Examine source code of colder mountains

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "cold",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(27, 27, 27)",
      "toolbar_text": "rgb(97, 95, 95)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(204, 204, 204)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(59, 65, 67)",
      "popup": "rgb(27, 27, 27)",
      "popup_text": "rgb(140, 140, 140)",
      "button_background_active": "rgb(52, 51, 55)",
      "button_background_hover": "rgb(31, 31, 31)",
      "frame_inactive": "rgb(96, 96, 96)",
      "icons_attention": "rgb(56, 56, 56)",
      "icons": "rgb(93, 93, 93)",
      "ntp_background": "rgb(118, 118, 118)",
      "ntp_text": "rgb(175, 175, 175)",
      "popup_border": "rgb(60, 63, 63)",
      "popup_highlight": "rgb(59, 79, 94)",
      "sidebar_border": "rgb(63, 63, 63)",
      "sidebar_highlight_text": "rgb(114, 114, 114)",
      "sidebar_highlight": "rgb(69, 69, 69)",
      "sidebar_text": "rgb(135, 134, 138)",
      "sidebar": "rgb(45, 55, 62)",
      "tab_background_separator": "rgb(69, 69, 69)",
      "tab_selected": "rgba(33, 33, 36, 0.37)",
      "tab_text": "rgb(210, 210, 216)",
      "toolbar_field_border_focus": "rgb(36, 36, 36)",
      "toolbar_field_highlight": "rgb(66, 126, 148)",
      "toolbar_field_separator": "rgb(59, 65, 67)",
      "tab_loading": "rgb(59, 65, 67)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9e079c5f-0563-4c6f-9e91-c05bf96bd0c5}"
    }
  }
}