userchrome

Sine

+16

The ultimate theme manager for Firefox-based browsers.

PWAsForFirefox

+11

A tool to install, manage and use Progressive Web Apps (PWAs) in Mozilla Firefox

Firefox-UI-Fix

+7

🦊 I respect proton UI and aim to improve it.

Firefox-Mod-Blur

+4

Firefox CSS Theme - Dark theme / More compact / Modular / Blur

FF-ULTIMA

+4

The Firefox theme with too many options.. FF Ultima.

firefox-gnome-theme

+4

A GNOME👣 theme for Firefox🔥

WaveFox

+3

Firefox CSS Theme/Style for manual customization

FirefoxCSS-Store.github.io

+2

A collection site of Firefox userchrome themes, mostly from FirefoxCSS Reddit community.