Tab Defrag is a free Chrome add-on developed by Sampson. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This lightweight extension aims to sort all tabs in the current window based on their URLs.

The main feature of Tab Defrag is its ability to organize tabs by their URLs. With just a single click, users can rearrange the tabs in their Chrome window in a more systematic and structured manner. This can be particularly useful for users who have a large number of tabs open simultaneously and need a quick way to locate specific websites.

Tab Defrag only requests one permission, which is to access the tabs in the browser. This permission is necessary for the extension to read the URL of each tab and assign it a new placement based on its URL. It does not require any additional permissions or perform any other functions.

Overall, Tab Defrag is a simple and straightforward Chrome add-on that fulfills its purpose of sorting tabs by URLs effectively. It provides a convenient solution for users who want to keep their browsing experience organized and efficient.