^^Wazzup!
SimpleBlock prevents URL's from loading. I used AdBlock+ for a short while and my experience wasn't satisfactory.
AdBlock+ didn't work for me. Especially when I am searching for something especially obscure on the net or visiting my beloved porn hub, it does not block the pop ups or possible pornadoes (if your still on WinXP). Now that I am on windows seven, I use Chrome as a browser and that serves it's purpose well but I TFP and watch TV on firefox so any popup's that err ... pop-up
are blank and do not draw any data from their intended sources.