* [Progressive Web Apps for Firefox v2.20.1](https://github.com/filips123/PWAsForFirefox) – Installs, manages, and runs Progressive Web Apps in Firefox via a modified runtime, command-line tool, and browser extension.

* [Firefox GNOME theme v157.1](https://github.com/rafaelmardojai/firefox-gnome-theme) – CSS code to style Firefox to resemble GNOME's native applications.

* [Firefox Mod Blur v2.80](https://github.com/datguypiko/Firefox-Mod-Blur) – Modular Firefox CSS theme with support for light and dark modes and compact design.

* [Quantum Nox Firefox Customizations FF157](https://github.com/Izheil/Quantum-Nox-Firefox-Customizations) – Firefox tweaks providing multi-row tabs, context menu and UI customizations via userChrome/CSS and JS installers.