Examine source code of Gruvbox Refine

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Gruvbox Refine",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(81, 73, 68)",
      "toolbar_text": "rgb(250, 247, 197)",
      "frame": "rgb(28, 32, 33)",
      "tab_background_text": "rgb(183, 182, 147)",
      "toolbar_field": "rgba(32, 32, 36, 0)",
      "toolbar_field_text": "rgb(250, 247, 197)",
      "tab_line": "rgb(126, 119, 116)",
      "popup": "rgb(33, 31, 30)",
      "popup_text": "rgb(250, 247, 197)",
      "popup_border": "rgb(67, 71, 70)",
      "tab_loading": "rgb(250, 247, 197)",
      "toolbar_bottom_separator": "rgb(126, 119, 116)",
      "toolbar_field_border_focus": "rgb(250, 247, 197)",
      "toolbar_field_border": "rgba(126, 119, 116, 0)",
      "toolbar_field_focus": "rgb(32, 32, 36)",
      "toolbar_top_separator": "rgb(126, 119, 116)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a03688c9-a93b-4b82-9382-8720341d325e}"
    }
  }
}