Ultimate Video Enhancer

Available on Chrome & Firefox

Ultimate Video Enhancer (UVE)

Video Speed & Volume Controller. Control playback speed, boost quiet audio, and keep your settings across compatible video sites. Built for courses, tutorials, YouTube and everyday HTML5 video.

  • 0.1× – 16× speed
  • Up to 600% volume
  • Per-site memory
UVEUltimate Video Enhancer PRO
ACTIVE ON THIS PAGE youtube.com
Video detected Enhancements enabled

Playback

Speed
2.00×
A/D speed · Q/E volume · M mute
More presets

Loudness

Volume
100%Player
Mute100%Boost

Below 100% = site player · Above 100% = loudness boost

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 See listing

Release information verified against AMO.

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Guides

Popular video control guides

Deep dives for the searches people use when they need speed, volume, or subtitles on web video.

Video speed controller0.1×–16× on HTML5 video
Video volume boosterBoost quiet audio up to 600%
Video subtitlesCaptions, OpenSubtitles, SRT/VTT
YouTube speed controllerWatch YouTube at a pace you choose
Online course video speedLectures and training at your pace
Udemy speedLecture pace + per-site memory
Coursera speedCourse video control
Online courses hubUdemy, Coursera, YouTube lectures
UVE vs speed controllersFeature comparison

Built for how you watch

Made for students, online courses, and tutorials — plus YouTube power users and language learners.

Students & courses

Watch Udemy and Coursera at 1.5×–2×. Save a "Lectures" template and use per-site memory.

UVE for students

YouTube & tutorial power users

Fine speed, shortcuts, and remembered setups for tutorials, lectures, and long-form video on YouTube.

UVE for YouTube

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.

Speed comparison: standard player versus UVE precision controls.

Everything you need in one extension

Volume boost

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

Explore volume boost

Templates

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

Per-site memory

YouTube at 1.5×, Udemy at 2× — 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.

Speed control with fine steps and speed buttons
Volume boost for quiet course videos
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 controlYes✓ 0.1× – 16×
Volume boostNo✓ Up to 600%
Subtitle searchNo✓ YouTube + OpenSubtitles
Saved templatesLimited✓ 5 templates
Per-site memoryPer URL✓ Per-site memory + sync across tabs
YouTube dislikesNo✓ Included
Modern UIBasic✓ 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 3× speed and 200% volume. Upgrade anytime with a monthly Pro subscription.

Launch offer

Pro

€2.99 /mo

  • Full 16× speed
  • 600% volume boost
  • 5 templates
  • OpenSubtitles search
  • Subtitle file upload
  • Performance monitor
Get Pro — €2.99/mo

Monthly subscription · Cancel anytime · Billing via Stripe

Pro Student

€1.99 /mo

  • Everything in Pro
  • Student price — €1.99/mo
  • Perfect for Udemy & Coursera
Student — €1.99/mo

Quick answers

Common questions

Explore all 14 answers
01PricingIs UVE really free to start?

Yes — 3× 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