Audio and Video Karma never finishes loading

[wa2ise]

I noticed today that these two forum sites never seem to finish loading data from various domain addresses (I think that's the correct term ). That the Firefox green tailchasing circular icon (the thing in the left part of the tab at the top of Firefox's screen) never stops spinning. Maybe I caught a virus, but other web sites are not doing this. I also see a box in the lower left of the Firefox window saying "Transferring data from images.sv.us.criteo.net..." right now (9:40 PM EDT, Sept 24th).