Video Speed Controller Firefox

Video Speed Controller

Use the keyboard to control online video/audio playback speed, perfect support for Youtube.

Features & Capabilities

Use the keyboard to control online video/audio playback speed, perfect support for Youtube. It control video speed up, slow down, advance and rewind with shortcuts.

Faster HTML5 Video

HTML5 video provides a native API to accelerate playback of any video. The problem is many players either hide or limit this functionality. For the best results, playback speed adjustments should be easy and frequent to match the pace and content being covered: we don't read at a fixed speed, and similarly, we need an easy way to accelerate the video, slow it down, and quickly rewind the last point to listen to it a few more times.

Once the extension is installed simply navigate to any page that offers HTML5 video (example), and you'll see a speed indicator in top left corner. Hover over the indicator to reveal the controls to accelerate, slowdown, and quickly rewind or advance the video. Or, even better, simply use your keyboard:

  • S - decrease playback speed.
  • D - increase playback speed.
  • R - reset playback speed.
  • Z - rewind video by 10 seconds.
  • X - advance video by 10 seconds.
  • V - show/hide controller.
You can customize and reassign the default shortcut keys in the extensions settings page as well as add additional shortcut keys to match your preferences. As an example, you can assign multiple "preferred speed" shortcuts with different values, allowing you to quickly toggle between your most frequently used speeds. To add a new shortcut, open extension settings and click "Add New".

Unfortunately, some sites may assign other functionality to one of the shortcut keys - this is inevitable. As a workaround, the extension listens both for lower and upper case values (i.e. you can use Shift-<shortcut>) if there is other functionality assigned to the lowercase key. This is not a perfect solution since some sites may listen to both, but it works most of the time.

User Growth & Download Statistics

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
Igrigorik
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/videospeedcontroller/
Website:
https://github.com/igrigorik/videospeed

User Reviews

by Fi*****, 2026-06-09

by br*****, 2026-06-08

by fr*****, 2026-05-31
View all user reviews ›

Is Video Speed Controller Safe?

Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Video Speed Controller requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details
  • Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
  • Critical ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Video Speed Controller is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
  • Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
  • Good **** ********* *** **** **** *******
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