- 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.cssfile - 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
chromeif it doesn’t already exist - Move the downloaded
userChrome.cssfile into thechromefolder - Restart Firefox to apply the changes
