# OS Features - Extension Edition

> Enhance your Online Sequencer experience with a suite of custom themes, workflow fixes, and UI improvements.

Canonical page: [https://chrome-stats.com/d/os-features-extension-edition](https://chrome-stats.com/d/os-features-extension-edition)

## Overview

- **ID:** `os-features-extension-edition`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Lastie
- **Category:** appearance,photos-music-videos,games-entertainment
- **Daily users:** 4
- **Version:** 2026.5.20.1
- **Last updated:** 2026-05-21
- **First published:** 2026-03-16
- **Size:** 85 KB
- **Data as of:** 2026-09-12
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/os-features-extension-edition/)
- **Website:** [https://lastie-os.github.io/os-userscripts](https://lastie-os.github.io/os-userscripts)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/os-features-extension-edition/privacy/](https://addons.mozilla.org/firefox/addon/os-features-extension-edition/privacy/)

## Description

Adds new features and themes to Online Sequencer!

Sequencer features include: 
    - AdBlock
    - MultiSolo (has been added to main site, but will keep for OS Rooms)
    - Slider Text Inputs
    - And a BPM tapper.

Chat features:
    - Midnight Rose theme 
    - Image auto hider
    - Chat user blocker
    - Chat name stylizer (fixed!)
    - And link embeds

Themes:
    - Midnight rose chat theme

Account Management:
    - Adds a drop-down for easy account-swapping

Also adds a small fix to the forums page allowing the chat popup to work.

## Rankings

- #49,941 — Overall
- #24 — features
- #42 — video editing
- #148 — extention

## Permissions and access

### Permissions

- `storage`

### Content script matches

- `*.onlinesequencer.net`

## Safety

- **Risk impact:** Low risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Injects scripts into web pages, which may alter or extract site contents, resulting in a substantial risk.
- 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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Source: [Chrome-Stats](https://chrome-stats.com/d/os-features-extension-edition)