Examine source code of Koi Carp animated

{
  "name": "Koi Carp animated",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "ezgif.com-resize(5).gif"
    },
    "colors": {
      "frame": "rgba(1, 17, 56, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(1, 13, 48, 0.4)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(79, 117, 93, 0.74)",
      "toolbar_field_text": "rgba(255, 47, 0, 1)",
      "tab_line": "rgba(255, 47, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{47e1ead8-2c26-440a-ba0b-5aed460175dc}"
    }
  }
}