这个好用，链接很流畅，声音清晰

Since Firefox was updated Closed Captions look tiny

works

Just what I needed. I've been using this extension for a while now, and I must say, it's an exceptional tool. The keyboard shortcuts are similar to Youtube and provide a level of flexibility that I haven't seen in other extensions. The keyboard shortcuts are intuitive and make navigation a breeze, and the Picture in Picture (PIP) mode is a game-changer for multitasking. And the best part? It's super lightweight and doesn't slow down the browser, even when streaming high-quality videos.
Two thumbs up from me!