I restarted, no viruses, maybe my computer is wearing down? just getting to this page took me >2 minutes.
Computers don't wear down much on their own.
Do you happen to be running though any proxies. If you aren't, check anyways, some malware will mess with your settings and run you though one. Check firefox and your computer settings.
FirefoxWindows Proxy SettingsIf either of these are set to use a proxy and you never messed with the proxy settings, you have a problem.
Also, make your task manger (ctrl-alt-delete) window big enough to see all your running processes and post a pic.