I am thinking of downloading the 64-bit version of Firefox (Cyberfox) to my Windows 8.1 machine.?

I had earlier installed the latest version of Firefox and immediately lost my connection with the internet; I had to uninstall it and refresh my pc.

Anonymous2015-01-19T10:50:45Z

Maybe The Problem Is In Proxy Try Internet Explorer > Internet Options > Connections > LAN Settings > And Unmark Use Proxy, And Then Apply.