Examine source code of Long Playlist Fix

{
  "manifest_version": 2,
  "name": "Long Playlist Fix",
  "version": "1.0",
  "description": "YouTube currently has a bug where playlists will not autoplay if the video index is over 300. This is a simple fix that clicks on the play-next button once such a video is finished",
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/watch?v=*&list=*&index=*"
      ],
      "js": [
        "content_scripts/click_button.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3da75204-a010-4e12-afe0-469e6661cc6b}"
    }
  }
}