Examine source code of The fun icon theme

{
  "name": "The fun icon theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "download (6).jpg"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(232, 177, 177, 1)",
      "bookmark_text": "rgba(107, 34, 32, 1)",
      "toolbar_field": "rgba(107, 34, 32, 1)",
      "toolbar_field_text": "rgba(232, 177, 177, 1)",
      "tab_line": "rgba(107, 34, 32, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{aa95c463-ee31-44f3-b12a-d3d6ac544a69}"
    }
  }
}