youtube、Amazonプライムビデオ、Abemaで使っています。〇秒飛ばし・〇倍速を好きな秒数で好きなキーショットカットに設定できて便利

I've been using Video Speed Controller and it makes adjusting playback speed on any HTML5 video effortless. The fine-grained control and keyboard shortcuts are very convenient for lectures and tutorials. It remembers settings per site and feels lightweight, reliable, and smooth without interfering with normal viewing experience at all sessions.

works