change firefox theme

How to use Firefox Color to customize the Firefox interface
firefox color is a firefox add-on that helps you personalize the theme on your browser according to your needs, with a very simple way to do it.
How to customize Firefox's new interface Quantum
firefox quantum has many improvements including a new photon user interface. photon replaces the interface australis has been using since 2014 and has many customization options. this article will show you some ways to customize firefox's new interface quantum.