Examine source code of some dark tweaks

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "dark tweaks",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(43, 42, 51)",
      "toolbar_text": "rgb(252, 252, 252)",
      "frame": "rgb(28, 27, 34)",
      "tab_background_text": "rgb(239, 240, 241)",
      "toolbar_field": "rgb(28, 27, 34)",
      "toolbar_field_text": "rgb(252, 252, 252)",
      "tab_line": "rgb(43, 42, 51)",
      "popup": "rgb(43, 42, 51)",
      "popup_text": "rgb(239, 240, 241)",
      "popup_border": "rgb(43, 42, 51)",
      "popup_highlight": "rgb(64, 64, 68)",
      "tab_selected": "rgb(64, 64, 68)",
      "toolbar_bottom_separator": "rgb(43, 42, 51)",
      "tab_loading": "rgb(43, 42, 51)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8ec42644-13ec-4993-af13-439b6a7c0d56}"
    }
  }
}