| It could be that you are using KDE as a desktop environment for the first time. Its quite different to Gnome, but easy to get used to. Also, the live CD contains only a small proportion of the 25,000+ packages available from Debian, so things that you have used before may not be there. Try the DVD version (one DVD is enough to get started for most users).
As for firefox, Debian considers it non-free, and doesn't install it by default. Instead Debian uses a browser called Iceweasel, which is to all intents and purposes the same as (and as good as) firefox. That may or may not be provided by the live CD. If not, either use Konqueror, or download the first DVD.
Preferences are reached via the K menu at the bottom left-hand corner of your desktop. The program is called "system settings", and is in the "system" sub-menu. The package manager that Debian recommends is Aptitude, available from a command line, by typing "aptitude". Remember that you'll need to work as root to install anything (type su at the command prompt, followed by your root password).
Debian isn't as easy for beginners as some distros, but in the long run it is (in my opinion) far better, particularly for those who want to really get the most out of what linux has to offer. Just keep experimenting, and read the reference manual. |