the interesting one for me was that it had an IP, but tracked it a good couple hundred miles away. it also got my timezone wrong, and was also wrong for the supposed place it thought I was.

edit: I just checked the ip it got for me, and that was also incorrect; I'm not using a vpn.

Yeah like half of these things are required for the internet to function. The remainder seem like things that probably had good intentions but can be abused.

But using it for fingerprinting seems dubious. How many iOS users have never downloaded any extra fonts and all look the same?

The following is from https://coveryourtracks.eff.org/

To determine your system fonts, tracking sites commonly display some text in an HTML tag. Trackers then rapidly change the style for that span, rendering it in hundreds or thousands of known fonts. For each of these fonts, the site determines whether the width of the span has changed from the default width when rendered in that particular font. If it has, the tracker knows that font is installed. How is this used in your fingerprint?

The list of fonts you have installed on your machine is generally consistent and linked to a particular operating system. If you install just one font which is unusual for your particular browser, this can be a highly identifying metric.

My browser was snitching on my battery, charging, and even device orientation (to the degree).