OS Features - Extension Edition

Name: OS Features - Extension Edition
Author: Lastie

By: Lastie

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

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Install

Features & Capabilities

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.

User Growth & Download Statistics

Add-on

By:

Lastie

Daily users:

2 -1

Version:

2026.5.20.1 Last updated: 2026-05-21

Version code:

6271065

Creation date:

2026-03-16

Risk:

Permissions:

storage

Content scripts matches:

*.onlinesequencer.net

Size:

84.78KB

Email:

la*****@gmail.com

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-15

Compare stats and ranking:

Ranking

# 66,699 ▼ 11,988

Other rankings

#25 in features keyword 57 ▼ 4#54 in video editing keyword 20 ▼ 10#229 in extention keyword 6 ▼ 57

For Developers

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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:

Lastie

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/os-features-extension-edition/

Email:

la*****@gmail.com

Website:

https://lastie-os.github.io/os-userscripts

Is OS Features - Extension Edition 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.

OS Features - Extension Edition requires very minimum permissions.

Risk impact analysis details

High Injects scripts into web pages, which may alter or extract site contents, resulting in a substantial risk.
Low ******* ****** ** *** ********* ******** *******************

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.

OS Features - Extension Edition 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 was recently updated in the past month. New updates may not be stable or safe.
High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****