Firefox 상단 탭 없애는 법

1. 아래 명령어 실행

ls ~/Library/Application\ Support/Firefox/Profiles/

2. .default-release로 끝나는 경로 들어가서

   mkdir chrome && vi chrome/userChrome.css

3. userChrome.css 파일에 아래 내용 삽입

   @namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
   
   #tabbrowser-tabs {
       visibility: collapse !important;
   }
   
   #nav-bar {
       border-top: 0px !important;
       margin-left: 200px;
       margin-top: -37px;
   }

4. firefox에서 url에 about:config 입력하고 들어가서

   toolkit.legacyUserProfileCustomizations.stylesheets 옵션 true로 변경

5. firefox 재시작

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참고

• https://superuser.com/questions/1424478/can-i-hide-native-tabs-at-the-top-of-firefox
• https://www.reddit.com/r/kde/comments/10ckq05/comment/j4g8s3k/