Examine source code of Nyan Cat (Animated)

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Nyan Cat (Animated)",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png",
        "images/2.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "right top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "repeat-x",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 27, 55, 0)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 49, 99)",
      "tab_background_text": "rgb(95, 126, 157)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(213, 215, 247)",
      "tab_line": "rgb(255, 204, 152)",
      "popup": "rgb(15, 61, 108)",
      "popup_text": "rgb(255, 255, 255)",
      "ntp_text": "rgb(255, 255, 255)",
      "tab_selected": "rgba(213, 215, 247, 0.25)",
      "toolbar_top_separator": "rgba(63, 100, 138, 0.5)",
      "tab_loading": "rgb(255, 204, 152)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8d656ba5-0532-4eec-8c8f-766020caef13}"
    }
  }
}