Instructions:
If you want to upgrade from 6.06 LTS to 6.10, run the following command (either via ALT-F2 or a terminal):
gksu "update-manager -c"
The "-c" switch instructs Update Manager to look for upgrades at all. By default the 6.06 LTS release will not offer that automatically because of its long support cycle and high stability.
If you have a working network connection, it should then inform you about a new release and offer to upgrade your system.
As for Firefox - I use Swiftfox - you can download an Ubuntu version at www.getswiftfox.com.
Enjoy!
Regards, Ivan
I tried the command you provided, both in terminal and "run command." The message I got was this:
X Error: BadDevice, invalid or uninitialized input device 166
Major opcode: 144
Minor opcode: 3
Resource id: 0x0
Failed to open device