Examine source code of Hack The Box v3 Theme

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Hack The Box v3 Theme",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(20, 29, 43)",
      "toolbar_text": "rgb(182, 195, 222)",
      "frame": "rgb(29, 38, 53)",
      "tab_background_text": "rgb(144, 163, 184)",
      "toolbar_field": "rgb(20, 29, 43)",
      "toolbar_field_text": "rgb(159, 239, 0)",
      "tab_line": "rgb(159, 239, 0)",
      "popup": "rgb(20, 29, 43)",
      "popup_text": "rgb(164, 177, 205)",
      "tab_loading": "rgb(159, 239, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{868123c1-25e7-42d8-a294-5415f34f0ee3}"
    }
  }
}