I haven't seen a pop-up window in ages - Mozilla so rules.
I haven't seen a third party ad banner in ages. I'm mapping as many ad banner sites as I can find to "127.0.0.1" in my /etc/hosts. I was given a really good list to start and I added ones that I found along the way. Then, I'm running a tiny personal web server (mem: 1.7M) on my machine to serve up a transparent image in the place of the ad banner image.
The Internet is very quiet.