Examine source code of Summer Will Be Hot ...

{
  "theme": {
    "images": {
      "theme_frame": "gouttes.jpg"
    },
    "colors": {
      "frame": "#ff9500",
      "tab_background_text": "#f5a300"
    }
  },
  "version": "2.0",
  "name": "Summer Will Be Hot ...",
  "manifest_version": 2,
  "description": "Coucher de Soleil sur Mer D'Huile,\nSunset on Glassy Sea,\nSunset,Dew,Drops,Droplets,\nSunshine, Sea,Holidays,Autumn"
}