I have followed every single step in the article. I have installed and re-installed firefox, cleaned my cache, run every malware program, even restored a former version of firefox and run a system restore on my computer from before the problem occured. This morning my computer powered off without warning and when I rebooted, firefox would not work. I can connect to explorer and my remote desktop at work, so I know the internet connection works (even though I have still powered off and repowered my routers).