Install libnspr4-dbg by entering the following commands in the terminal:
sudo apt update sudo apt install libnspr4-dbg
Debugging symbols for the 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. . This package provides the debugging symbols for the library.