Examine source code of TubeStopper

{
  "manifest_version": 3,
  "name": "TubeStopper",
  "version": "0.1.1",
  "description": "Parental control extension that blocks all YouTube content by default and only allows whitelisted channels.",
  "permissions": [
    "activeTab",
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "*://*.youtube.com/*"
  ],
  "background": {
    "scripts": [
      "src/shared/browser-api.js",
      "src/shared/crypto.js",
      "src/shared/recovery.js",
      "src/shared/storage.js",
      "src/shared/whitelist.js",
      "src/background/session.js",
      "src/background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "src/content/early-hide.js"
      ],
      "css": [
        "src/content/early-hide.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "src/shared/browser-api.js",
        "src/content/channel-extractor.js",
        "src/content/blocker.js",
        "src/content/content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_popup": "src/popup/popup.html",
    "default_title": "TubeStopper"
  },
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tubestopper@plektis.dev",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}