Install libnspr4 by entering the following commands in the terminal:
sudo apt update sudo apt install libnspr4
Description:
NetScape Portable Runtime Library
This library provides platform independent non-GUI operating system facilities including: * threads, * thread synchronisation, * normal file I/O and network I/O, * interval timing and calendar time, * basic memory management (malloc and free), * shared library linking.
Homepage: http://www.mozilla.org/projects/nspr/
Version: 2:4.18-1ubuntu1
Section: libs