# Slowverb

> Slowed and Reverb Audio Effects for Browser Media

Canonical page: [https://chrome-stats.com/d/slowverb](https://chrome-stats.com/d/slowverb)

## Overview

- **ID:** `slowverb`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Norz3n
- **Category:** photos-music-videos
- **Daily users:** 34
- **Weekly downloads:** 2
- **Version:** 1.1.0
- **Last updated:** 2025-12-24
- **First published:** 2025-12-18
- **Size:** 58 KB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/slowverb/)
- **Website:** [https://gitlab.com/norz3n/slowverb/-/issues](https://gitlab.com/norz3n/slowverb/-/issues)

## Description

<strong>Slowverb</strong> brings the iconic Slowed &amp; Reverb aesthetic to your browser. Apply real-time audio effects to any video or audio playing in your tabs.

Features
<ul><li><strong>Speed Control</strong> — Slow down (0.5x) or speed up (1.5x) playback with pitch shift for that classic slowed sound</li><li><strong>Reverb</strong> — Add atmospheric, dreamy reverb to any audio</li><li><strong>Bass Boost</strong> — Enhance low frequencies for deeper, richer sound</li><li><strong>Presets</strong> — Quick access to Slowed &amp; Reverb, Nightcore, and custom presets</li><li><strong>Real-time</strong> — All effects apply instantly as you adjust sliders</li><li><strong>Works on</strong> — YouTube and YouTube Music</li></ul>
How it works

Click the extension icon, toggle it on, and adjust the sliders. Your settings are saved automatically and persist across sessions.

Privacy

Slowverb does not collect any data. All audio processing happens locally in your browser.

Open Source
<ul><li><a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/71faf720f5983efc025fdcd65d169799cf74e187aaf23f78633279f944438387/https%3A//gitlab.com/norz3n/slowverb" rel="nofollow">GitLab Repository</a> (primary source)</li><li><a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/ddccf61ff5f1df07bf74023dc5db75fb2d508d05248d336daf3719e82603490d/https%3A//github.com/norz3n/slowverb" rel="nofollow">GitHub Mirror</a><strong>Slowverb</strong> brings the iconic Slowed &amp; Reverb aesthetic to your browser. Apply real-time audio effects to any video or audio playing in your tabs.</li></ul>
Features
<ul><li><strong>Speed Control</strong> — Slow down (0.5x) or speed up (1.5x) playback with pitch shift for that classic slowed sound</li><li><strong>Reverb</strong> — Add atmospheric, dreamy reverb to any audio</li><li><strong>Bass Boost</strong> — Enhance low frequencies for deeper, richer sound</li><li><strong>Presets</strong> — Quick access to Slowed &amp; Reverb, Nightcore, and custom presets</li><li><strong>Real-time</strong> — All effects apply instantly as you adjust sliders</li><li><strong>Works on</strong> — YouTube and YouTube Music</li></ul>
How it works

Click the extension icon, toggle it on, and adjust the sliders. Your settings are saved automatically and persist across sessions.

Privacy

Slowverb does not collect any data. All audio processing happens locally in your browser.

Open Source
<ul><li><a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/71faf720f5983efc025fdcd65d169799cf74e187aaf23f78633279f944438387/https%3A//gitlab.com/norz3n/slowverb" rel="nofollow">GitLab Repository</a> (primary source)</li><li><a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/ddccf61ff5f1df07bf74023dc5db75fb2d508d05248d336daf3719e82603490d/https%3A//github.com/norz3n/slowverb" rel="nofollow">GitHub Mirror</a></li></ul>

## Rankings

- #19,302 — Overall
- #13 — slow

## Permissions and access

### Permissions

- `storage`
- `activeTab`
- `scripting`

### Host permissions

- `<all_urls>`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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- [Audio Speed & Pitch Control (Pitch Shifter)](https://chrome-stats.com/d/audio-speed-pitch-control) — 1 users

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Source: [Chrome-Stats](https://chrome-stats.com/d/slowverb)