Scroll Speed Challenge by Marco

Đo tốc độ cuộn chuột trong 5 giây. Càng nhanh càng điểm cao.

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About this extension

Scroll Speed Challenge: An entertaining Firefox extension that turns the monotonous act of scrolling into an exciting speed game. Users are challenged to scroll as fast, smoothly, and accurately as possible within a limited amount of time to achieve the highest score.

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