Examine source code of Kookaburra

{
  "name": "Kookaburra",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "kookaburra_02.png"
    },
    "colors": {
      "frame": "rgba(100, 187, 219, 1)",
      "tab_background_text": "rgba(26, 169, 201, 1)",
      "toolbar": "rgba(255, 255, 255, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(16, 102, 98, 0.76)",
      "toolbar_field_text": "rgba(98, 204, 190, 1)",
      "tab_line": "rgba(143, 68, 138, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5421116d-0412-4b26-aefb-a3139e7b0319}"
    }
  }
}