Examine source code of YT StopAutoPlaylist

{
  "manifest_version": 2,
  "name": "YT StopAutoPlaylist",
  "version": "1.0.1",
  "description": "Removes list and index from YouTube URL's",
  "browser_specific_settings": {
    "gecko": {
      "id": "agthomas95@yahoo.com"
    }
  },
  "icons": {
    "48": "pixil-frame-APL.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "stopAPL.js"
      ]
    }
  ],
  "permissions": [
    "*://*/*"
  ]
}