Examine source code of Blues by M♥Donna

{
  "name": "Blues by M♥Donna",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Blues.jpg"
    },
    "colors": {
      "frame": "rgba(35, 5, 116, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(36, 5, 117, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(36, 5, 117, 0.05)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{530db1c7-8a8a-4048-b5b2-6c0afc3c1a6c}"
    }
  }
}