Examine source code of Rate It!

{
  "name": "Rate It!",
  "description": "Rate and discuss every Website you can find.",
  "version": "2.0",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "manifest_version": 2,
  "permissions": [
    "storage",
    "tabs",
    "identity",
    "https://rateit.timon-gaertner.ga/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "js": [
        "jquery.js",
        "content_script_incection_rateIt.js",
        "youtubeVideo.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_action": {
    "default_popup": "extension-popup/index.html",
    "default_icon": {
      "16": "/logos/rateItLogo16.png",
      "32": "/logos/rateItLogo32.png",
      "48": "/logos/rateItLogo64.png",
      "128": "/logos/rateItLogo128.png"
    }
  },
  "icons": {
    "16": "/logos/rateItLogo16.png",
    "32": "/logos/rateItLogo32.png",
    "48": "/logos/rateItLogo64.png",
    "128": "/logos/rateItLogo128.png"
  }
}