Firefox Browser Add-ons
  • Extensions
  • Themes
    • for Firefox
    • Dictionaries & Language Packs
    • Other Browser Sites
    • Add-ons for Android
Log in
Preview of Volume Booster & Video Speed Controller

Volume Booster & Video Speed Controller by doppelganger

Boost volume up to 500% and adjust playback speed from 0.1x to 16x with a unique, hover-and-scroll overlay. Simple, privacy-focused, and opensource

Available on Firefox for Android™Available on Firefox for Android™
0 (0 reviews)0 (0 reviews)
5 Users5 Users
Download Firefox and get the extension
Download file

Extension Metadata

Screenshots
About this extension
Volume Booster & Video Speed Controller

Take total control over your browser's media. Whether you’re struggling with a quiet video or want to fly through long lectures without digging into settings menus, this tool is built for you.

✨ Key Features
  • Volume Boost (Up to 500%)
    Sometimes 100% just isn't enough. Using the Web Audio API, you can crank your audio up to 5x the normal volume—perfect for quiet laptop speakers or low-gain recordings.
  • Insane Speed Control
    Go anywhere from 0.1x (super slow-mo) to 16x (warp speed). Our smooth slider ensures you aren't stuck with standard presets.
  • Per-Tab Customization
    Each tab is independent. Boost a quiet video in one window while keeping your background music at a normal level in another.
  • Intuitive Overlay & Mouse Scroll
    Forget clicking the extension icon. A sleek badge appears directly on the video player. You can now tweak volume and speed instantly by simply hovering over the overlay and using your mouse scroll wheel.



🛡️ Transparent & Secure
  • 100% Open Source: Check out the code, fork it, or contribute: https://github.com/Zafkiel-dal/Tab-controller.git
  • Your Data Stays Yours: We don’t collect, store, or transmit any browsing data or personal info. Everything happens locally in your browser. No trackers, no nonsense.



🚀 Quick Start Guide
  1. Open any website with a video or audio player.
  2. Locate the Tab Controller badge (overlay) on the video.
  3. To Adjust Volume/Speed: Simply hover over the overlay and use your Mouse Wheel to scroll up or down.
  4. Enjoy a customized viewing experience!
Rated 0 by 0 reviewers
Log in to rate this extension
There are no ratings yet

Star rating saved

5
0
4
0
3
0
2
0
1
0
No reviews yet
Permissions and data

Required permissions:

  • Access browser tabs
  • Access your data for all websites

Optional permissions:

  • Access your data for all websites

Data collection:

  • The developer says this extension doesn't require data collection.
Learn more
More information
Add-on Links
  • Support site
  • Support Email
  • Copy add-on ID
Version
1.6
Size
3.44 MB
Last updated
6 days ago (May 20, 2026)
Related Categories
  • Photos, Music & Videos
  • Tabs
License
MIT License
Version History
  • See all versions
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. Android is a trademark of Google LLC.