Our community is a global one. We have amazing contributors all around the world who help us create content, fix bugs, review content changes, and add sample code.
However, you don't need to be a professional coder or writer to help MDN! Head over to our Contribute pages to find something you can do to help, based on your expertise and how much time you have to spare.
MDN's content is entirely available under various open source licenses. This section covers the types of content we provide and what licenses are in effect for each.
Documentation and articles
MDN content has been prepared with the contributions of authors from both inside and outside Mozilla. Unless otherwise indicated, the content is available under the terms of the Creative Commons Attribution-ShareAlike license (CC-BY-SA), v2.5 or any later version.
When reusing MDN content, you need to ensure two things:
Attribution is given to the original content.
Please attribute "Mozilla Contributors" and include a hyperlink (online) or URL (in print) to the specific wiki page for the content being sourced. For example, to provide attribution for this article, you can write:
Your reuse is published under the same license as the original content—CC-BY-SA v2.5 or any later version.
Code samples and snippets
Code samples added on or after August 20, 2010 are in the public domain (CC0). No licensing notice is necessary, but if you need one, you can use: "Any copyright is dedicated to the Public Domain. http://creativecommons.org/publicdomain/zero/1.0/".
Since the launch of the new Yari MDN platform on December 14 2020, there is currently no way to determine which one you need. We are working on this and will update this content soon.
If you wish to contribute to this wiki, you must make your documentation available under the Attribution-ShareAlike license (or occasionally an alternative license already specified by the page you are editing), and your code samples available under Creative Commons CC-0 (a Public Domain dedication). Adding to this wiki means you agree that your contributions will be made available under those licenses.
Some older content was made available under a license other than those described above; these are indicated at the bottom of each page by way of an Alternate License Block.
No new pages may be created using alternate licenses.
Copyright for contributed materials remains with the author unless the author assigns it to someone else.
The rights in the trademarks, logos, and service marks of the Mozilla Foundation, as well as the look and feel of this web site, are not licensed under the Creative Commons license, and to the extent they are works of authorship (like logos and graphic design), they are not included in the work that is licensed under those terms. If you use the text of documents, and wish to also use any of these rights, or if you have any other questions about complying with our licensing terms for this collection, you should contact the Mozilla Foundation here: email@example.com.
We regularly get users asking us questions about how to link to MDN, or even if doing so is allowed. The short answer is: yes, you can link to MDN! Not only is the hypertext link the essence of the Web, it is both a way to point your users to valuable resources and a show of trust toward the work our community does.
The MDN Web Docs (previously Mozilla Developer Network (MDN), previously Mozilla Developer Center (MDC), a.k.a. Devmo) project started in early 2005, when the Mozilla Foundation obtained a license from AOL to use the original Netscape DevEdge content. The DevEdge content was mined for still-useful material, which was then migrated by volunteers into this wiki so it would be easier to update and maintain.