Examine source code of skipper

{
  "manifest_version": 2,
  "author": "Erik Trogus",
  "description": "You didn't see anything... right? - Light youtube ad skipper.",
  "name": "skipper",
  "version": "1.1",
  "content_scripts": [
    {
      "js": [
        "./skipper.js"
      ],
      "matches": [
        "*://*.youtube.com/*"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "48": "icons/tux_skipper_48.png",
    "96": "icons/tux_skipper_96.png"
  }
}