I must say that I really, really like the “Adblock extension for Firefox”:https://addons.mozilla.org/firefox/10/. In addition to just being able to clear all those really annoying advertisements that many sites have, if you come across an image that bugs you on a site you frequent, just adblock it. Voila! No more annoying image. I sometimes forget I have this installed, so some images annoy me for far longer than they ought. Lately, I’ve been using to block disturbing avatars on a couple of forums.