same issue, not that alarming
I believe they are a direct link to a cookie on websites to keep track of your browser traffic, lots of websites use them, some more aggressively than others, I just delete them through 7zipper 2.0. If you stay on top of it, check once a week, it doesn't get too out of hand.
Read this article; type in your browser "what is a cookie?' And click the link, ".... All about cookies" I can't post links yet, sorry.
Correct me or add to if you find anything else