Customize Firefox

Add-ons let millions of Firefox users enhance their browsing experience. If you know HTML, JavaScript, and CSS, you already have all the necessary skills to make a great add-on.

Learn How to Make an Add-on

Port a Chrome Extension

Firefox supports WebExtension APIs, which in most cases are compatible with the extension APIs supported by Chrome, Opera and Edge, so your extensions will run in Firefox with just a few changes.

방법 알아보기

Publish Your Add-on

Have an add-on ready? Submit your extension or theme to be listed on addons.mozilla.org or sign and distribute your extension on your own.

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Resources for a successful launch

You've built your extension and are ready to publish it. What comes next? Check out our tips for creating an appealing listing page, getting your extension featured on addons.mozilla.org, finding answers to development questions, and staying up-to-date with news and events relevant to extension developers.

View Resources for Publishers

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Web-Ext
A command line tool to build, run, and test extensions.
부가 기능 검사기
Automated code tests for your add-on.
Compatibility Test
Check to see if your extension is compatible with Firefox.
Live Testing
Temporarily install your extension in Firefox for live testing and debugging.

Customize Firefox

Port a Chrome Extension

Publish Your Add-on

부가 기능 관리하기

Resources for a successful launch

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