FirefoxCSS-Store

Published theme

Natsumi Browser

Beautiful, modern, usable, yet extremely customizable theme for Firefox and its forks. Natsumi keeps your browser's design familiar while adding a modern touch to it.

Open original repository Theme homepage
Repository
github.com/greeeen-dev/natsumi-browser
Stars
666
Last update
May 13, 2026
Submitted as
user
Natsumi Browser screenshot 1Natsumi Browser screenshot 2

Tags

compactcustomizablefloorpgradientoptionsroundedsidebartranslucenttransparencytransparentverticalvertical tabs

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.