Examine source code of Earthbound: Starman

{
  "name": "Earthbound: Starman",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "the_starman04.gif"
    },
    "colors": {
      "frame": "rgba(3, 0, 59, 1)",
      "tab_background_text": "rgba(186, 166, 189, 1)",
      "toolbar": "rgba(112, 51, 117, 0)",
      "bookmark_text": "rgba(206, 205, 209, 1)",
      "toolbar_field": "rgba(75, 37, 107, 0.73)",
      "toolbar_field_text": "rgba(204, 204, 204, 1)",
      "tab_line": "rgba(199, 195, 199, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{76ab586c-3ef7-4c64-ad65-1d2561f52f37}"
    }
  }
}