A minimal one-liner, compatible with the latest Firefox 89 and the new Proton interface.
This is a Linux branch, visit the Window-10/11 branch
if you are a Windows user.
- Use with compact density, auto-hide downloads button, remove all flexible space and unnecessary items.
-
In Firefox:
- Open
about:config
- set
toolkit.legacyUserProfileCustomizations.stylesheets
totrue
- set
browser.compactmode.show
totrue
(allows you to enable compact mode)
- set
- Restart Firefox and enable Compact mode in the Customize Toolbar menu
- Open
about:support
, click on Open Folder.
- Open
-
Create a sub-folder named
chrome
. -
Put this file
Linux/userChrome.css
(if you are using Linux) or this fileWindows-10/11/userChrome.css
(if you are using Windows) into that folder (you can download this file by right-click and select Save link as...). -
Restart Firefox
The Tab bar is moved to the right by 5% when the window is floating (not attached to a side, neither maximized). If you have any ideas for fix, please let me know.
Forked from khuedoan98 https://github.com/khuedoan98/one-line-firefox Based on original layout by /u/Herkt and /u/bleeps__:
https://www.reddit.com/r/FirefoxCSS/comments/7eazix/my_attempt_at_a_oneline_interface/
https://www.reddit.com/r/FirefoxCSS/comments/7ignsk/oneline_flat_interface_dark_light/