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Mozilla Public License

This article is about free and open-source software license. For other uses, see Mozilla Open Software Patent License.
Mozilla Public License
AuthorMozilla Foundation[1]
Latest version2.0[1]
PublisherMozilla Foundation[1]
PublishedJanuary 3, 2012[1]
SPDX identifierMPL-2.0
MPL-1.1
MPL-1.0
(see list for more[2])
Debian FSG compatibleYes[3]
FSF approvedYes[4]
OSI approvedYes[5]
GPL compatible2.0 and later: 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
Websitewww.mozilla.org/MPL
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The Mozilla Public License (MPL) is a free and open-source weak copyleft license for most Mozilla Foundation software such as Firefox and Thunderbird.[9] The MPL is developed and maintained by Mozilla,[10] 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 GNU General Public License.[11] As such, it allows the integration of MPL-licensed code into proprietary codebases, as long as the MPL-licensed components remain accessible under the terms of the MPL.

MPL has been used by others, such as Adobe to license their Flex product line,[12] and The Document Foundation to license LibreOffice 4.0 (also on LGPL 3+).[13][14] Version 1.1 was adapted by several projects to form derivative licenses like Sun Microsystems' Common Development and Distribution License.[15] It has undergone two revisions:[16] the minor update 1.1, and a major update version 2.0[17] nearing the goals of greater simplicity and better compatibility with other licenses.[18]

  1. ^ a b c d "Mozilla Public License, version 2.0". Mozilla Foundation. Retrieved February 28, 2012.
  2. ^ "SPDX License List". spdx.org.
  3. ^ "Mozilla Public License (MPL)". The Big DFSG-compatible Licenses. Debian Project. Retrieved June 6, 2009.
  4. ^ a b "Mozilla Public License (MPL) version 2.0". Various Licenses and Comments about Them. Free Software Foundation. Retrieved January 3, 2012.
  5. ^ "Open Source Licenses". Open Source Initiative. December 19, 2011. Retrieved January 7, 2012. Mozilla Public License 2.0 (MPL-2.0)
  6. ^ Cite error: The named reference FSF_FAQ_11 was invoked but never defined (see the help page).
  7. ^ "MPL 2.0 FAQ". Mozilla Foundation. Retrieved October 14, 2020.
  8. ^ Copyfree Rejected Licenses
  9. ^ "Mozilla Foundation License Policy". Mozilla Foundation. Retrieved February 29, 2012.
  10. ^ "Open Source Software: a legal guide". LawGives. Archived from the original on July 30, 2020. Retrieved September 8, 2015.
  11. ^ Andrew Laurent (2004). Understanding Open Source and Free Software Licensing. O'Reilly Media, Inc. p. 62. ISBN 978-0-596-00581-8.
  12. ^ "Adobe Flex FAQ: Licensing". Adobe Systems. Retrieved February 29, 2012.
  13. ^ "The meaning of the 4.0". January 24, 2013.
  14. ^ "Licenses". LibreOffice.
  15. ^ Fontana, Richard (January 9, 2012). "The new MPL". Retrieved March 1, 2012.
  16. ^ "Historical Licensing Documents". Mozilla Foundation. Retrieved February 29, 2012.
  17. ^ "Mozilla Public License 2.0 (MPL-2.0) | Open Source Initiative". opensource.org. December 19, 2011. Retrieved March 9, 2022.
  18. ^ "About MPL 2.0: Revision Process and Changes FAQ". Mozilla Foundation. Retrieved February 29, 2012.
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