Examine source code of no ads

{
  "manifest_version": 3,
  "name": "No ads?",
  "description": "removes ads from youtube",
  "version": "3",
  "icons": {
    "16": "/images/16.png",
    "48": "/images/48.png",
    "128": "/images/128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "js": [
        "no ads-yt.js"
      ],
      "run_at": "document_start"
    }
  ],
  "action": {
    "default_title": "no ads",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e5e1e39b-cbbf-4420-ab20-1558c0157f7d}",
      "strict_min_version": "42.0"
    }
  },
  "permissions": [
    "scripting",
    "activeTab",
    "tabs"
  ]
}