$ sudo apt-get update
$ sudo apt-get install libsignon-extension1 

libsignon-extension1 is installed in your system.

Make ensure the libsignon-extension1 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libsignon-extension1 *

You will get with libsignon-extension1 package name, version, architecture and description in a table

libsignon-extension1 package basic information: