manifest.json

{
  "manifest_version": 2,
  "name": "Youtube auto pause",
  "author": "Daniel van der Meijden",
  "version": "1.0",

  "description": "Use this when following a tutorial, where you are writing along. Use the shortcuts on your system to switch back and forth between youtube and whatever",

  "content_scripts": [
    {
      "matches": ["https://www.youtube.com/watch*"],
      "js": ["index.js"]
    }
  ]
}