Tiện ích
To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
ĐóngChào mừng đến với tiện ích Firefox.
Choose from thousands of extra features and styles to make Firefox your own.
Đóng
![[Cảnh báo]](https://addons.thunderbird.net/static/img/developers/test-warning.png?b=58a99cbb-667a0970)
Sự cho phép
Giới thiệu về Tiện ích này
Right Click and chose Loop for the examples:
http://upload.wikimedia.org/wikipedia/en/2/2e/Countdown%28example%29.ogg
http://videos-cdn.mozilla.net/brand/Mozilla_Firefox_Manifesto_v0.2_640.webm
http://upload.wikimedia.org/wikipedia/en/2/2e/Countdown%28example%29.ogg
http://videos-cdn.mozilla.net/brand/Mozilla_Firefox_Manifesto_v0.2_640.webm
