OT: Computer Networking

[PvK]

A wireless router (and wireless network cards for each computer, assuming you want to do it wireless) would do it. The router is what plugs into the Internet, and then shares it to the computers on your local network, also protecting them from many direct attacks. Though do set up security on the router and your computers so you're not allowing anyone in radio range to access your computers...

For FireFox, I'm not sure. All I see is Tools/Options/Content/Fonts&Colors, which lets you set default font size, but it's not as good as Opera's Zoom feature, and might not have any effect on pages which set font sizes...