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Top 23 CSS Firefox Projects
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Project mention: Ask HN: Which web browser are you using and why? | news.ycombinator.com | 2025-12-03
Most chromium-based browsers feel the same and its disappointing. If I wasn't as happy with the gnome skin for firefox I'd probably be using Zen [1] because its nice to see a firefox based browser that tries to introduce new features and create an identity of its own instead of joining a size measuring contest on how hard(ened) they are (I respect them, but it's a very saturated market at this point).
[1]: https://github.com/rafaelmardojai/firefox-gnome-theme
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fadblock
Friendly Adblock for YouTube: A fast, lightweight, and undetectable YouTube Ads Blocker for Chrome, Opera and Firefox.
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ArcWTF
A userChrome.css theme to bring Arc Browser look on Windows to Firefox. Work with Windows, Linux and macOS ✨
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WhiteSurFirefoxThemeMacOS
MacOS Big Sur like theme for Firefox on MacOS & Windows. Make your Firefox look like Safari.
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VerticalFox
Firefox theme with Edge like auto-hide vertical tab bar and minimalism design. Powerd by Sidebery.
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Project mention: Making Firefox's right-click not suck with about:config | news.ycombinator.com | 2026-03-04
Also, there's a nice little toolkit for removing items from all the Firefox right-click menus: https://github.com/stonecrusher/simpleMenuWizard.
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slick-fox
:fox_face: A firefox config that has rounded tabs and a url bar that can disappear when not selected on. It works with any theme.
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Project mention: Mozilla is working on a big Firefox redesign, here is what it looks like | news.ycombinator.com | 2026-03-06
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azure-mask
A browser extension (Chromium, Firefox) that toggles concealment of sensitive information found in the Azure Portal web page such as Subscription Id's
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Sweet-Pop
Sweet_Pop! Beautify, Customize Firefox. Minimalist animated oneliner theme for Firefox perfectly matching Sweet Dark.
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 Firefox discussion
CSS Firefox related posts
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Making Firefox's right-click not suck with about:config
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Ask HN: Which web browser are you using and why?
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Why I'm all-in on Zen Browser
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Firexox 136 Desktop gets Vertical Tabs
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Add Water – Keep Firefox in Fashion
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The company behind Arc is now building a second, much simpler browser
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Zen Browser
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A note from our sponsor - SaaSHub
www.saashub.com | 10 Jun 2026
Index
What are some of the best open-source Firefox projects in CSS? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | firefox-gnome-theme | 3,872 |
| 2 | fadblock | 2,398 |
| 3 | CustomCSSforFx | 2,057 |
| 4 | MaterialFox | 1,972 |
| 5 | ArcWTF | 1,731 |
| 6 | Firefox-Mod-Blur | 1,700 |
| 7 | Qogir-theme | 1,661 |
| 8 | WaveFox | 1,233 |
| 9 | firefox-gx | 1,067 |
| 10 | blurredfox | 926 |
| 11 | firefox-sweet-theme | 809 |
| 12 | WhiteSurFirefoxThemeMacOS | 611 |
| 13 | VerticalFox | 609 |
| 14 | simpleMenuWizard | 485 |
| 15 | Firefox-UWP-Style | 453 |
| 16 | firefox-one | 433 |
| 17 | firedragon | 392 |
| 18 | FirefoxCSS | 379 |
| 19 | slick-fox | 378 |
| 20 | shimmer | 362 |
| 21 | azure-mask | 294 |
| 22 | waterfall | 274 |
| 23 | Sweet-Pop | 264 |
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