Extension Manager is a free Chrome add-on developed by jgrass. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This program provides a simple and intuitive way to manage your Chrome extensions.

With Extension Manager, you can easily configure rules to automatically open or close your extensions. This feature allows you to customize your browsing experience by controlling which extensions are active based on specific conditions. Whether you want certain extensions to automatically open when visiting certain websites or close when performing certain actions, Extension Manager makes it easy to set up these rules.

The program is currently being continuously optimized by the developer, jgrass, and they welcome feedback from users. This shows a commitment to improving the software based on user input. If you're looking for a convenient tool to manage your Chrome extensions and customize your browsing experience, Extension Manager is worth checking out.