FirefoxCSS Hub

Published theme

FlexFox

A lightweight Firefox theme focused on usability, flexibility, and smooth performance.

Open original repository
Repository
github.com/yuuqilin/FlexFox
Stars
244
Last update
Mar 22, 2026
Submitted as
legacy
FlexFox screenshot

Tags

flexiblelightweightmicaminimalsidebery

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