Examine source code of Happy Cat Blues

{
  "name": "Happy Cat Blues",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "catzbannerfirefoxheadersmollong.png"
    },
    "colors": {
      "frame": "rgba(97, 168, 230, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(245, 218, 122, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0.73)",
      "toolbar_field_text": "rgba(242, 102, 102, 1)",
      "tab_line": "rgba(245, 108, 103, 0.44)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b1e731d4-3166-4a74-9db9-d9e8f949608b}"
    }
  }
}