Is MPL A Copyleft License?
The MPL is a simple copyleft license. The MPL's "file-level" copyleft is designed to encourage contributors to share modifications they make to your code, while still allowing them to combine your code with code under other licenses (open or proprietary) with minimal restrictions.
Can I use MPL license commercial?
Users of MPL 2.0-licensed code may: Use the code in commercial applications. MPL'd code can be included in software that's sold commercially.
Open Source Software Licenses 101: Mozilla Public License 2.0
Is Mozilla Public License free?
Mozilla is the custodian of the Mozilla Public License ("MPL"), an open source/free software license. The current version of the license is MPL 2.0 (html | plain text).
Mozilla Public Licence
Many of the most common free-software licenses, especially the permissive licenses, such as the original MIT/X license, BSD licenses (in the three-clause and two-clause forms, though not the original four-clause form), MPL 2.0, and LGPL, are GPL-compatible.
License compatibility - Wikipedia
The Mozilla Public License (MPL) is a free and open-source software license developed and maintained by the Mozilla Foundation.
Mozilla Public License - Wikipedia