Firefox doesn't need anything installed to it to use a wireless connection. The Operating System makes the connection, and Firefox will use whatever connection is made by WindowsXP. Whatever "software" you have is probably for WinXP, if you need to install anything at all - "wi-fi" support is built into WinXP. Are you trying to connect to a "wi-fi" network, or it that a wireless internet service? If the later, have you tried getting help from that service provider? If that is a "wi-fi" issue, I can't give you step by step instructions for WinXP as I haven't had an XP laptop in a few years. On my Linux netbook there's an icon in the System Tray that is for "connections", I right-click that icon and open the Connect window to see what "networks" are available; then I select the "network" I want to connect to - fill out the credentials needed for that "network" and the connection is made.