Recently, I tried to access the internet using Firefox. I have a good wifi signal according to the toolbar at the top, but Firefox says "Firefox can't find the server at
www.example.com." I tried disabling UFW, but that did nothing. What exactly is happening that is preventing Firefox from accessing the internet, and how can I fix this issue?
I'm using Ubuntu 12.10, and the machine is a Compaq Presario CQ62.
NOTE: Just before the issue, Firefox installed an update. Also, I did not use the computer for a month or so before this issue, and the last time I used it there was no such issue.