FirefoxCSS-Store

Published theme

Firefox WinUI

A custom CSS theme that transforms Firefox to seamlessly integrate with Windows 11's design language.

Open original repository
Repository
github.com/Lockframe/Firefox-WinUI
Stars
145
Last update
Jun 4, 2026
Submitted as
user
Firefox WinUI screenshot 1

Tags

darkfluent

Install overview

  1. Open the original repository and read the maintainer's installation notes.
  2. Enable toolkit.legacyUserProfileCustomizations.stylesheets in about:config.
  3. Create or open the chrome folder in your Firefox profile.
  4. Copy the theme files requested by the original repository and restart Firefox.

Ownership note

FirefoxCSS-Store indexes this submission for discovery. The code, license, support, and installation details belong to the original repository.