Examine source code of Dark, Done Right!

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Theme, Done Right!",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(57, 57, 60)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(40, 40, 41)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(33, 33, 36)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(58, 58, 62)",
      "popup": "rgba(58, 58, 62, 0.97)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(58, 58, 62)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6eb53ba0-33ba-4c97-8af0-5c0acb2dcb49}"
    }
  }
}