Examine source code of Youtube-shorts block

{
  "manifest_version": 3,
  "name": "Youtube-shorts block",
  "version": "1.5.3",
  "description": "__MSG_ext_desc__",
  "default_locale": "en",
  "icons": {
    "32": "assets/icon32.png",
    "64": "assets/icon64.png",
    "128": "assets/icon128.png"
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://m.youtube.com/*"
      ],
      "js": [
        "main.js"
      ],
      "css": [
        "main.css"
      ]
    }
  ],
  "action": {
    "default_icon": {
      "32": "assets/icon32.png",
      "64": "assets/icon64.png",
      "128": "assets/icon128.png"
    },
    "default_title": "Youtube-shorts block",
    "default_popup": "popup/index.html"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "assets/to_normal.svg"
      ],
      "matches": [
        "*://*.youtube.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{34daeb50-c2d2-4f14-886a-7160b24d66a4}"
    }
  }
}