The Mozilla Public License (MPL) is a free and open-source weak copyleft license for most Mozilla Foundation software such as Firefox and Thunderbird[8] The MPL license is developed and maintained by Mozilla,[9] which seeks to balance the concerns of both open-source and proprietary developers; it is distinguished from others as a middle ground between the permissive software BSD-style licenses and the General Public License.[10] So under the terms of the MPL, it allows the integration of MPL-licensed code into proprietary codebases, but only on condition those components remain accessible.[citation needed]

Quick facts: Author, Latest version, Publisher, Published,...
Mozilla Public License
AuthorMozilla Foundation[1]
Latest version2.0[1]
PublisherMozilla Foundation[1]
PublishedJanuary 3, 2012[1]
SPDX identifierMPL-2.0
(see list for more[2])
Debian FSG compatibleYes[3]
FSF approvedYes[4]
OSI approvedYes[5]
GPL compatible2.0: Yes[4] (by default, unless marked as "Incompatible With Secondary Licenses")
1.1: No[6]
CopyleftYes, file-based[7]
Linking from code with a different licenceYes

MPL has been used by others, such as Adobe to license their Flex product line,[11] and The Document Foundation to license LibreOffice 4.0 (also on LGPL 3+).[12][13] Version 1.1 was adapted by several projects to form derivative licenses like Sun Microsystems' Common Development and Distribution License.[14] It has undergone two revisions:[15] the minor update 1.1, and a major update version 2.0[16] nearing the goals of greater simplicity and better compatibility with other licenses.[17]

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