Examine source code of Crazy Shooters Basic Fun

{
  "manifest_version": 2,
  "name": "Crazy Shooters Basic Fun",
  "version": "1.0",
  "description": "The utility is a simplified version of the game Crazy Shooters with simple gameplay. In this game, the player can move and shoot at",
  "permissions": [],
  "browser_action": {
    "default_popup": "game.html",
    "default_icon": {
      "128": "images/crazy-logo.png"
    }
  },
  "icons": {
    "128": "images/crazy-logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{28fd15c6-49bb-4f77-a439-709025382a88}"
    }
  }
}