# openstyles/stylus

Stylus - Userstyles Manager

Repository: https://github.com/openstyles/stylus
Canonical: https://ross.abutalabs.com/products/openstyles-stylus
Homepage: https://add0n.com/stylus.html
Language: JavaScript
License: GPL-3.0
License Family: copyleft
Topics: stylish, chrome-extension, opera-addon, firefox-extension, privacy, userstyles, usercss
Last push: 2026-08-26T16:49:13+00:00

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 98, longevity 100
- inputs: {"age_days": 3524, "days_push": 7, "days_rel": 14, "gap_med": 4, "n_releases_24m": 44}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 6848, forks 378 (observed 2026-08-28T04:09:50.860751+00:00)

## What it is
Stylus is a browser extension for Chrome, Firefox, and Chromium-based browsers that lets users restyle websites by installing and managing CSS themes (userstyles). It is a privacy-focused fork of Stylish with no analytics, a built-in CSS/LESS/Stylus editor, and support for UserCSS styles from external galleries.

## Use cases
- install dark themes for websites
- customize the appearance of web pages with css
- manage userstyles across chrome and firefox
- write my own css overrides for a site
- replace stylish without tracking
- sync browser styles via webdav or google drive
- find skins for popular websites

## When to choose
- you want to restyle websites with community themes and no telemetry
- you need a built-in editor with linting and live reload for authoring userstyles
- you want style auto-updates, cloud sync, and JSON backup

## When to avoid
- you need to modify page behavior or scripts rather than appearance
- you want a native desktop theming tool rather than a browser extension

## Facets
- artifact type: plugin
- maturity: active
- function: theme, editor, ui-components, privacy
- domain: browser-extensions, web-design, privacy, developer-tools
- platform: browser-extension, browser, cross-platform
- tags: userstyles, usercss, css-themes, stylish-fork, style-manager, web-restyle

## Member repositories
- openstyles/stylus (main) score 99

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:50.860751+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:41:50.319041+00:00, confidence not recorded.
  - readme: https://github.com/openstyles/stylus (fetched 2026-08-28T04:09:50.860751+00:00, sha 04a2f85cbc79)
  - homepage: https://add0n.com/stylus.html (fetched 2026-08-29T08:38:04.703636+00:00, sha fc2e52e7dd5d)
- Data as of 2026-08-30T08:39:29.467469+00:00.