Examine source code of Fox Sleeping Animation

{
  "name": "Fox Sleeping Animation",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "animation.png"
    },
    "colors": {
      "frame": "rgba(62, 26, 107, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(255, 255, 255, 0.44)",
      "bookmark_text": "rgba(255, 255, 255, 0.79)",
      "toolbar_field": "rgba(255, 255, 255, 0.74)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(255, 255, 255, 0.83)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4549eecd-d2f9-4f5c-9daa-f946671cbc17}"
    }
  }
}