Stylus

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.

What is Stylus?

"Stylus" is a Firefox add-on developed by the community. It is a userstyles manager that lets you change the look of your preferred websites. With Stylus, you can install custom themes, create, edit and manage personalized CSS stylesheets. Back up your entire database of installed styles and update them automatically. Stylus prioritizes user data privacy and does not collect any data.

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Add-on stats

By: Stylus Team

View on Firefox Browser Add-ons

Users: 107,938 ▼ -1,399

Rating: 4.68 (1,072) ▲ 5 new ratings

Version: 1.5.51 (Last updated: 2024-08-22)

Creation date: 2017-05-14

Weekly download count: 1,992

Firefox on Android: Yes

Risk impact: High risk impact

Risk likelihood: Very low risk likelihood

Manifest version: 2

Permissions:

tabs
webNavigation
webRequest
webRequestBlocking
contextMenus
storage
unlimitedStorage
alarms
<all_urls>

Size: 1.34M

URLs: Website

Ranking

# 211 ▲ 3

Other rankings

#5 in Web Development

#9 in Appearance

#1 in install keyword 70

#3 in status keyword 6

#3 in style keyword 23

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Other platforms

Stylus (beta) (v1.5.50)

4.49

(69) 30,000

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Add-on summary

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Features

Versatility of theme installation options. Stylus supports installs from popular online repositories. Additionally, styles can now also be installed from .user.css or .user.styl URLs (see Usercss format documentation in our github wiki).
A backup feature for your entire database of installed styles which is compatible with other userstyles managers.
An intuitive and configurable automatic update function for installed styles.
A highly customizable UI, including theming, optional layouts, icon and badge color choices, along with many other tweaks.
Two different optional code validators with user configurable rules.

Useful Links

Source code: https://github.com/openstyles/stylus
Video tutorial: https://youtu.be/fCVvGwoF5cQ
Chat room: https://discord.gg/tzXVNJz
Frequently asked questions: https://github.com/openstyles/stylus/wiki/FAQ
Technical bug report: https://github.com/openstyles/stylus/issues
General discussion and bug report: https://add0n.com/stylus.html#reviews
Localization: https://www.transifex.com/github-7/Stylus/dashboard/

Permissions

Stylus uses only a small subset of each permission. As you can see in WebExtensions API documentation or simplified tutorials, there's no way to apply any modifications to a web page without gaining the full access permission to that page. Stylus is mostly used to apply global themes, which is why it requests a global permission. In the future we might be able to implement a more granular approach but it's not exactly trivial.

Access your data for all websites - required for the style elements to be added into the page, not to access any of your data.
Access browser tabs - required to show styles in the popup, and for some auxiliary features like regexp tester in the editor.
Access browser activity during navigation - required to insert the styles at the exact moment the page is navigated to a different URL.
Identity - required for access to cloud services to allow importing and exporting of styles (e.g. Dropbox, etc).

Privacy Policy See more

User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.

Pros