Firefox Browser Add-ons
  • Extensions
  • Themes
    • for Firefox
    • Dictionaries & Language Packs
    • Other Browser Sites
    • Add-ons for Android
Log in
Preview of 600% Sound Volume

600% Sound Volume by Aliaksandr

Up to 600% volume boost

4.5 (3,780 reviews)4.5 (3,780 reviews)
220,504 Users220,504 Users
Download Firefox and get the extension
Download file

Extension Metadata

Screenshots
About this extension
The simplest and most reliable volume booster

🚀 Features

⭐️ Up to 600 % volume boost
⭐️ Control volume of any tab
⭐️ Voice boost - makes dialogues and podcasts easier to hear
⭐️ Fine-grained control: 0 % - 600 %
⭐️ Switch to any tab playing audio with just one click

🚀 What users say

⭐️ "Does exactly what it says it does."
⭐️ "Tried a couple. This one was the best. Thanks!"
⭐️ "What I love about it that it just works :)"
⭐️ "Exactly what I was looking for!"
⭐️ "Definitely the best one and works flawlessly."
⭐️ "I can finally listen to everything I want. I highly recommend it."

🚀 600% Sound Volume — the extension helps you control and boost sound on web pages. It works as an audio control and volume master: you can raise volumen (volume) of audio and video on a page by up to 600%, so it's useful when you need an extra boost and act like a sound bar for pc in the browser.

The addon control panel is simple: you get precise volume mastering and can fine-tune levels in a built-in audio manager. You can make quiet videos louder or push your music higher. The extension gives you master control over master volume master and is handy when the usual speaker volume control is too low, working as an emaster-style tool for web audio.

⁉️ Important note for users

Some videos can go silent after using the add-on. This happens when you see:
"The HTMLMediaElement passed to createMediaElementSource has a cross-origin resource, the node will output silence."

We have not been able to fix this for a long time; it may be a Firefox limitation. 😟 If a video becomes silent, please 🙏 reload the page — in most cases it will play again. We apologize for the inconvenience.
Rated 4.5 by 3,780 reviewers
Log in to rate this extension
There are no ratings yet

Star rating saved

5
2,967
4
343
3
116
2
84
1
270
Read all 3,780 reviews
Permissions and data

Required permissions:

  • Access browser tabs
  • Access your data for all websites
Learn more
More information
Version
2.0.4
Size
221.93 KB
Last updated
10 months ago (Mar 26, 2025)
Related Categories
  • Photos, Music & Videos
  • Tabs
License
Mozilla Public License 2.0
Privacy Policy
Read the privacy policy for this add-on
Version History
  • See all versions
Tags
  • mp3
  • music
  • youtube
Add to collection
Report this add-on
Go to Mozilla's homepage

Add-ons

  • About
  • Firefox Add-ons Blog
  • Extension Workshop
  • Developer Hub
  • Developer Policies
  • Community Blog
  • Forum
  • Report a bug
  • Review Guide

Browsers

  • Desktop
  • Mobile
  • Enterprise

Products

  • Browsers
  • VPN
  • Relay
  • Monitor
  • Pocket
  • Bluesky (@firefox.com)
  • Instagram (Firefox)
  • YouTube (firefoxchannel)
  • Privacy
  • Cookies
  • Legal

Except where otherwise noted, content on this site is licensed under the Creative Commons Attribution Share-Alike License v3.0 or any later version.