欢迎访问 Firefox 附加组件。
How to use it? After installing the extension, go to youtube.com and click a video. You'll notice a new "Download" button below the player. Click the button and begin strating video ,many format are available .
Note: A page contains our search engine based on Google will be displayed every time you open a new tab in your browser.
Credits: The extension has been originally created by Arpit Kumar.