Examine source code of YTFix

{
  "manifest_version": 2,
  "name": "YTFix",
  "version": "1.0",
  "description": "Fixes the youtube \"Invalid Response Received\" error by reloading page in background.",
  "icons": {
    "48": "icons/border-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ]
}