If you're trying to focus on safe surfing, download the WOT(Web of Trust) addon for Firefox. It is based on ratings of fellow users and has good info on almost all websites. It comes up in all google searches and displays a full-screen warning if the site with a nude Lindsey Lohan, Hillary Clinton, Barbara Bush, or whoever is a dangerous site.
You can find more info on the Mozilla addon site. https://addons.mozilla.org/en-US/firefox/addon/3456
Other than that I don't have a clue.