Examine source code of Pokemon Battle Predictor

{
  "manifest_version": 2,
  "name": "Pokemon Battle Predictor",
  "version": "0.21",
  "description": "Use machine learning to predict your opponent's moves and the outcome of the battle in Pokemon Showdown!",
  "icons": {
    "48": "icons/icon_48.png",
    "128": "icons/icon_128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://play.pokemonshowdown.com/*",
        "*://replay.pokemonshowdown.com/*",
        "*://*.psim.us/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon_16.png",
      "24": "icons/icon_24.png",
      "32": "icons/icon_32.png"
    }
  },
  "web_accessible_resources": [
    "/pokemonBattlePredictor.js",
    "/anon.js",
    "/loading.png"
  ]
}