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

Đóng

Chào mừng đến với tiện ích Firefox.

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

Đóng

On the go?

Check out our Mobile Add-ons site.

Đóng

DuckDuckGo NEXT 20140510

Giấy phép Mã nguồn

MPL 1.1

The same of https://addons.mozilla.org/en-US/firefox/addon/duckduckgo-ssl/?src=search 
Here is : http://www.mozilla.org/MPL/1.1/