Manage Firefox preferences through GPO.

This add-on allows to manage preferences from windows registry. You can then use Group Policies from Microsoft Active Directories to manage Firefox preferences.
To use this add-on you will need an additional adm file to define the registry keys that GPO for firefox add-on will read.
Currently the add-on will read its preferences from HKLM or HKCU \Software\Policies\Mozilla\LockPref for locked settings and HKLM or HKCU \Software\Policies\Mozilla\defaultPref for normal users preferences.