The correct answer is Browser.Mozilla Firefox or simply Firefox is a free and open-source web browser developed by the Mozilla Foundation and its subsidiary, the Mozilla Corporation. Firefox uses the Gecko rendering engine to display web pages. Firefox was created in 2002 under the code name "Phoenix" by the Mozilla community members who desired a standalone browser, rather than the Mozilla Application Suite bundle.During its beta phase, Firefox proved to be popular with its testers and was praised for its speed, security, and add-ons compared to Microsoft's then-dominant Internet Explorer 6.Additional InformationInterpreterAn interpreter translates just one statement of the program at a time into machine code.An interpreter takes very less time to analyze the source code.However, the overall time to execute the process is much slower.An interpreter does not generate an intermediary code.Hence, an interpreter is highly efficient in terms of its memory.Keeps translating the program continuously till the first error is confronted.If any error is spotted, it stops working, and hence debugging becomes easy.Interpreters are used by programming languages like Ruby and Python for example.CompilerCompiler scans the entire program and translates the whole of it into machine code at once.A compiler takes a lot of time to analyze the source code.However, the overall time taken to execute the process is much faster.A compiler always generates an intermediary object code.It will need further linking.Hence more memory is needed.Compliers are used by programming languages like C and C++ for example.A compiler generates the error message only after it scans the complete program and hence debugging is relatively harder while working with a compiler.?An operating system is the most important software that runs on a computer.It manages the computer's memory and processes, as well as all of its software and hardware.It also allows you to communicate with the computer without knowing how to speak the computer's language.Without an operating system, a computer is useless.Some examples of operating systems include Apple macOS, Microsoft Windows, Google's Android OS, Linux Operating System, and Apple iOS.Software is a collection of instructions and data that tell the computer how to work.