Examine source code of Spiderman In BG

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Spiderman In BG",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(248, 237, 236)",
      "toolbar_text": "rgb(18, 1, 1)",
      "frame": "rgb(243, 223, 223)",
      "tab_background_text": "rgb(15, 2, 1)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(140, 89, 87)",
      "tab_line": "rgb(140, 89, 87)",
      "popup": "rgb(248, 237, 236)",
      "popup_text": "rgb(140, 89, 87)",
      "tab_loading": "rgb(140, 89, 87)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d2478995-5c81-440e-b3d1-02f22552bc4d}"
    }
  }
}