hiding of the sidebar, users also have the option to manually toggle the sidebar visibility using the "Show Sidebar" link. Furthermore, there is a "Lock Sidebar" toggle that allows users to lock the sidebar in place if they prefer to keep it visible at all times.

It is worth mentioning that the left sidebar, known as the listing-chooser, is closed when the user is not on the Front Page. This helps to keep the interface clean and focused on the content being viewed.

Overall, Responsive Sidebar for Reddit is a useful Chrome extension that enhances the browsing experience on Reddit by providing responsive sidebar functionality.