Examine source code of Cartoon Network

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Cartoon Network",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgb(225, 234, 239)",
      "toolbar_text": "rgb(13, 255, 127)",
      "frame": "rgb(57, 117, 153)",
      "tab_background_text": "rgb(0, 255, 186)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(16, 124, 195)",
      "tab_line": "rgb(73, 192, 249)",
      "popup": "rgb(110, 119, 253)",
      "popup_text": "rgb(25, 25, 38)",
      "ntp_text": "rgb(32, 32, 34)",
      "tab_loading": "rgb(73, 192, 249)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4068d144-1326-4856-acf1-1d0ba835a1ad}"
    }
  }
}