Examine source code of Fox Themes

{
  "name": "Fox Themes",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "fox1.jpg"
    },
    "colors": {
      "frame": "rgb(241, 238, 232)",
      "tab_background_text": "rgb(75, 75, 77)",
      "toolbar": "rgb(255, 255, 255)",
      "bookmark_text": "rgb(59, 59, 65)",
      "toolbar_field": "rgba(251, 243, 235, 0.38)",
      "toolbar_field_text": "rgb(75, 75, 77)"
    }
  }
}