Nope. All of the Mozilla projects are from
www.mozilla.org, which is Mozilla (suite), Mozilla Thunderbird (stand-alone mail client), Mozilla Firefox (stand-alone browser) and also Mozilla Sunbird (stand-alone calendar program, not-so-well known... more buggy than the rest IMO).
The prefix of "Mozilla %program%" is still the official name for all of the above mentioned programs but most people just omit the "Mozilla" out because of the confusion between the Mozilla Suite and Mozilla Firefox.
Additional link:
http://www.mozilla.org/products/
Damn... Felix beat me to it.
[ 10-30-2004, 11:37 AM: Message edited by: Paladin2000 ]