Tab Groups Simple Controller is a free Chrome extension developed by no.web.developer. This handy tool is designed to simplify the management of tab groups in the Chrome browser. With the ability to automatically collapse or expand tab groups on browser startup, as well as the option to collapse or expand all groups with just a click, this extension offers a convenient way to organize and navigate through your tabs.

The usage of Tab Groups Simple Controller is straightforward. Simply click on the extension icon to collapse or expand all tab groups. Additionally, you can customize the actions at browser startup through the extension's context menu.