You'll have to be more specific in your questions. Can you tell more clearly what information you're looking for?
The Mozilla Public License is a free software license that gives certain extra privileges to the original entity releasing the code. It was created by Netscape when it released the Mozilla source code.
For you as a user it allows you to freely use the software, in both commercial and non-commercial settings. As per modification of code, you can do that, but I don't know all the particulars of that license.
There's good information at www.gnu.org and www.opensource.org.
