Examine source code of Sydney Harbor

{
  "name": "Sydney Harbor",
  "manifest_version": 2,
  "version": "3.1resigned1",
  "theme": {
    "images": {
      "theme_frame": "SydneyHarborH1.jpg"
    },
    "colors": {
      "frame": "rgba(5, 5, 5, 0)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2d9cf476-3603-47d6-86e0-276db251ac0e}"
    }
  }
}