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Top 4 CSS Userstyle Projects
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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
CSS Userstyles related posts
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Show HN: Pdfdark.com – view pdf's in "dark mode" all on client
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Jessi And Jay Park Shut Down Reports Of Conflict In Message To Fans
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Firefox extension to hide likes and dislikes on Reddit?
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Scatterbrained Simp Supervisors - Weekly Discussion Thread, November 8th, 2022
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Windows 10 meets Windows 7
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The redesign is great. Makes the browser look even more modern than all the other ones out there. Mozilla is killing it!
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A note from our sponsor - SaaSHub
www.saashub.com | 16 Jun 2026
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 |