Earlier quoted context omitted.
> Their usage share is a statistical error, and most of it comes from being shipped with Ubuntu. This is not true, and is easily verifiable for yourself. https://data.firefox.com/dashboard/hardware The vast majority of Firefox usage is on Windows.
I am surprised. Does that imply most GNU/Linux users go out of their way to install Chromium actually? Ubuntu and Firefox have a similar market share.
Arch pkgstats (opt-in): ~64% FF, ~41% Chromium, ~17% Chrome
https://pkgstats.archlinux.de/fun/Browsers/current
Debian popcon (opt-in): 2.2% Firefox, ~10.3% Chromium
https://qa.debian.org/popcon.php?package=firefox
https://qa.debian.org/popcon.php?package=chromium
Flathub installs: 10kk Firefox, 10kk Chrome, 1.8kk Chromium
https://flathub.org/en/apps/org.mozilla.firefox
https://flathub.org/en/apps/com.google.Chrome
https://flathub.org/en/apps/org.chromium.Chromium
snapcraft statistics isn't public, afaik.