Examine source code of You can do it

{
  "theme": {
    "images": {
      "theme_frame": "8.jpg"
    },
    "colors": {
      "frame": "#cad6de",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "You can do it",
  "manifest_version": 2,
  "description": "Diet dieting weight loss scale salad food healthy life change fork butterfly meter loose body beautiful fitness work challenge optimist optimism smile woman beauty skinny nonfat"
}