Verified on Mozilla

New on Firefox. Built transparently.

Live product facts come from the official Mozilla Add-ons listing — never from invented counters or placeholder reviews.

Distribution Available on Firefox Add-ons

Public listing with a Mozilla-hosted download.

Current release Version 1.1.0

Release information verified against AMO.

Required data collection None declared

Core playback controls stay in your browser.

Guides

Get notified when Chrome launches

UVE for Chrome is almost ready. Leave your email and we will send you the store link.

Built for how you watch

One extension, three audiences that save hours every week.

Students & courses

Watch Udemy and Coursera at 1.5x–2x. Save a "Lectures" template and per-site presets.

UVE for students

Language learners

Slow to 0.75x, boost quiet dialogue, and search subtitles — comprehension over speed.

Explore language learning

Developers & professionals

Move through tutorials and conference talks with precise speed, shortcuts, and saved presets while you work.

UVE for developers

Drag to compare

From limited player to precise control.

Explore how UVE changes speed, audio, and subtitle workflows. The comparison works with mouse, touch, and keyboard.

Everything you need in one extension

Playback speed

Fine control from 0.1x to 16x with presets, sliders, and A/D/S keyboard shortcuts.

Explore video speed control

Volume boost

Web Audio amplification up to 600% — fix quiet laptop speakers without external tools.

Explore volume boost

Subtitles

YouTube captions, OpenSubtitles search, and manual .vtt/.srt upload for language learning.

Explore video subtitles

Templates

Save up to 5 speed/volume combos — switch between "Lectures" and "Movies" in one click.

Per-site memory

YouTube at 1.5x, Udemy at 2x — each domain remembers your preference automatically.

YouTube extras

Restore dislike counts and use the in-page speed bubble on any video.

See it in action

A modern popup — speed, volume, templates, and subtitles in one place.

UVEUltimate Video Enhancer

ACTIVE ON THIS PAGE udemy.comVideo detected Enhancements enabled

ControlsTemplatesSubtitles

Speed1.75x

Playback speed1.75

0.5×1×1.25×1.5×2×

−0.10−0.05+0.05+0.10

Speed control with fine steps and presets

Volume boost for quiet course videos

UVEUltimate Video Enhancer

ControlsTemplatesSubtitles

Subtitles

Auto-find subtitles for the current video by title.

Search onlineApply selected

English (YouTube) ⌄

Manual upload (.vtt / .srt)

Subtitles for learning and accessibility

Activate Pro and customize your setup

UVE vs Video Speed Controller

The most popular speed extension — and what UVE adds on top.

Feature	Video Speed Controller	UVE
Speed control	Yes	✓ 0.1x – 16x
Volume boost	No	✓ Up to 600%
Subtitle search	No	✓ YouTube + OpenSubtitles
Saved templates	Limited	✓ 5 named presets
Per-site settings	Per URL	✓ Per domain + global sync
YouTube dislikes	No	✓ Included
Modern UI	Basic	✓ Dark/light glass design

Feature sets can change between extension versions. Review each current store listing before choosing.

Read the full, criteria-based comparison

Simple pricing

Free up to 3x speed and 200% volume. Upgrade once for lifetime Pro.

Free

€0

Speed up to 3x
Volume boost up to 200%
3 templates
YouTube captions
Keyboard shortcuts

Install free for Chrome Install for Firefox

Launch offer

Pro Lifetime

€24.99 one-time

Full 16x speed
600% volume boost
5 templates
OpenSubtitles search
Subtitle file upload
Performance monitor

Buy Pro — €24.99

Lifetime license · One-time payment · Refund via Stripe

Pro Student

€17 one-time

Everything in Pro
30% student discount
Perfect for Udemy & Coursera

Student — €17

Quick answers

Common questions

Explore all 14 answers

01PricingIs UVE really free to start?

Yes — 3x speed, 200% volume, and core features are free forever. Pro unlocks power-user tools.

02BrowsersIs Chrome available?

Yes — install UVE from the Chrome Web Store. One Pro license works on Firefox and Chrome.

03Pro licenseHow do I activate after purchase?

Your license key arrives by email. Follow our step-by-step activation guide.

Ready to enhance your videos?

Install UVE on Chrome or Firefox — free to start.

Install free for Chrome Firefox Add-ons

Professional video control for every website