Have you thought about speeding up YouTube videos so that you can watch more content in a limited time? Or slow down the speed of an HTML 5 video so that you don't miss any details? In fact, all you need is a video speed controller extension.
Here in this blog, we've compiled six best video speed controllers for Chrome, Firefox, and Safari for you. Once you add one of them to your browser, you can watch videos on YouTube, Facebook, Instagram, and more at the speed you want.
Also Read: Top 5 Best GIF Speed Changers Online
Recommended: FREE Video Speed Editor Online
FlexClip is a free online video speed editor that allows you to quickly speed up or slow down a video in your browser without installing any software. You can have six speed options, ranging from 0.5x to 3x.
To adjust your video speed, click the "Change Speed Now" button below to upload your video to the FlexClip video speed editor, and then click the "Speed" button to set your video speed. Have a try now. No experience is necessary.

Image Board: Free Video Speed Editor Online - FlexClip
Part 1. Video Speed Controller Extensions for Chrome
1. Video Speed Controller (For Chrome & Firefox)
Undoubtedly, Video Speed Controller is the most popular video speed adjustment extension for Chrome and Firefox. With it, you can easily change the playback speed of any HTML 5 video. Once you have it installed in your browser, you'll see a speed controller in the top left corner of the video player when you open a page with HTML5 videos. Just click the "+" and "-" buttons on the speed indicator to increase and decrease video speed quickly. Or you can do this with your keyboard. Keyboard shortcuts are as follows:

Image Board: Video Speed Controller
- Available on Chrome and Firefox.
- Speed up, slow down, rewind, and advance any HTML5 video.
- Adjust video speed via keyboard shortcuts.
2. Youtube Playback Speed Control
The speed control extension was designed specifically for YouTube videos. It works not only for videos on YouTube but also for YouTube videos embedded in other websites. The extension allows you to speed up and slow down a YouTube video via keyboard shortcuts. All you need to do is install it on your Chrome. After that, you'll be able to watch a video at your desired speed.

Image Board: Youtube Playback Speed Control
- Easily control the playback speed of YouTube videos.
- Press '+' to increase and '-' to decrease the playback speed.
- Works for the HTML5 YouTube videos embedded in other websites.
3. Video Speed Manager
Video Speed Manager is another widely used video speed controller for HTML5 videos. It works perfectly on Chrome. With the extension, you can quickly adjust the video playback speed while watching an HTML5 video. There are no standards nor limits. Just install it to your Chrome, and speed up, slow down, rewind, and advance videos at your will.

Image Board: Video Speed Manager
- Video speed controllers for HTML5 videos.
- Speed up, slow down, rewind, or advance videos quickly.
- No standards or limits.
Part 2. Video Speed Controller Extensions for Firefox
1. Video Speed Control
The helpful Firefox add-on lets you easily control the playback speed of any HTML5 video. Once you have it installed in your browser, you can choose between speeds from 0.07x to 16x. It's worth noting that the video speed extension doesn't automatically change a video's speed. You need to open the controller to adjust the playback speed manually.

Image Board: Video Speed Control
- Change HTML5 video playback speed via toolbar popup.
- Playback speed varies from 0.07x to 16x.
2. YouTube Video Player Speed
YouTube Video Player Speed, as its name suggests, is a playback speed controller for YouTube videos. It enables you to watch YouTube videos in 2x, 1.5x, 1.25x, 1x, 0.5x, or 0.25x. Just add it to your browser, and you can play videos at whatever speed you like.

Image Board: YouTube Video Player Speed
- Play YouTube videos at various speeds (0.25x - 2x).
Part 3. Video Speed Controller Extensions for Safari
1. Accelerate
If you want to control video playback speed in Safari, Accelerate is just for you. Powerful and customizable, Accelerate enables you to easily speed up and slow down HTML5 videos via personalized shortcuts, right-click mouse controls, or a toolbar item. It works with many websites, including YouTube, Netflix, Vimeo, and more.

Image Board: Accelerate
- Change the playback speed of any HTML5 video in Safari.
- Adjust video speed quickly.
- Supports a lot of websites, such as YouTube, Netflix, Hulu, Vimeo, and more.
- Supports picture-in-picture and AirPlay.
Conclusion
That’s all for the six best video speed controllers for Chrome, Firefox, and Safari. Don’t forget to give one of them a try when you want to speed up or slow down an online video.
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FAQs About Video Speed Control
Upload your video to the FlexClip Video Speed Editor and click the "Speed" button to select the speed you want. You can increase your video speed from default 1x to 3x. It’s free, easy, and quick.
Yes, you can. There are many ways to slow down a YouTube video. You can slow down a YouTube video from the default 1x to 0.75x, 0.5x, or 0.25x by clicking the "Playback Speed" button in the Settings option. Or you can add a video speed controller extension mentioned above to your browser to control YouTube video speed via keyboard shortcuts or toolbar.
To change the playback speed of videos in your photo album, you'll need a third-party video player. Of all the mobile media players, nPlayer is the best. It is available on iOS and Android. It supports popular video formats and allows you to play videos at various speeds from 0.5x to 4x.