Franspose

Name: Franspose
Rating: 5 (1 reviews)
Author: o61iqz

By: o61iqz

Transpose pitch and playback speed for video and audio in the page, with transport controls.

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Features & Capabilities

Firefox extension that transposes pitch and adjusts playback speed for audio and video on the page, with a small transport bar (play/pause, ±1s/±5s). Settings are remembered per page URL in browser.storage.local.

This branch (no-marker-loop) is the 1.0.0-n line: it does not include marker bookmarks or A-B loop playback.

== Features ==

Semitones (−12 … +12) and fine tune (cents) with Signalsmith Stretch audio worklet
Playback speed (0.25× … 2×) with pitch handling via the stretch pipeline.
Effects on/off and reset for the current site.
Light/dark theme (popup + settings); theme preference is stored globally.
Settings page: clear all per-site saved transpose data; diagnostics (version / storage counts only, no URL dump).

Data: Nothing is sent to a remote server; data stays in the browser.

User Growth & Download Statistics

Add-on

By:

o61iqz

Daily users:

12 3

Rating:

5.00

(1)

Version:

1.0.0 Last updated: 2026-04-30

Version code:

6236690

Creation date:

2026-04-27

Risk:

Permissions:

Host permissions:

<all_urls>

Content scripts matches:

<all_urls>

Size:

73.87KB

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-15

Compare stats and ranking:

Ranking

# 29,529 ▲ 3,555

Other rankings

#13 in transpose keyword 37 ▲ 2

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

o61iqz

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/franspose/

User Reviews

Of all the transpose extensions for Firefox, definitely the best ive tried, even better than the top ones that have thousands of users. It actually produces perfect audio rather than crackly and quality-lossy. Recommend 👍🏼

by Ca*****, 2026-05-07

View all user reviews ›

Is Franspose Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Franspose requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Franspose is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Medium **** ********* *** ******* ** *** **** * ******* *** ******* *** *** ** ****** ** *****
Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****
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