I've just sampled some mirror sites. - https://mozilla-firefox.fileplanet.com/ https://mozilla-firefox.fileplanet.com/ - Indeed it downloads a download manager

I've just sampled some mirror sites. - https://mozilla-firefox.fileplanet.com/ https://mozilla-firefox.fileplanet.com/ - Indeed it downloads a download manager. - https://download.cnet.com/Mozilla-Firefox/3000-2356_4-10208565.html https://download.cnet.com/Mozilla-Firefox/3000-2356_4-102085... - Downloads an installer. It's for an older version but shouldn't have the unique ID, and it should be able to update itself but I haven't tested. - https://techviral.net/firefox-offline-installer/ https://techviral.net/firefox-offline-installer/ - Also the installer, and for the latest version. That's 2 out of 3 without an unique ID. You have also conveniently glossed over the package manager angle, which I suspect is a pretty large slice of their user base.