Examine source code of Pokemon Team Rocket

{
  "theme": {
    "images": {
      "theme_frame": "FirefoxRocketTopBarBlizzeon.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#b8b8b8"
    }
  },
  "version": "2.0",
  "name": "Pokemon Team Rocket",
  "manifest_version": 2,
  "description": "Team Rocket lives on! All pokemon across the top have been used by Team Rocket members at least once either in the games, anime, or manga; the Rocket Ball in the bottom bar is from the TCG."
}