To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!

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Welcome to Firefox Add-ons.

Choose from thousands of extra features and styles to make Firefox your own.

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On the go?

Check out our Mobile Add-ons site.

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Calling All Add-ons!

There's no better way to distribute your add-on than by hosting it on Mozilla Add-ons.

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Firefox Add-ons Made Easy

Add-ons let millions of Firefox users enhance and customize their browsing experience. If you're a Web developer and know HTML, JavaScript and CSS, you already have what it takes to make great add-ons with the Add-on SDK. What's more, add-ons built with the SDK are restartless by default.

Start Making Add-ons