Hate to give up

[John Heinen]

I struggled for a long time to have an internet connection for Ubuntu
8.o4,  we got it going except for Firefox it  would not start..Once it
is done it seems so simple but it wouldn't be without your help
 Upgraded to Ubuntu 8.1o, everything just fine except Firefox, cannot
get  it  started. We unchecked  Firefox off/line but still, Firefox
won't start.
Can somebody walk me through this challenge  John