Once you set your homepage and proxy settings on one machine, you can readily copy the settings to another eeePC.
Firefox settings are held in /home/user/.mozilla/firefox/somevariablefolder/prefs.js. Manually copy this to a networked mounted file share (e.g. /home/classwork/technical/prefs.js) and then run the following script on each machine you want setup the same way.
#!/bin/bash prefslocation=$(find /home/user/.mozilla/firefox -name prefs.js) cp /home/user/classwork/technical/prefs.js $prefslocation