Examine source code of Catholic - Last Supper

{
  "name": "Catholic - Last Supper",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "lastsupper.jpg"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 1)",
      "tab_background_text": "rgba(235, 207, 136, 1)",
      "toolbar": "rgba(168, 121, 121, 0.44)",
      "bookmark_text": "rgba(247, 243, 158, 1)",
      "toolbar_field": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a87bb747-15ad-4e40-a301-2e997cf0d61d}"
    }
  }
}