Examine source code of SwiftDial Dark

{
  "manifest_version": 2,
  "version": "3",
  "name": "SwiftDial Dark",
  "description": "__MSG_description__",
  "author": "nScript",
  "homepage_url": "https://nscript.ru/swiftdial/",
  "browser_specific_settings": {
    "gecko": {
      "id": "swiftdialdark@nscript.ru",
      "strict_min_version": "89.0"
    }
  },
  "default_locale": "en",
  "theme": {
    "colors": {
      "button_background_active": "rgb(85, 91, 98)",
      "button_background_hover": "rgb(95, 102, 109)",
      "frame": "rgb(71, 76, 82)",
      "icons_attention": "rgb(146, 153, 160)",
      "ntp_background": "rgb(71, 76, 82)",
      "ntp_text": "rgb(241, 242, 243)",
      "popup": "rgb(71, 76, 82)",
      "popup_border": "rgb(146, 153, 160)",
      "popup_highlight": "rgb(85, 91, 98)",
      "popup_highlight_text": "rgb(241, 242, 243)",
      "popup_text": "rgb(241, 242, 243)",
      "sidebar": "rgb(71, 76, 82)",
      "sidebar_border": "rgb(146, 153, 160)",
      "sidebar_highlight": "rgb(85, 91, 98)",
      "sidebar_highlight_text": "rgb(241, 242, 243)",
      "sidebar_text": "rgb(241, 242, 243)",
      "tab_background_separator": "transparent",
      "tab_background_text": "rgb(241, 242, 243)",
      "tab_line": "transparent",
      "tab_loading": "rgb(146, 153, 160)",
      "tab_selected": "rgb(95, 102, 109)",
      "toolbar": "rgb(71, 76, 82)",
      "toolbar_bottom_separator": "rgb(95, 102, 109)",
      "toolbar_field": "rgb(71, 76, 82)",
      "toolbar_field_border": "rgb(146, 153, 160)",
      "toolbar_field_border_focus": "rgb(146, 153, 160)",
      "toolbar_field_highlight": "rgb(95, 102, 109)",
      "toolbar_field_highlight_text": "rgb(241, 242, 243)",
      "toolbar_field_text": "rgb(241, 242, 243)",
      "toolbar_text": "rgb(241, 242, 243)",
      "toolbar_top_separator": "transparent",
      "toolbar_vertical_separator": "rgb(146, 153, 160)"
    }
  }
}