$ sudo apt-get update
$ sudo apt-get install libwebkit2gtk-3.0-25 

libwebkit2gtk-3.0-25 is installed in your system.

Make ensure the libwebkit2gtk-3.0-25 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libwebkit2gtk-3.0-25 *

You will get with libwebkit2gtk-3.0-25 package name, version, architecture and description in a table

libwebkit2gtk-3.0-25 package basic information: