Examine source code of Everforest Darker v2

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Everforest Darker v2",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(39, 46, 51)",
      "toolbar_text": "rgb(220, 209, 187)",
      "frame": "rgb(39, 46, 51)",
      "tab_background_text": "rgb(149, 153, 153)",
      "toolbar_field": "rgb(55, 65, 69)",
      "toolbar_field_text": "rgb(149, 153, 153)",
      "tab_line": "rgb(39, 46, 51)",
      "popup": "rgb(39, 46, 51)",
      "popup_text": "rgb(220, 209, 187)",
      "toolbar_field_border": "rgb(74, 73, 73)",
      "toolbar_top_separator": "rgb(39, 46, 51)",
      "tab_loading": "rgb(39, 46, 51)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{eec44cf1-93d3-44cf-959f-7c6f97627c80}"
    }
  }
}