At present, by design, it doesn't scan for cookies.
No--it isn'd designed as a popup stopper. However, many popups are
generated by spyware, so they may be a symptom of spyware that your
available protection has missed.
I saw a couple of pop-unders just the other day--first I had seen in a good
while. I'm satisfied that they didn't originate with spyware, but
unfortunately they were likely associated with a site I'd posted a URL to
here.