Locking prefs should still work in Firefox 4.

• http://kb.mozillazine.org/Locking_preferences

lock firefox homepage

With Firefox 3 and older I could lock down the homepage using the instructions on this page:

http://ilias.ca/blog/2005/03/locking-mozilla-firefox-settings/

With Firefox 4 it does not appear to work anymore. Does anyone know how to lock down the homepage with version 4?

Thanks

Use the instruction as written in:

• http://kb.mozillazine.org/Locking_preferences

Create a file local-settings.js in the defaults\pref folder with this content:

pref("general.config.filename", "mozilla.cfg").

Add this line if you want to disable the byte-shifting in mozilla.cfg.

pref("general.config.obscure_value", 0);

Place the mozilla.cfg file in the main Firefox program folder.

You can use these functions in mozilla.cfg :

defaultPref();  // set new default value
pref(); // set pref, but allow changes
lockPref();  // lock pref, disallow changes

To lock down homepage in Firefox 5 (tested, Windows XP):

1) In ...\Program Files\Mozilla Firefox\defaults\pref\ (folder) using Notepad create file local-settings.js containing following code lines:

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

Without the last line (general.obscure_value override) it won't work.

2) In ...\Program Files\Mozilla Firefox\ using Notepad create file mozilla.cfg with following code lines:

//
lockPref("browser.startup.page", 1);
lockPref("browser.startup.homepage", "about:blank");

Without the first code line the homepage setting won't lock. For general.obscure_value >0 mozilla.cfg must be byte-shifted by the specified number of bytes.

Other lock downs can presumably be added, but not tested.