Locking Mozilla Firefox Settings

Create a text file by the name mozilla.cfg and put it in the home folder where mozilla.exe is, put the items which needs to be blocked in this file e.g.:

//
lockPref("network.proxy.type", 5);
lockPref("browser.startup.homepage", "http://ilias.ca/");

This will set the proxy settings to "System" and default the home page to the specified url.

Now byte-shift this file with an offset of 13, this can be done at this location online (http://www.alain.knaff.lu/howto/MozillaCustomization/cgi/byteshf.cgi)

In C:\Program Files\Mozilla Firefox\greprefs\ there’s a file called all.js. Open all.js in a text editor, and add the following line at the end of it:
pref("general.config.filename", "mozilla.cfg");

Save, close and start Firefox to test it.

http://ilias.ca/blog/2005/03/locking-mozilla-firefox-settings/
http://www.alain.knaff.lu/howto/MozillaCustomization/cgi/byteshf.cgi