Is Mozilla Public License Copyleft?
As a weak copyleft license, the Mozilla Public License 2.0 allows OSS authors to both protect their contributions to a piece of OSS and have the opportunity for their work to be incorporated into well-known and successful pieces of proprietary software.
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.
MPL 2.0 FAQ - Mozilla
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). If you want to use or distribute code licensed under the MPL 2.0 and have questions about it, you may want to read the FAQ.
Mozilla Public Licence
Public domain. This is the most permissive type of software license. When software is in the public domain, anyone can modify and use the software without any restrictions. But you should always make sure it's secure before adding it to your own codebase.
5 types of software licenses you need to understand | Synopsys