Stylus

Name: Stylus
Rating: 4.65 (1217 reviews)
Author: Stylus Team

Redesign your favorite websites with Stylus, an actively developed and community driven userstyles manager. Easily install custom themes from popular online repositories, or create, edit, and manage your own personalized CSS stylesheets.

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Install

Features & Capabilities

Stylus is a community-driven manager for userstyles that lets you redesign websites. You can easily install themes from popular repositories or compose, edit, and manage your own CSS styles. Features include a backup of your entire style database, configurable automatic updates, and a highly customizable UI with theming, layouts, and color options.

It also supports installing styles from .user.css or .user.styl URLs, offers optional code validators, and provides straightforward privacy with minimal data collection and clear permission usage. This extension emphasizes user control and compatibility with other userstyles tools.

User Growth & Download Statistics

Add-on Design Open Source Programming Privacy & Security

By:

Stylus Team

Daily users:

124,396 -315

Rating:

4.65

(1,217) 2 new ratings

Version:

2.3.34 Last updated: 2026-06-16

Version code:

6301108

Creation date:

2017-05-14

Risk:

Permissions:

Content scripts matches:

<all_urls>
userstyles.org

Size:

1.14MB

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-16

Compare stats and ranking:

Ranking

# 146 ▼ 3

Other rankings

#4 in Web Development

#9 in Appearance

#2 in status keyword 25

#3 in install keyword 93

#3 in style keyword 32

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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:

Stylus Team

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/styl-us/

Website:

https://github.com/openstyles/stylus/issues

Permission Change History

2022-08-30: Version 1.5.25 → 1.5.26

Remove Permissions: identity

User Reviews

Most reviews praise Stylus for being simple to use and for enabling quick, customizable visual styles. It’s described as very useful and a safer alternative to Stylish. A minority report reliability or compatibility issues with other extensions (such as ad blockers) and some uneven behavior on certain setups, plus a rare claim of broader filtering. Overall, the positives around ease of use and styling flexibility dominate, with occasional notes about compatibility concerns.

Pros

Simple and user-friendly interface
Easy customization of visual styles
Very useful and meets styling needs
Perceived safer alternative to Stylish

Cons

Recent reviews

by Or*****, 2026-06-15

by Fi*****, 2026-06-12

by Al*****, 2026-06-06

View all user reviews ›

Is Stylus 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.

Stylus requires a lot of sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
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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.

Stylus has earned a good reputation and can be trusted.

Risk likelihood analysis details

High This extension was recently updated in the past month. New updates may not be stable or safe.
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