Examine source code of Foxy&Earth

{
  "theme": {
    "images": {
      "theme_frame": "grey-fox2.jpg"
    },
    "colors": {
      "frame": "#8ed1d1",
      "tab_background_text": "#ccffff"
    }
  },
  "version": "2.0",
  "name": "Foxy&Earth",
  "manifest_version": 2,
  "description": "This design? My big thanks to Firefox"
}