Marimo Auto Grouper is a free Chrome extension designed for developers managing multiple localhost servers. It automatically organizes your browser tabs into distinct green groups, providing instant visual separation between local development environments and other web pages. This functionality helps to reduce clutter and enhances navigation, particularly for those working on various projects simultaneously. The grouping is entirely automatic, eliminating the need for manual tab management and allowing developers to focus on their tasks more efficiently.

The extension is particularly beneficial for users who frequently switch between different ports for frontend, backend, and API development. With Marimo Auto Grouper, each localhost root is assigned its own group, promoting a cleaner workflow. This organization not only makes it easier to identify which tabs are related to local development but also keeps production sites and documentation separate. Overall, this tool enhances productivity and organization for developers dealing with multiple projects.