ColorZilla is a powerful Firefox add-on designed for web developers and designers, allowing users to efficiently capture and manipulate colors directly from their browser. With its eyedropper tool, users can pick any pixel on a webpage and quickly adjust the colors for use in other applications. In addition to this core functionality, ColorZilla includes an advanced color picker similar to Photoshop's, making it versatile for various design tasks.

The add-on also features an ultimate CSS gradient generator and a webpage color analyzer that provides a color palette for any site. With a palette viewer offering seven pre-installed palettes and a color history of recently picked colors, users can easily manage their color selections. Additional capabilities include the ability to display element information, auto-copy picked colors to the clipboard, and use keyboard shortcuts for enhanced efficiency.