How to install firefox using the terminal app
I am assuming that you already have a connection via Terminal to the school server.

You need to download the .dmg first. Goto the directory in which you want to download the dmg file (command cd \PATH\TO\DIR)

Then enter this into the terminal:

curl http://mozilla.mirrors.tds.net/pub/mozilla.org/firefox/releases/latest/mac/en-US/Firefox%2025.0.1.dmg -o firefox25.dmg


This is the latest Firefox Release for OS X.

Then mount the dmg:

hdiutil attach firefox25.dmg


Goto the mounted dmg (probably under Volumes):

cd /Volumes/Firefox


There you can find the Firefox.app which you can now copy to your Applications folder:

cp Firefox.app /Applications/Firefox.app


To unmount the dmg:

hdiutil detach /Volumes/Firefox