Internet SoftwareBrowsers, email clients, VoIP... the list goes on. From Firefox to FTP clients, talk about every program that connects to everything else here.
Hey, sometimes the firefox disables some sites and allows it after some times, why?
Happens to me sometimes. They may have an update for it. Make sure there isn't a little red button of the right hand corner of your screen. If there is, click on it for the update