There's also the unnecessary use of untrusted JavaScript that sites pull in from their ad networks.
A few years ago I tried running without ad or JavaScript blocking at work. That lasted a few weeks until the day I got an JS driven redirect to a porn site from a work related search result. I have no sympathy for the clowns who imposed this garbage on the world.
https://twitter.com/RunDaltonRun/status/1408578486046887939
This thing is for tracking what you look at, and is supposed to help the store figure out how to "optimize" their shelf.