Examine source code of Rainbow Country

{
  "name": "Rainbow Country",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "RainbowCountryH.jpg"
    },
    "colors": {
      "frame": "rgba(107, 80, 6, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(255, 209, 130, 1)",
      "toolbar_field": "rgba(107, 80, 5, 0.07)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{63316073-b0fc-4969-80ef-88627aa41b60}"
    }
  }
}