Hi! Looks like I may have accidentally downloaded something I shouldn't have on my Macbook. When running Firefox I get annoying banners that pop-up on pages that shouldn't have ads (image links included). The ads are always promoting something different, but below the banners there is text that reads, "Ads not by this site." Anyone know what the problem might be and how I can fix it? So far, I'm only having the issue when using Firefox. I'm running OS X 10.6.8 and using Firefox 18.0.1. https://www.dropbox.com/s/h4lwl4r45q3usb5/Screen shot 2013-01-25 at 1.17.27 AM.jpg https://www.dropbox.com/s/bz411wy1few1d46/Screen shot 2013-01-25 at 1.17.55 AM.png https://www.dropbox.com/s/m8cjewpztiia3pa/Screen shot 2013-01-25 at 1.27.42 AM.png Any guidance would be so appreciated!