Stylish - Custom themes for any website

Name: Stylish - Custom themes for any website
Rating: 2.7367 (976 reviews)
Author: userstyles.org

Stylish lets you customize any website with custom user styles (themes for websites). Choose from the largest userstyles library to change the color scheme, background, and skin for Google, Facebook, YouTube and many, many more sites.

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Install

Features & Capabilities

Stylish is a powerful Chrome extension that allows users to customize the look and feel of any website with personalized themes and styles. With access to the largest library of userstyles, you can effortlessly change color schemes, backgrounds, fonts, and even animations on popular sites such as Google, Facebook, YouTube, Reddit, and more.

Users can easily enable, disable, edit, or remove installed themes and even create their own custom styles using Stylish’s built-in CSS editor. The extension supports a wide range of websites including search engines, social networks, developer sites, and browsers. The vibrant Stylish community encourages theme requests and contributions, ensuring a constantly growing collection of unique skins that cater to all tastes.

Privacy-conscious and user-friendly, Stylish offers tutorials and active community forums for support, making it ideal for both casual users and CSS enthusiasts who wish to personalize their web experience.

User Growth & Download Statistics

Add-on Design Developer Tools

By:

Daily users:

Rating:

Version:

3.1.9resigned1 Last updated: 2024-04-25

Version code:

5725927

Creation date:

2006-02-20

Risk:

Permissions:

Content scripts matches:

<all_urls>
userstyles.org
www.google.com
www.google.ac
www.google.ad
www.google.com.af
www.google.com.ag
www.google.com.ai
www.google.am
www.google.it.ao

Size:

1.89MB

Email:

co*****@userstyles.org

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-16

Compare stats and ranking:

Ranking

# 480

Other rankings

#40 in Web Development

#76 in Appearance

#5 in website keyword 69

#20 in customer keyword 12

#22 in custom feed keyword 21 ▼ 1

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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:

userstyles.org

Firefox Add-ons Store

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

Email:

co*****@userstyles.org

Website:

http://userstyles.org/help/

User Reviews

Overall sentiment is strongly negative: reviewers accuse Stylish of spyware and data collection, complain that the style site is broken and inaccessible, and note the extension often doesn’t function. Several reviews advise switching to Stylus as a safer alternative. A minority mention the ability to apply themes as a potential positive, but reliability and privacy concerns dominate.

Pros

Cons

Spyware / privacy concerns: multiple reviews claim the extension steals or monitors browsing data.
The style site (userstyles.org) is frequently broken or unreachable (bad gateway/502), hindering access to themes.
The extension is reported as not working or dead on Firefox by several users.
Stylus is repeatedly recommended as a safer, more reliable alternative.

Recent reviews

Israeli spyware distributed by Similarweb Ltd.

by Fi*****, 2026-06-03

Stylish has been exposed as spyware. They are spying on you, recording your online activities including your AI chats. This extension should be removed from the extension store.

by tr*****, 2026-06-02

Spyware that sells all your chat history data on AI chatbot websites like ChatGPT, Claude, etc. SELLS your data, and is just an evil company.

by Vi*****, 2026-06-02

View all user reviews ›

Is Stylish - Custom themes for any website 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.

Stylish - Custom themes for any website 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.

Stylish - Custom themes for any website is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

Medium This extension has medium user count. Unpopular extensions may not be stable or safe.
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