Examine source code of IntenTube

{
  "manifest_version": 3,
  "name": "IntenTube",
  "version": "1.0.0",
  "description": "Use YouTube with intention. Block distractions and stay focused on your goals.",
  "browser_specific_settings": {
    "gecko": {
      "id": "intentube@intentube.extension",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "action": {
    "default_popup": "index.html"
  },
  "content_scripts": [
    {
      "js": [
        "assets/index.ts-loader-B5bOAsXo.js"
      ],
      "matches": [
        "*://*.youtube.com/*"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [
    "storage"
  ],
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "web_accessible_resources": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "<all_urls>"
      ],
      "resources": [
        "icon-16.png",
        "icon-48.png",
        "icon-128.png",
        "icon.png",
        "admin.html"
      ],
      "use_dynamic_url": false
    },
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "resources": [
        "assets/analytics-CVWa1MRi.js",
        "assets/index.ts-B8w5mfKo.js"
      ],
      "use_dynamic_url": false
    }
  ]
}