Notes about the NSS file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries
, unused processes and other unfavourable system settings to identify slowdown issues.
The NSS file type is primarily associated with 'Bioware Aurora / Obsidian Electron NWN' by BioWare Corp.. Both toolsets use these filetypes as script source files to be packed into modules at export, but they can be viewed normally if either toolset has "Build Module on Save" enabled.