This is what I needed. Popup Background on interface, covers color selector.

Крутое расширение!

Best browser extension I've ever used! Beautiful! Works great! A lot of choices but easy. Can be time consuming depending on amount of customization's you want to make. I love customizing and detail this extension almost has it all. I do wish an element could be added for an image/wallpaper to the background and a microphone icon/voice search in Firefox search bar so that I could used Firefox Default Homepage again. Thanks

Amazing addon

Easy use, good plugin.