VivaldiFox - An add-on that allows colouring Firefox in a Vivaldi style fashion
Dark Reader - Reduce eye strain in your browser with this extension that provides a dark theme for browsing.
ShadowFox - This project aims at creating a universal dark theme for Firefox while adhering to the modern...
Dark Night Mode - It is a universal night mode for the entire Internet.
Firefox Color - Build Beautiful Firefox Themes
Dark Mode - A global dark theme for the web