I have a small website (hosted on a shared Linux/PHP server) where I allow users to download my software. It comes in a form of a ZIP file that people can download. I just noticed today after having updated that download package (or .ZIP file) that when I try to download it myself with a Firefox web browser v.62.0.3, it fetches the old version, which I no longer have on my server. I also noticed that Chrome doesn't do it and fetches the latest version.
Why is Firefox doing it and what shall I do (on my server's end) to prevent it from caching it like that?