Just today I have a couple of cloudfront entries in my hosts, and by using the sliders and finding the time the entries appeared, and corresponding them to my Chrome history, I can see that the those entries were actually tied to when I was searching Amazon a little earlier for an indoor grill. It's just an idea of something that you could try.
Granted, it's not a lot of data in comparison to the rest, but it may help to figure out what it's tied to.
Gonna go ahead and close this thread since it's gone inactive for a while. If you still have concerns, please start a new thread.