Examine source code of Black'n Red

{
  "name": "Black & Red",
  "author": "Nero",
  "manifest_version": 2,
  "version": "1.1",
  "icons": {
    "200": "icon.png"
  },
  "theme": {
    "colors": {
      "frame": "rgb(0, 0, 0)",
      "frame_inactive": "rgb(15, 15, 15)",
      "tab_text": "rgb(200, 200, 200)",
      "tab_background_text": "rgb(180, 180, 180)",
      "tab_background_separator": "rgb(255, 255, 255)",
      "tab_loading": "#800",
      "tab_line": "#800",
      "icons_attention": "#800",
      "toolbar": "#000",
      "toolbar_top_separator": "#000",
      "toolbar_bottom_separator": "#000",
      "toolbar_vertical_separator": "#0f0",
      "toolbar_field": "rgb(30, 30, 30)",
      "toolbar_field_focus": "rgb(30, 30, 30)",
      "toolbar_field_text": "rgb(180, 180, 180)",
      "toolbar_field_text_focus": "rgb(200, 200, 200)",
      "toolbar_field_border": "#000",
      "toolbar_field_border_focus": "#000",
      "toolbar_field_hightlight": "#000",
      "button_background_hover": "#212121",
      "button_background_active": "#323232",
      "icons": "rgb(180, 180, 180)",
      "bookmark_text": "rgb(180, 180, 180)",
      "popup": "rgb(18, 18, 18)",
      "popup_text": "rgb(180, 180, 180)",
      "popup_border": "#800",
      "popup_highlight": "#212121",
      "popup_highlight_text": "rgb(180, 180, 180)",
      "ntp_background": "#000",
      "ntp_text": "rgb(180, 180, 180)",
      "sidebar": "rgb(18, 18, 18)",
      "sidebar_text": "rgb(170, 170, 170)",
      "sidebar_border": "rgb(18, 18, 18)",
      "sidebar_highlight": "#212121",
      "sidebar_highlight_text": "rgb(170, 170, 170)"
    },
    "properties": {
      "content_color_scheme": "dark"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c164ad9a-9170-4e74-81f1-27a9c3eff81e}"
    }
  }
}