* [Progressive Web Apps for Firefox v2.18.3](https://github.com/filips123/PWAsForFirefox) – Installs, manages, and runs Progressive Web Apps in Firefox via a modified runtime, command-line tool, and browser extension.

* [Sine v2.3.3](https://github.com/CosmoCreeper/Sine) – Community-driven mod and theme manager for Firefox-based browsers with a built-in marketplace and easy mod publishing.

* [Firefox Mod Blur v2.50](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 FF152](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.