Tab singlefi3r is a Chrome extension developed by Code Alliance. It falls under the category of Browsers and is classified as an Add-ons & Tools program. This free extension aims to simplify your browsing experience by automatically closing duplicate and multiple tabs that contain identical URLs.

The extension offers both manual and automatic modes for closing duplicate tabs. In the manual mode, you can use a button to close duplicate tabs at your convenience. On the other hand, the automatic mode tracks newly opened tabs and closes older tabs that have the same URL. This feature ensures that you don't end up with multiple tabs of the same website cluttering your browser window.

To provide more control over the closing behavior, Tab singlefi3r allows you to create an exclude and include list for domains. This means you can specify certain websites that should be excluded from the automatic closing process, or include websites that you want to be considered for closure.

With its ability to efficiently manage duplicate tabs, Tab singlefi3r offers a convenient solution for keeping your browsing experience organized and clutter-free.