- Removes unnecessary UI elements for a cleaner look
- Adds a more modern style with smoother, rounded corners
- Simplifies the tab bar for minimal distraction
- Hides toolbar buttons that are rarely used
- Streamlines the bookmark and navigation bars
- Uses subtle colors for a less cluttered appearance
- Download the
userChrome.css
file - In Firefox, open
about:config
, search fortoolkit.legacyUserProfileCustomizations.stylesheets
, and set it totrue
- Navigate to
about:support
, then click "Open Folder" next to "Profile Folder" - Inside the profile folder, create a new folder named
chrome
if it doesn’t already exist - Move the downloaded
userChrome.css
file into thechrome
folder - Restart Firefox to apply the changes