Examine source code of YouTube Advert Skipper

{
  "manifest_version": 2,
  "name": "YouTube Ad Skipper",
  "version": "1.0",
  "content_scripts": [
    {
      "matches": [
        "https://*.youtube.com/*"
      ],
      "js": [
        "ytAdSkipper.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "skipper.png"
  },
  "icons": {
    "128": "skipper.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d3874eb8-65fe-416f-9e55-f1160e6f4a3d}"
    }
  }
}