Examine source code of Clean YouTube

{
  "manifest_version": 3,
  "name": "Clean YouTube",
  "version": "1.0",
  "description": "Removes YouTube Shorts from the homepage and search results.",
  "author": "Yevhenii Shulha",
  "browser_specific_settings": {
    "gecko": {
      "id": "clean-youtube-extension777@gmail.com"
    }
  },
  "host_permissions": [
    "*://*.youtube.com/*"
  ],
  "permissions": [
    "storage",
    "activeTab"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "YouTube Shorts Remover"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  }
}