What is Firefox's Use Case for Normies/Tech Illiterate People?

Currently a university student, and somewhat frequently, I see Firefox installed on people's laptops but they also have Chrome installed and are using Chrome, or Edge, or Safari. Rarely do I see Firefox actually being used but I see it installed frequently. Does anyone have a clue as to why they have it installed?

Yea I know Chromium monopoly and open source browser and whatnot but the average Andy does not know what any of that is.