Close Other Tabs

This WebExtension (re)adds a context menu option to browser tabs to close other tabs other than the selected one that was removed in Firefox 78. Tested on Firefox 78.0.1.

Becuase Firefox only allows one menu item per exention in the root context menu, separate extensions are needed for each item.

See also: https://github.com/mkopec/close-tabs-to-the-right