Firefox UI Tweaks fixes the look of tabs, removing the need to expend extra brain power to find your current tab. Additionally, it adds optional quality of life tweaks.
- Navigate to
about:configin the address bar and accept the risks. - Search for
toolkit.legacyUserProfileCustomizations.stylesheetsand toggle it totrue(by double clicking on it).
Either of the following two methods work:
-
Using the Firefox troubleshooting page
- Click on ☰ ➝ Help ➝ Troubleshooting Information or navigate to
about:supportin your address bar - Under Application Basics, click on the the Open Folder button. You should now see your profile folder.
- Click on ☰ ➝ Help ➝ Troubleshooting Information or navigate to
-
Using the Firefox command line
- Press Shift+F2
- Enter the command
folder openprofile
-
Inside your profile folder, create a new folder named
chrome(all lower case) -
Inside the chrome folder, copy the
userChrome.cssfrom this repository, or create a symlink to it with the same name (case sensitive)
These are modified instructions from the Firefox subreddit
Feel free to comment out or edit bits you don't like

