Concept:Application software is a program designed to help users perform specific tasks.
Explanation:Firefox is a web browser, not an operating system.
As a browser, it does not manage hardware or run the computer system.
Therefore, it cannot be classified as system software.
It is a user-oriented program used for browsing the internet.
This places it in the category of application software.
Application packages and tools are broader terms, but the direct classification is application software.
Answer:C. Application software.