Editor’s Note: This blog post is way out of date. The Mozilla Developer Network has grown a lot and changed its name to MDN Web Docs.

In 2017, more than 8,000 developers contributed to 80,000 pages of content on the Mozilla Developer Network. Mozilla also teamed with Microsoft, Google, and other industry leaders to greatly expand the scope of MDN web docs. It’s a huge collaboration and one that we all hope will make the web a better place for developers and consumers alike.

The Mozilla Developer Network (MDN) is one of the most popular resources for developers on the Web. Designed by developers for developers, MDN helps support Mozilla’s mission to promote openness and innovation on the Web.

As an open, community-driven wiki, MDN provides Web developers, designers, application developers, and extension and theme writers with access to the best documentation, tutorials and developer tools available. Anyone can add and edit content to make it even better. It’s used by developers building resources for a better Web, regardless of brand, browser or platform.

To give you a quick overview of what developers can get out of MDN we’ve put together this Top 10 list of things you should know about MDN and some tips on how to get involved.

Enjoy!

1. One of the most popular resources for developers on the Web with over 4.5 million page views and 2 million visitors per month.

2. One of the richest resources on the Web for documentation:
   49,748 documents and climbing
   9,185 contributors have made 272,134 edits to date

3. An active developer community in the MDN IRC channels including: #mdn-dev, #devmo and #mdn.

4. The only developer site to be localized in 15 languages. MDN offers translations in 15 languages for HTML docs, 13 for CSS, and 11 for JavaScript. All of these translations are created by a global community of volunteer localizers, who prioritize translation of topics based on local needs and interests. See where localization help is needed.

5. The best destination for JavaScript reference documentation anywhere.

   “MDN is hands down the best resource for finding quality JavaScript documentation. It’s well organized allowing developers to quickly find the information they need without poring through multiple specs,” – jQuery core committers

6. A great resource for developers looking for a wide variety of freshly updated content. MDN is maintained by the community of developers and technical writers and hosts literally thousands of documents on a wide variety of subjects such as: HTML5, JavaScript, CSS, Node.JS to name just a few.

   For Mobile Web developers, MDN provides documentation such as: How to build HTML5 mobile apps or build a mobile add-on or learn about location aware apps.

7. Anyone can edit or add documents to the wiki, you just need to create an account and start. Don’t worry about asking for permission; don’t worry about making mistakes. On the other hand, if you are going to be working on the site it does help to get to know the MDN community – we’re friendly and here to help!

8. Rich with community-submitted demos; over 500 and climbing. MDN introduced “Demo Studio” in 2011 – for web developers to share and show off their code.

9. Each month, the Dev Derby provides a different challenge to developers – from offline apps to “no JavaScript” (the most popular Derby topic in 2012, with 71 entries). A panel of distinguished judges choose the prize-winning entries.

10. A new HTML wiki was launched in August of 2012 – meaning developers don’t have to learn a new markup language to edit and write docs. The platform is open-source and based on Django, so developers can add new features and functionality to the wiki from Github. Also a new HTML5 WordPress plugin was launched that lets developers hotlink words on their blog to MDN.