Examine source code of Cat in Jack

{
  "name": "Cat  in Jack",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "CatinJackH.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(250, 223, 113, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(255, 236, 130, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.05)",
      "toolbar_field_text": "rgba(255, 255, 153, 1)",
      "tab_line": "rgba(255, 255, 153, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0bd29768-6e35-4c7d-a1eb-01e15961a815}"
    }
  }
}