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The simplest possible fully functional one-row userChrome.css theme for Firefox with theming support.
  • CSS 100%
2025年03月10日 21:18:32 -05:00
LICENSE Initial commit 2024年12月30日 21:56:47 +00:00
preview.png Upload preview image 2024年12月30日 22:18:34 +00:00
README.md More minor Readme fixes 2024年12月31日 04:15:02 +00:00
userChrome.css Add support for right-aligned window control buttons 2025年03月10日 21:18:32 -05:00

JustOnebar Firefox userChrome.css

Preview image

The simplest possible fully functional one-row userChrome.css modification for Firefox with complete theming support.

I got fed up with junky Onebar userChrome.css mods that were always broken and removed too much functionality, so I made my own!

It properly supports windows both with and without the system titlebar enabled, the menu bar works properly when opened, and it has been tested at as many window sizes as possible to make darn sure it's not going to break.

Tested on Firefox 132.0.1 (64-bit) but should work on other versions with the Proton UI (89 or later).

Heavily modified from ebastler's firefox-theme: https://github.com/ebastler/firefox-theme

Installation

  1. Open about:config
  2. Search for toolkit.legacyUserProfileCustomizations.stylesheets
  3. Set it to true
  4. Go to about:support
  5. Find the Profile Directory row
  6. Click the Open Directory button
  7. Create a folder named chrome
  8. Copy the userChrome.css file in this repo into that folder
  9. Restart Firefox! 🎉