Examine source code of Dream Mask

{
  "theme": {
    "images": {
      "theme_frame": "face.jpg"
    },
    "colors": {
      "frame": "#0a3b70",
      "tab_background_text": "#a8ccf0"
    }
  },
  "version": "2.0",
  "name": "Dream Mask",
  "manifest_version": 2,
  "description": "Based on a drawing inspired by a dream"
}