using adblock plus?
I have NEVER seen a popup with Mozilla Firefox.
Maybe even try NoScript.
I'M HAVING A PROBLEM WITH POP UPS RUNNING FIREFOX I HAVE IT SET TO BLOCK ALL POP UPS BUT ON A LOT OF SITES THEY STILL COME IE: TAGGED, AND EVEN YAHOO. I'M RUNNING XP SP2. I HAVE INSTALLED ADD-ONS TO FIREFOX WHICH INCLUDE YAHOO MAIL AND G-MAIL, FOXMARKS AND SXIPPER, ALSO HAVE ACCUWEATHER. ANY SUGGESTIONS?