CSS Userstyles

Open-source CSS projects categorized as Userstyles

Top 4 CSS Userstyle Projects

  1. FirefoxCSS

    Custom firefox interface

  2. SaaSHub

    SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

    SaaSHub logo
  3. InfernalFox

    A minimal FirefoxCSS

  4. hacker-news-bluish-gray

    🌙 Bluish gray theme for Hacker News.

    Project mention: Ask HN: Dark Mode for HN? | news.ycombinator.com | 2025-09-18
  5. BadKarma

    A userstyle to hide all karma on reddit.com.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).

CSS Userstyles discussion

Log in or Post with

CSS Userstyles related posts

  • Show HN: Pdfdark.com – view pdf's in "dark mode" all on client

    2 projects | news.ycombinator.com | 3 Mar 2025
  • Jessi And Jay Park Shut Down Reports Of Conflict In Message To Fans

    1 project | /r/kpop | 7 Dec 2023
  • Firefox extension to hide likes and dislikes on Reddit?

    1 project | /r/firefox | 18 Dec 2022
  • Scatterbrained Simp Supervisors - Weekly Discussion Thread, November 8th, 2022

    1 project | /r/VirtualYoutubers | 10 Nov 2022
  • Windows 10 meets Windows 7

    1 project | /r/Windows10 | 23 Jun 2021
  • The redesign is great. Makes the browser look even more modern than all the other ones out there. Mozilla is killing it!

    3 projects | /r/firefox | 5 Jun 2021
  • A note from our sponsor - SaaSHub
    www.saashub.com | 16 Jun 2026
    SaaSHub helps you find the best software and product alternatives Learn more →

Index

What are some of the best open-source Userstyle projects in CSS? This list will help you:

# Project Stars
1 FirefoxCSS 379
2 InfernalFox 15
3 hacker-news-bluish-gray 13
4 BadKarma 1

Sponsored
SaaSHub - Software Alternatives and Reviews
SaaSHub helps you find the best software and product alternatives
www.saashub.com

Did you know that CSS is
the 19th most popular programming language
based on number of references?