Examine source code of The Blue Sky

{
  "name": "The Blue Sky",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Blue Sky.jpg"
    },
    "colors": {
      "frame": "rgba(64, 128, 255, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(64, 128, 255, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(232, 232, 232, 1)",
      "toolbar_field_text": "rgba(102, 102, 255, 1)",
      "tab_line": "rgba(0, 255, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bf22ab31-4be5-448f-aac0-d7c13227ea67}"
    }
  }
}