connected at 2.3mbps
Actually, all that is showing is that the PC can see the wireless router at a "hardware" level - it may not be actually receiving IP configuration settings from the router via DHCP. It would also suggest that any WEP or WPA security is correcly configured - or not applied.
I doubt that installing another browser will help - I very much suspect that it is a network issue, not an application problem.
SD