Video Speed Controller (Unofficial-FF-Fork)

Name: Video Speed Controller (Unofficial-FF-Fork)
Rating: 5 (1 reviews)
Author: forkdons

Control HTML5 video/audio playback speed with keyboard shortcuts. Unofficial Firefox fork of the original Video Speed Controller project.

Download

Install

Features & Capabilities

This add-on is an unofficial fork of the original open-source Video Speed Controller project by Ilya Grigorik.

Features:

speed up / slow down HTML5 video and audio playback,
quick rewind / advance,
toggle preferred speed,
show/hide on-page controller,
customizable keyboard shortcuts,
site blacklist support.

Default shortcuts: - S slower - D faster - R reset to 1.0x - Z rewind 10s - X advance 10s - G preferred speed toggle - V show/hide controller - M set marker - J jump to marker

Project origin notice

This is not an official release from the original author.
Upstream repository: https://github.com/igrigorik/videospeed
This fork is maintained separately for Firefox distribution.

License

Distributed under the MIT License. The package preserves the original license text (LICENSE) and includes fork attribution (FORK_NOTICE.md) in compliance with MIT requirements.

User Growth & Download Statistics

Add-on

By:

forkdons

Daily users:

Rating:

5.00

(1)

Version:

0.9.5 Last updated: 2026-02-26

Version code:

6158945

Creation date:

2026-02-23

Risk:

Permissions:

Content scripts matches:

Size:

99.99KB

Email:

fo*****@hento.info

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-03

Compare stats and ranking:

Ranking

# 75,876 ▼ 144

Other rankings

#45 in fvd speed dial keyword 42 ▼ 1#83 in video speed keyword 56 ▲ 1

For Developers

Monetize with App Pass Boost with Extension Booster

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:

forkdons

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/video-speed-controller-fork/

Email:

fo*****@hento.info

Is Video Speed Controller (Unofficial-FF-Fork) 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 (Unofficial-FF-Fork) requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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 (Unofficial-FF-Fork) 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.
Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****
Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
Good **** ********* *** **** **** *******