With Filestar you get 0 different skills for working productively with eXtensible ARchive (.xar) files.
About .Xar
Name
eXtensible ARchive
Extension
.xar
Format
Binary
Category
Other
Developer
Apple and the OpenDarwin project
Description
An eXtensible ARchive: the checksummed, possibly compressed container macOS uses for installer packages (.pkg), XIP archives and Safari extensions; a table of contents in XML lists the files it holds.