Mozilla
The articles below include content about downloading and building Mozilla code. In addition, you'll find helpful articles about how the code works, how to build add-ons for Mozilla applications and the like.
Add-ons
Add-ons allow developers to extend and modify the functionality of Firefox.
Firefox
Here you can learn about how to contribute to the Firefox project and you will also find links to information about the construction of Firefox add-ons, using the developer tools in Firefox, and other topics.
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Last modified: Sep 15, 2020, by MDN contributors
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