UtNam Dynamic Theme от Utkarsh Naman

`This lightweight add-on places charming cartoon characters on your Firefox toolbar and lets you change the background color.

Simply click the addon icon in your toolbar to open a simple color palette and select your favorite shade. The change happens instantly! The theme is designed to be seamless, making the URL bar transparent so your chosen color and penguin companion are visible across the entire header.

Make your browser truly yours!`