Addons.mozilla.org (AMO), is Mozilla's official site for discovering and installing add-ons for the Firefox browser. Add-ons help you modify and personalize your browsing experience by adding new features to Firefox, enhancing your interactions with Web content, and changing the way your browser looks.
If you are looking for add-ons for Thunderbird or SeaMonkey, please visit addons.thunderbird.net or addons.thunderbird.net/seamonkey.
The add-ons listed here are created by thousands of developers and theme designers from all over the world, ranging from individual hobbyists to large corporations. Some add-ons listed on AMO have been automatically published and may be subject to review by a team of editors once publically listed.
Mozilla is a non-profit champion of the Internet, we build Firefox to help keep it healthy, open and accessible. Add-ons support user choice and customization in Firefox, and you can contribute in the following ways:
If you want to contribute but are not quite as technical, there are still ways to help:
To see more ways you can contribute to the add-on community, please visit our wiki
If you would like to learn more about how to manage add-ons in Firefox, or need to find general Firefox support, please visit Support Mozilla. If you don't find an answer there, you can ask on our community forum.
Information about how to contact Mozilla's add-ons team can be found here.