Examine source code of Geometric Graphics

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Geometric Graphics",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(202, 71, 34, 0.61)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(212, 63, 29)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(44, 78, 231, 0.41)",
      "toolbar_field_text": "rgb(255, 249, 251)",
      "tab_line": "rgb(27, 16, 216)",
      "popup": "rgb(18, 72, 117)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(27, 16, 216)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5d13a2e5-8e7b-464a-8969-16226077798c}"
    }
  }
}