I was unable to find a site to download Firefox 4, i liked it because i was able to use Pro-Con when my son searched the internet. Unfortunately there is not a Pro-Con to use for Firefox 5. I used one of the addons (the one with the Playboy bunny but it is not password protected. What do you suggest. I would live to be able to use Firefox 4 so i can use Pro-con. I attempted to use the filtering content that windows offers but it is not working and it is too confusing.