Examine source code of AnimeBest

{
  "manifest_version": 3,
  "name": "AnimeBest",
  "version": "1.21",
  "description": "Расширение для аниме-зеркал и расписания.",
  "permissions": [
    "storage",
    "tabs",
    "scripting",
    "alarms"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "AnimeBest",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_popup": "ui/popup.html"
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://anime1.best/*",
        "https://animebest.org/*",
        "https://*.animebesst.org/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "ui/start.html",
        "ui/offline.html",
        "ui/offline.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{6f31cef8-07ac-43c7-9bcd-ea32d5a380d2}"
    }
  }
}