For Re-Packaging Firefox, you can follow this link:

http://msiworld.blogspot.com.au/2012/01/packaging-mozilla-firefox-901.html

For creating lock down environment create a notepad file and save it as mozilla.cfg

This file should start with "//" as first line from the second line necessary lock down options should be added.

lockdown options are available under "about:config" page.

config file(mozilla.cfg) has to be placed under "C:\Program Files\Mozilla Firefox\" folder.

for loading the config file you have to place the "local-settings.js" file under "C:\Program Files\Mozilla Firefox\defaults\pref"

following content has to be appended if file exist or this file has to be created and added.

<<-code

pref("general.config.obscure_value", 0);
pref("general.config.filename", "Mozilla.cfg");

->>end of code

for override the profile import create override.ini under "C:\Program Files\Mozilla Firefox\" and add following contents

<<-code

[XRE]
EnableProfileMigrator=false

->>end of code

 i tesed with version 15 to 17 and works

for more reference : http://kb.mozillazine.org/Locking_preferences

"firefox setup 10.0.exe" -ms