Examine source code of YT Premium Enhancer

{
  "manifest_version": 2,
  "name": "YT Premium Enhancer",
  "version": "1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "yt-premium-enhancer-2026@ferozomer.proton.me",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "description": "Replaces YouTube logo with Premium logo and removes ads/upsells.",
  "permissions": [
    "storage",
    "activeTab",
    "tabs",
    "*://*.youtube.com/*"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "YT Premium Enhancer",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    "inject.js"
  ]
}