Dark theme with vibrant colors for Firefox
- Install the add-on like you would normally
If you also want the monospace font (or any font/styles you like if you know CSS):
- Open
about:profiles
- Click
Open Directory
in theRoot Directory
column of the default profile - Create a folder called
chrome
, if not already present - Copy the
userChrome.css
file into the newly created folder - Restart Firefox (pro tip: use
about:restartrequired
- it preserves your tabs)