Examine source code of Battlehand Tunnel Vision

{
  "manifest_version": 2,
  "name": "Battlehand Tunnel Vision",
  "version": "1.2.3resigned1",
  "description": "Removes all web content from Battlehand web page except the game and/or the chat.",
  "icons": {
    "48": "icons/bhtv-48.png",
    "96": "icons/bhtv-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.kongregate.com/games/AnotherPlaceProd/battlehand-web*"
      ],
      "js": [
        "bhtv.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0c418bca-d507-420f-9c0a-f084f7398583}"
    }
  }
}