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What is the Mozilla Public License?
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Jan 30, 2024 · About MPL. Q1: What is the Mozilla Public 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.
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 License 2.0 Requirements. Open source software licenses fall into two categories: permissive and copyleft. Copyleft licenses, in turn, come in two flavors: strong and weak. The Mozilla Public License 2.0 is in the latter group. The difference between the two forms of copyleft licenses lies in the scope of source code to be shared.
The MPL license is a copyleft license, which means that in principle people are not allowed to distribute code that is under the MPL-2.0 license under different terms. The GPL licenses (including LGPL and AGPL) require that the entire application is distributed under the terms of the GPL license.
The Mozilla Public License (MPL) is the least restrictive copyleft open source software license. They make it easy to modify and use their code in closed-source and/or proprietary software, as long as any code licensed under the MPL is kept in separate files and these files are distributed with the software.
The Mozilla Public License (MPL) is a free and open-source weak copyleft license for most Mozilla Foundation software such as Firefox and Thunderbird.
For example, GPL v2, GPL v3, and AGPL are examples of strong copyleft licenses, while the Mozilla Public License (MPL) maintained by the Mozilla Foundation is a weak copyleft license. The LGPL, or Lesser General Public License, is another example of a copyleft license that falls somewhere between strong and weak copyleft licenses.
