The major benefits of the Any Color add-on besides the fact that the interface changes can be applied without restarting the web browser are the selection and preview of color themes as well as background images for the top and bottom of the web browser. Advanced users can also run so called appearance scripts that can change the web browser’s appearance dynamically.

The creation of a new theme using Any Color could not be easier. It is possible to edit existing themes or create a new one and assign color values and images to it. The theme can be easily tested all the time as the changes are applied instantly to the web browser.

The add-on provides access to additional theme tweaks that can be enabled in the options. This includes compatibility tweaks for several Firefox add-ons like the Colorful Tabs or All-in-One Sidebar add-on. Additional tweaks include changes to contrast, shapes, specific sites and miss tweaks like adding gloss or windows stripes.

A similar add-on for the Firefox web browser is the Personas add-on that allows users to change Firefox themes without restart.