Examine source code of Planet's surface

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Planet's surface",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(189, 242, 255, 0.5)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(196, 102, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 250, 226)",
      "toolbar_field_text": "rgb(168, 0, 0)",
      "tab_line": "rgb(0, 255, 150)",
      "popup": "rgb(227, 204, 183)",
      "popup_text": "rgb(0, 79, 95)",
      "ntp_background": "rgb(219, 206, 177)",
      "ntp_text": "rgb(168, 0, 0)",
      "tab_loading": "rgb(0, 255, 150)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6ebc44fb-986d-42ad-b0c1-68f2079e2f80}"
    }
  }
}