Examine source code of The Message

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "The Message",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top",
        "center bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(34, 0, 139, 0.43)",
      "toolbar_text": "rgb(0, 110, 255)",
      "frame": "rgb(71, 0, 0)",
      "tab_background_text": "rgb(141, 5, 255)",
      "toolbar_field": "rgba(70, 7, 40, 0.78)",
      "toolbar_field_text": "rgb(244, 0, 4)",
      "tab_line": "rgba(255, 55, 244, 0.71)",
      "popup": "rgba(70, 7, 40, 0.75)",
      "popup_text": "rgb(255, 0, 4)",
      "button_background_active": "rgba(111, 0, 2, 0.9)",
      "button_background_hover": "rgba(0, 20, 255, 0.57)",
      "frame_inactive": "rgb(255, 21, 25)",
      "icons_attention": "rgb(255, 21, 25)",
      "icons": "rgb(225, 68, 255)",
      "ntp_background": "rgb(34, 25, 77)",
      "ntp_text": "rgb(141, 5, 255)",
      "popup_border": "rgba(255, 159, 161, 0.62)",
      "popup_highlight_text": "rgb(0, 83, 255)",
      "popup_highlight": "rgb(27, 0, 78)",
      "sidebar_border": "rgb(0, 110, 255)",
      "sidebar_highlight_text": "rgb(0, 110, 255)",
      "sidebar_highlight": "rgb(27, 0, 78)",
      "sidebar_text": "rgb(255, 0, 4)",
      "sidebar": "rgb(70, 7, 40)",
      "tab_background_separator": "rgb(255, 0, 5)",
      "tab_loading": "rgb(255, 0, 4)",
      "tab_selected": "rgba(185, 0, 3, 0.53)",
      "tab_text": "rgb(255, 0, 4)",
      "toolbar_bottom_separator": "rgb(255, 0, 4)",
      "toolbar_field_border_focus": "rgba(255, 0, 4, 0.53)",
      "toolbar_field_border": "rgba(228, 171, 255, 0.5)",
      "toolbar_field_highlight_text": "rgb(225, 68, 255)",
      "toolbar_field_highlight": "rgb(23, 0, 71)",
      "toolbar_field_separator": "rgb(255, 90, 29)",
      "toolbar_field_text_focus": "rgb(255, 0, 4)",
      "toolbar_vertical_separator": "rgb(205, 0, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{964d1db5-6b87-4eca-b195-668566520e83}"
    }
  }
}