tl;dr: starting with Firefox 145, instead of there being a shortcut to it on your desktop, it will drop a .exe file there, so that if your desktop gets copied to a new computer, it can automatically reinstall Firefox instead of just being a broken shortcut.
tl;dr: starting with Firefox 145, instead of there being a shortcut to it on your desktop, it will drop a .exe file there, so that if your desktop gets copied to a new computer, it can automatically reinstall Firefox instead of just being a broken shortcut.