Examine source code of Youtube poll remover

{
  "manifest_version": 2,
  "name": "Youtube poll remover",
  "version": "1.0",
  "description": "Removes polls from youtube.",
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "pollremover.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{506e5683-790a-4415-98ea-3b2c0c0a91c7}"
    }
  }
}