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Top 11 CSS Userstyle Projects
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SaaSHub
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YouTube-DeepDark
Videos should only be watched in the dark. May the dark be kinder on thine eyes. (YouTube dark theme)
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dark-gitlab
Very customizable dark theme for GitLab and self-hosted GitLab instances. Mirror of gitlab.com/vednoc/dark-gitlab (by vednoc)
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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 Userstyle discussion
CSS Userstyle related posts
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Cleaning up the Reddit page
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Any Google advanced search scripts that work?
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Horizontal Centering
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Is there some dark mode option on the browser website ?
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Can I remove Lastfm Cookie sign? it won't go away, it's becoming annoying.
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Move Google search tools back to sidebar (userstyle/userscript)
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why does my font look like this?
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A note from our sponsor - SaaSHub
www.saashub.com | 6 Jun 2026
Index
What are some of the best open-source Userstyle projects in CSS? This list will help you:
| # | Project | Stars |
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| 1 | GitHub-Dark | 9,907 |
| 2 | StackOverflow-Dark | 690 |
| 3 | Wikipedia-Dark | 489 |
| 4 | YouTube-DeepDark | 255 |
| 5 | google-search-sidebar | 89 |
| 6 | Quora-Dark | 87 |
| 7 | dark-gitlab | 83 |
| 8 | UserCSS | 76 |
| 9 | GitHub-FixedHeader | 62 |
| 10 | DarkNight-FBMessenger | 49 |
| 11 | RedditOldRedesignedDark | 23 |
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