Examine source code of Abstract Picture

{
  "name": "Abstract Image",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "1000057872.jpg"
    },
    "colors": {
      "frame": "rgba(211, 215, 224, 1)",
      "tab_background_text": "rgba(199, 64, 64, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "toolbar_field": "rgba(0, 0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5e376b8c-784a-4fbe-b101-45c2215a48f2}"
    }
  }
}