Examine source code of Tranquility by M♥Donna

{
  "name": "Tranquility by M♥Donna",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "TranquilityH.jpg"
    },
    "colors": {
      "frame": "rgba(27, 64, 116, 1)",
      "tab_background_text": "rgba(253, 255, 156, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(251, 255, 0, 1)",
      "toolbar_field": "rgba(26, 62, 117, 0.07)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d1cc1187-f48a-408d-a4e7-5cf09410cfdc}"
    }
  }
}