I have ubuntu server edition installed and I want to install firefox inside it , I don't want full ubuntu-desktop package just a minimal setup which would let me run firefox inside ubuntu-server 10.04 LTS
If you just want to install Firefox and run it remotely, install the
firefox package. If you also want to run Firefox locally, you'll need a GUI environment: install the
x-window-system package. If you also want to run Firefox locally comfortably, you'll need a window manager (any of the packages that provide the
x-window-manager virtual package) or desktop environment (the Ubuntu default is Gnome, install at least
apt-get install firefox x-window-system gnome-core
Strictly speaking, this won't be a minimal system, as it'll pull up a few packages that are recommended but not strictly necessary. Install all recommended packages unless you understand why you don't need them (in other words, if you need to ask, install them all).