Firefox and other Mozilla-based applications have a powerful extension system that allow you to make small tweaks or make major additions to your programs. If you’re new to this technology, learn how to build an add-on. For experienced developers, find out how to become an AMO editor.
Get involved with Mozilla by making Firefox, Thunderbird and other projects available in your language. Also help us tell the world about how Mozilla is building a better Internet by translating content on our web sites.
Marketing and Evangelism
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