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Top 8 CSS css-theme Projects
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AppSignal
Monitoring that respects your time & budget. APM, error tracking, and dashboards for modern web apps. Ten-minute setup, transparent flat pricing, and support from engineers who actually use the product.
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fluentbird
FluentBird is a userChrome.css theme for Mozilla Thunderbird, that implemenets Windows 11 Fluent Design and Mica transparency materials.
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Kargo
Stop Scripting Promotions. Start Shipping with Kargo. Kargo automates promotion across dev, staging, and prod with approval gates and verification. Open source, built by the team behind Argo CD. Download now.
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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 css-theme discussion
CSS css-theme related posts
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Thunderbird: Fluent Windows 11 Design
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Some questions from a noob about using Linux
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UI related questions
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How can i install material fox theme
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Time to contribute into browser wars
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How to fix tab bar getting disoriented after closing tabs?
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Is there any Firefox fork with Chrome UI? (placement of history/bookmarks, shortcut keys, Console window, etc...)
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A note from our sponsor - AppSignal
www.appsignal.com | 11 Sep 2026
Index
What are some of the best open-source css-theme projects in CSS? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | MaterialFox | 1,966 |
| 2 | WaveFox | 1,252 |
| 3 | fluentbird | 676 |
| 4 | firefox-minima | 102 |
| 5 | my_firefox_theme | 91 |
| 6 | Passion-Theme | 7 |
| 7 | praqticalfox | 2 |
| 8 | ff | 2 |
Sponsored
Monitoring that respects your time & budget
APM, error tracking, and dashboards for modern web apps. Ten-minute setup, transparent flat pricing, and support from engineers who actually use the product.
www.appsignal.com