Power Close од Mosab Ibrahim

A firefox addon, for the tab addict, to close all tabs with urls containing a keyword or a domain name. For example, if you have many facebook tabs open and not in order, you can just use this addon, write "facebook.com", hit enter and voila, all facebook tabs are now closed!

For "how to use" information and source code got to : https://github.com/mos3abof/firefox-power-close

The icon used for the button is made by Freepik from Flat Icon and is licensed under CC BY 3.0