- Type in URL BAR
about:config
- skip the warning, continue
- Type
toolkit.legacyUserProfileCustomizations.stylesheets
in page search bar - Double click
false
, It should stay ontrue
- Type
about:support
in URL BAR - Click on
Profile Folder
Button. This is your current Firefox user Profile. - In that same folder, create a folder named
chrome
- Inside of
chrome
make a new text file, open it and save it asuserChrome.css
- Folder structure should look like this:
Profile-Folder-Name/chrome/userchrome.css
- This is just a baseline for custom edits you may want to make
- Any custom themes you download will be going into the chrome folder
- Pictures below