Examine source code of heaven

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "heaven",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(158, 157, 151, 0)",
      "toolbar_text": "rgb(238, 229, 194)",
      "frame": "rgb(13, 13, 112)",
      "tab_background_text": "rgb(219, 242, 252)",
      "toolbar_field": "rgba(240, 235, 215, 0)",
      "toolbar_field_text": "rgb(7, 9, 3)",
      "tab_line": "rgb(15, 179, 248)",
      "popup": "rgba(76, 96, 159, 0.57)",
      "popup_text": "rgb(238, 229, 194)",
      "button_background_active": "rgba(246, 191, 60, 0.44)",
      "button_background_hover": "rgba(16, 73, 244, 0.91)",
      "icons_attention": "rgb(84, 89, 89)",
      "ntp_background": "rgb(63, 90, 145)",
      "ntp_text": "rgb(242, 186, 13)",
      "sidebar_border": "rgb(226, 178, 4)",
      "sidebar_highlight": "rgba(247, 224, 35, 0.2)",
      "sidebar_text": "rgb(229, 220, 124)",
      "sidebar": "rgb(58, 72, 134)",
      "tab_selected": "rgba(233, 194, 82, 0.2)",
      "tab_text": "rgb(251, 194, 30)",
      "toolbar_field_border_focus": "rgba(63, 146, 56, 0.64)",
      "toolbar_field_focus": "rgba(58, 79, 143, 0.12)",
      "toolbar_field_highlight": "rgba(125, 125, 234, 0.95)",
      "toolbar_field_text_focus": "rgba(225, 225, 249, 0.95)",
      "tab_loading": "rgb(15, 179, 248)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2526a15f-e460-487c-ab5c-4b0f1bc373a8}"
    }
  }
}