No It doesn't, I have Firefox(2.0.0.12) and disabling Adblock or Adblock Plus does no good in My case, I get a white background and a blue icon when logged in, When I'm not logged in I get the same as if I'm in IE 7.0 minus a couple of images that appear and disappear in about a second or so, In IE 7.0 the images and black background stay of course. I tried disabling the pop-up blocker as that is the only blocker that is built into Firefox and disabling that and refreshing the webpage while the other two Blockers are still off(Disabled) did nothing at all, Besides refresh the page of course.