Examine source code of Ash Black (Sage)

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Ash Black (Sage)",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(23, 23, 23)",
      "toolbar_text": "rgb(249, 249, 252)",
      "frame": "rgb(43, 43, 43)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(55, 55, 55)",
      "toolbar_field_text": "rgb(249, 249, 252)",
      "tab_line": "rgb(82, 94, 84)",
      "popup": "rgb(43, 43, 43)",
      "popup_text": "rgb(249, 249, 252)",
      "ntp_background": "rgb(43, 43, 43)",
      "popup_highlight": "rgb(82, 94, 84)",
      "toolbar_field_border_focus": "rgb(55, 55, 55)",
      "toolbar_field_highlight": "rgb(82, 94, 84)",
      "tab_loading": "rgb(82, 94, 84)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{81ea2b80-f429-43dd-8335-3b571991ab94}"
    }
  }
}