By: Samuel Li
Allows YouTube playback at any speed, from 0.1x to 10x. Simple, minimal, and effective.
Features & Capabilities
User Growth & Download Statistics
- By:
- Samuel Li
- Daily users:
- 1,373 -11
- Rating:
- 4.08 (37)
- Version:
- 1.3 Last updated: 2022-06-30
- Version code:
- 5425123
- Creation date:
- 2018-01-28
- Risk:
- High risk impact Low risk likelihood
- Permissions:
- Content scripts matches:
- *.youtube.com
- *.youtube.com
- Size:
- 924.28KB
- Email:
- bu*****@samuelj.li
- Full description:
- See detailed description
- Source:
- Firefox Add-ons Store
- Data ingested on:
- 2026-06-18
- Compare stats and ranking:
- YouTube Speed Controller vs Youtube Playback speed controller
- YouTube Speed Controller vs YouTube-Speed-Controller
- YouTube Speed Controller vs YouTube Custom Playback Speed
Contact the developer
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User Reviews
Pros
- Per-channel default speeds are supported and valued
- Works with playlists and on individual videos
- Lightweight, simple UI that is easy to use
- Quick to set and apply defaults for channels
Cons
- Settings do not persist between restarts / per-channel speeds not reliably saved
- Per-channel defaults are not consistently applied; some channels ignore them
- Speeds can reset when skipping ahead or when ads start
- No support for fractional speeds (no precise values)
- YouTube Music compatibility is limited / domain whitelisting issues (not working well on Music)
Recent reviews
Works OK ish but then randomly applies a setting from a specific channel globally - i.e. bugged mess, not updated in years - bit of a shame on the author.
by Fi*****, 2026-02-11
Is that possible to make it work on YouTube music too? Right now after each new song it changes it's playback speed back to 1 and requires manual setting for each song even when default is different from 1 it starts every song from 1 speed.
Could it be maded like with videos? At which it would hold setted default speed without going back to 1.
by Fi*****, 2025-09-23
Works really well, awesome!
The only gripe I have with this cool add-on is that it does not take into account that the browser (Firefox in this instance) always assumes the tab is set to zero playback speed.
The result is that if I want to reduce playback speed by one tick, I end up at .75 and not the expected 1.75.
Any chance for a fix? Can you take the actual current speed into account?
Keep it up!
by Ol*****, 2025-06-06
Is YouTube 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.
YouTube 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.
YouTube Speed Controller has earned a fairly good reputation and likely can be trusted.
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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