Close Other Tabs
Add "Close Other Tabs" function, lost since Chrome78. (Firefox version)
What is Close Other Tabs?
Close Other Tabs is a Firefox add-on that allows you to easily close all tabs except for the current one and also close all tabs and windows with a single click. Improve your tab management and productivity with this convenient feature.
Add "Close other tabs" button and "Close other tabs and windows" context menu.
Close Other Tabs may not be safe to use and it requires some risky permissions. Exercise caution when installing this add-on. Review carefully before installing.
Close Other Tabs has earned a fairly good reputation and likely can be trusted.