Global Speed - Video Speed Control

Name: Global Speed - Video Speed Control
Rating: 4.7592 (299 reviews)
Author: POLYWOCK

By: POLYWOCK

Set a default speed for video and audio.

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Features & Capabilities

Global Speed - Video Speed Control lets you apply a default playback speed for all video and audio across websites you visit, including YouTube, Netflix, Spotify, and podcasts.

Features include keyboard shortcuts for rewinding/forwarding (Z/X), frame-by-frame analysis (Shift+Z/Shift+X), mark-and-jump (Shift+W, W), and optional shortcuts for volume and fullscreen. It also supports drawing on the page, darkening video backgrounds, and applying filters (invert, grayscale, brightness, contrast, mirroring) across videos or the entire page. A powerful URL rule system lets you automatically set speeds or filters per site. Open source on GitHub: https://github.com/polywock/globalSpeed

User Growth & Download Statistics

Add-on Developer Tools Open Source Content

By:

Daily users:

Rating:

Version:

3.3.13 Last updated: 2026-04-09

Version code:

6202812

Creation date:

2020-01-16

Risk:

Permissions:

Host permissions:

https://*/*
http://*/*
file://*/*

Content scripts matches:

Size:

432.63KB

Email:

po*****@gmail.com

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-17

Compare stats and ranking:

Ranking

# 307 ▲ 2

Other rankings

#38 in Photos, Music & Videos

#1 in video speed keyword 56

#2 in speed keyword 48

#10 in self control keyword 45

#11 in control keyword 46

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Other platforms

Global Speed - Video Speed Control (v3.3.13)

700,000 4.75

(799)

Global Speed - Video Speed Control (v3.3.13)

5,699,490 4.60

(1,051)

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:

POLYWOCK

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/global-speed/

Email:

po*****@gmail.com

Website:

https://github.com/polywock/globalSpeed

Permission Change History

2025-07-28: Version 3.2.17 → 3.2.30

Add Optional permissions: clipboardRead clipboardWrite

2024-08-16: Version 2.9.9971 → 3.0.997

Add Host permissions: https://*/* http://*/* file://*/*

Add Permissions: scripting contextMenus

Remove Permissions: https://*/* http://*/* file://*/*

Remove Optional permissions: clipboardWrite clipboardRead

User Reviews

Users praise Global Speed for its ease of use, broad site compatibility, and strong customization, making high-speed viewing convenient across many sites. The main recurring drawback is reliability on Firefox, including occasional audio/video desync after speed changes and sporadic stability problems. Some users note bugs and would like per-source control or clearer behavior descriptions. Overall, it’s a strong, open-looking option for Firefox speed control, with positive feedback on usability and versatility and caveats about occasional stability and bug-related issues.

Pros

Easy to use and intuitive interface with quick speed switching
Broad compatibility across sites and media; works in many video players
Highly customizable and lightweight design
Great for watching videos at higher speeds (1.5x–2.5x), helpful for elearning

Cons

Reliability issues on Firefox: intermittent audio-video desynchronization after extended fast playback and occasional instability requiring reinstall

Recent reviews

by Fi*****, 2026-06-15

The only thing this addon needs is mouse shortcuts, like scroll wheel for volume. Other than that, a perfect addon

by kn*****, 2026-06-14

by Du*****, 2026-05-16

View all user reviews ›

Is Global Speed - Video Speed Control 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.

Global Speed - Video Speed Control requires some sensitive permissions that could impact your browser and data security. 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.
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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.

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

Risk likelihood analysis details

Medium This extension was updated in the past 3 months. New updates may not be stable or safe.
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