Examine source code of Planetary Happiness

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Planetary Happiness",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(42, 0, 86)",
      "toolbar_text": "rgb(248, 185, 112)",
      "frame": "rgb(255, 193, 0)",
      "tab_background_text": "rgb(214, 255, 247)",
      "toolbar_field": "rgb(48, 16, 105)",
      "toolbar_field_text": "rgb(251, 231, 178)",
      "tab_line": "rgb(255, 231, 176)",
      "popup": "rgb(30, 6, 90)",
      "popup_text": "rgb(252, 229, 178)",
      "tab_loading": "rgb(255, 231, 176)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{decf9c2f-cec5-45dd-a5e2-d1c135998510}"
    }
  }
}