Similar pop up blocker as in Firefox but in Safari?

i just download firefox on my mac and chose to open firefox with add-ons disabled mode. I went on many websites and clicked on the outskirts of the page and no pop ups appeared. however when i do this with safari, i have hidden pop up windows appearing behind the active screen. what settings can i do in safari which is similar to the one in firefox. i have already enabled the safari pop up blocker. thanks guys