Examine source code of Cool_summer

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Cool_summer",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-013-06591d4ad28ab7b9ee90f62f81d6b505.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(233, 237, 240)",
      "toolbar_text": "rgb(12, 138, 211)",
      "frame": "rgb(12, 138, 211)",
      "tab_background_text": "rgb(248, 248, 248)",
      "toolbar_field": "rgb(127, 154, 169)",
      "toolbar_field_text": "rgb(233, 237, 240)",
      "tab_line": "rgb(12, 138, 211)",
      "popup": "rgb(233, 237, 240)",
      "popup_text": "rgb(12, 138, 211)",
      "ntp_background": "rgb(12, 138, 211)",
      "popup_border": "rgb(233, 237, 240)",
      "popup_highlight_text": "rgb(233, 237, 240)",
      "popup_highlight": "rgb(12, 138, 211)",
      "sidebar_highlight_text": "rgb(12, 138, 211)",
      "tab_text": "rgb(12, 138, 211)",
      "toolbar_field_border_focus": "rgb(127, 154, 169)",
      "toolbar_field_border": "rgb(127, 154, 169)",
      "toolbar_field_focus": "rgb(233, 237, 240)",
      "toolbar_field_highlight": "rgb(12, 138, 211)",
      "toolbar_field_text_focus": "rgb(0, 0, 0)",
      "toolbar_top_separator": "rgb(12, 138, 211)",
      "toolbar_vertical_separator": "rgb(12, 138, 211)",
      "tab_loading": "rgb(12, 138, 211)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a7604cab-7b0a-4b2e-bad0-dc27315a7a8b}"
    }
  }
}