That’s actually a very poor example because the US and Europe have very different regulatory frameworks. The US actually requires more details when listing ingredients than Europea does.
In the EU you must list all ingredients in your product. Ordered by what it has the most.






Canvas is a special “place”/way of drawing images on a website. It can be used for fingerprinting since different gpus/drivers etc draw things a little differently. Basically a script on a page draws thousands of shapes, pictures whatnot on a canvas you can’t see i.e. is placed somewhere out of the standard view area. Then the script calculates some kind of hash or checksum. Combine that with other fingerprinting characteristics you’ll get pretty nicely unique browsers.
For example LibreWolf blocks canvas by default for everyone and randomizes the canvas data on every read. If you happen to use a site that uses the canvas for legitimate purposes you won’t ever see what’s supposed to be there by the original design.