OK. I know it's from mozilla but how and why is it on my system? I've just done a windows update and there's Nightly. Recently installed and recommended.<p>I love firefox, mainly because it's not chrome. (Don't really have anything against google except for the fact that they are too big and powerful and need to die.)<p>Browsers are so integral to what's going on on the desktop that I cannot believe that I installed this. Especially since I've never believed that private browsing is in anyway useful or private.<p>What happened?