Michael Kaply posted a very interesting series of articles on Deploying Firefox 2 within the Enterprise, it could be valid for Firefox 3 I guess. Seven articles in total showing step by step how you can customize and deploy Firefox inside your enterprise without worrying about Mozilla trademark policies, as long as you don’t distribute it outside. The articles cover building a custom version of Firefox, adding Enterprise specific customizations to Firefox, Creating a Firefox installer and Setting up your own update server to deploy Firefox patches, definitely a must read for enterprise :