Examine source code of Iron Man X2

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Iron Man",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(8, 89, 118, 0.71)",
      "toolbar_text": "rgb(0, 255, 251)",
      "frame": "rgb(8, 89, 118)",
      "tab_background_text": "rgb(70, 212, 209)",
      "toolbar_field": "rgba(8, 89, 118, 0.57)",
      "toolbar_field_text": "rgb(0, 255, 251)",
      "tab_line": "rgb(0, 255, 251)",
      "popup": "rgb(8, 89, 118)",
      "popup_text": "rgb(0, 255, 251)",
      "tab_loading": "rgb(0, 255, 251)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a7e7bfe7-55ce-4b3d-bb5c-81aa3877930f}"
    }
  }
}