Examine source code of Cafe Cat

{
  "name": "Cat Cafe",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Cat Cafe.png"
    },
    "colors": {
      "frame": "rgba(50, 69, 83, 1)",
      "tab_background_text": "rgba(230, 165, 43, 1)",
      "toolbar": "rgba(50, 69, 84, 0)",
      "bookmark_text": "rgba(230, 165, 43, 1)",
      "toolbar_field": "rgba(50, 69, 84, 0)",
      "toolbar_field_text": "rgba(135, 180, 201, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bce992c1-c3c0-4ce5-883d-32f5f293ee82}"
    }
  }
}