You can create a defaults\profile template folder in the Firefox program folder for new profiles the same way as in older versions. That folder only isn't there anymore because all files have been moved to the omni.ja(r) archive, so you need to create it yourself.

This may help:

http://www.sevenforums.com/tutorials/208070-firefox-create-run-multiple-profiles.html

Thank you very much, all, for taking the time to respond. However, even the multiple profiles instructions from dad8832 doesn't help. The thing is, it works fine if you want to use mulitple profiles while signed on the same single user that you start out with. If you want the profile to be used by every new user of the computer, however, this doesn't seem to work. Even when I place the profile in a common folder and set a shortcut to it, it doesn't work. I get that error that firefox is already running.

Thanks for your time, I'll keep looking, I suppose!

Did you create a defaults\profile in the Firefox program folder (C:\Program Files\Mozilla Firefox\)?

All files in that folder will be moved to each newly created profile folder.

For giving prefs a default value it is better to do that via a mozilla.cfg file.

Use a mozilla.cfg file in the Firefox program folder to lock prefs or specify default values.
Place a file local-settings.js in the defaults\pref folder where you also find the file channel-prefs.js to specify using mozilla.cfg.

pref("general.config.filename", "mozilla.cfg");
pref("general.config.obscure_value", 0); // use this to disable the byte-shift

See:

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

You can use these functions in mozilla.cfg:

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