Firefox Browser Add-ons
  • Extensions
  • Themes
    • for Firefox
    • Dictionaries & Language Packs
Log in
Preview of Transpose / Speed / Reverb / Loop - Shifter

Transpose / Speed / Reverb / Loop - Shifter by LmExtensions

Change pitch and speed, plus 13 audio effects such as reverb, bass boost, punch, chorus, lo-fi, vocal boost, pan, treble and more such as loop A/B - for YouTube, Spotify and Apple Music. (pitch changer) (pitch shifter) (audio editor).

5 (3 reviews)5 (3 reviews)
659 Users659 Users
Download Firefox and get the extension
Download file

Extension Metadata

Screenshots
About this extension
Works for YouTube / Spotify / Apple Music + A Built In Audio Editor

The Editor Mode is currently classed as Unstable, their will be bugs until the V1.0 stable release.

--UPDATES--

● Fixed major export bugs for the V0.20 Editor Mode.

● Fixed major cutting bugs for the V0.20 Editor Mode.

● 3D Widener effect has been fixed for the V0.20 Editor Mode.
Rated 5 by 3 reviewers
Log in to rate this extension
There are no ratings yet

Star rating saved

5
3
4
0
3
0
2
0
1
0
Read all 3 reviews
Permissions and data

Required permissions:

  • Access your data for sites in the youtube.com domain
  • Access your data for sites in the amazon.com domain
  • Access your data for sites in the amazon.co.uk domain
  • Access your data for sites in the amazon.de domain
  • Access your data for sites in the amazon.fr domain
  • Access your data for sites in the amazon.es domain
  • Access your data for sites in the amazon.it domain
  • Access your data for sites in the amazon.ca domain
  • Access your data for sites in the amazon.co.jp domain
  • Access your data for sites in the amazon.com.au domain
  • Access your data for open.spotify.com
  • Access your data for music.apple.com

Optional permissions:

  • Access your data for sites in the youtube.com domain
  • Access your data for sites in the amazon.com domain
  • Access your data for sites in the amazon.co.uk domain
  • Access your data for sites in the amazon.de domain
  • Access your data for sites in the amazon.fr domain
  • Access your data for sites in the amazon.es domain
  • Access your data for sites in the amazon.it domain
  • Access your data for sites in the amazon.ca domain
  • Access your data for sites in the amazon.co.jp domain
  • Access your data for sites in the amazon.com.au domain
  • Access your data for open.spotify.com
  • Access your data for music.apple.com

Data collection:

  • The developer says this extension doesn't require data collection.
Learn more
More information
Add-on Links
  • Copy add-on ID
Version
4.50
Size
10.58 MB
Last updated
3 days ago (Nov 9, 2026)
Related Categories
  • Photos, Music & Videos
License
The Unlicense
Version History
  • See all versions
Tags
  • mp3
  • music
  • streaming
  • 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

Download

  • Download Firefox
  • Windows
  • macOS
  • iOS
  • Android
  • Linux
  • All

Latest Builds

  • Nightly
  • Beta

Firefox for Business

  • Enterprise

Community

  • Connect
  • Contribute
  • Developer

Follow

  • Instagram
  • YouTube
  • TikTok
  • Bluesky
  • Podcast
  • 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.