Examine source code of Skip Ads

{
  "manifest_version": 2,
  "name": "Skip Ads",
  "description": "Skip all annoying ads",
  "version": "1.0.1",
  "icons": {
    "512": "skip-icons.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "skip-ads.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "skip-ads@gmail.com"
    }
  }
}