Can the Firefox settings be controlled centrally?
Yes, and more flexible than IE versions zoo at user computers. Download
a Firefox ZIP (not Firefox_Setup_1.0.exe but Firefox 1.0.zip), unpack it
to R/O share on file server, edit JS configuration files in
.\defaults\pref and .\greprefs, then create a shortcut to firefox.exe on
user desktops. To change FF settings, edit JS configs again. Voila!