Checking the bug tracker, it only does something if you have Firefox Data Collection turned on in the settings. Personally, the first thing I do is turning that off on a fresh install.
considering it sends your unique ID (or download token) during installation, when you disable settings after installation, it's already too late.
it seems there's actually a way to turn it off before installation using enterprise policies, but I have not tried it as I left mozilla's firefox long ago first for waterfox and now librewolf.
