$ sudo apt-get update
$ sudo apt-get install libfm-extra4 

libfm-extra4 is installed in your system.

Make ensure the libfm-extra4 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libfm-extra4 *

You will get with libfm-extra4 package name, version, architecture and description in a table

libfm-extra4 package basic information: