Search Unlabeled Messages on Gmail is a free Chrome add-on developed by jcs502ulf. This add-on falls under the category of Browsers, specifically Add-ons & Tools.

The main purpose of this add-on is to allow users to easily search for unlabeled messages in their Gmail account. With this add-on, users can quickly find and access emails that have not been labeled, making it easier to organize their inbox and ensure that no important messages are overlooked.

The latest version, 1.2, includes a change to the popup message over the app icon. This improvement enhances the user experience by providing clear and concise information when using the add-on.

In version 1.1, the add-on introduced the ability to not only set the operator for the search but also execute the search. This added functionality further enhances the user's ability to find and manage unlabeled messages in Gmail.

Overall, Search Unlabeled Messages on Gmail is a valuable tool for Gmail users who want to efficiently organize their inbox and ensure that no important messages are missed.