FirefoxCSS Hub

Published theme

Pseudo-fullscreen Firefox

Hides and improves interface Firefox and YouTube, giving maximum space for content and aiding concentration

Open original repository
Repository
github.com/ongots/pseudo-fullscreen-firefox
Stars
69
Last update
Feb 28, 2026
Submitted as
legacy
Pseudo-fullscreen Firefox screenshot

Tags

sidebartoolkit

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.