Examine source code of sites time machine

{
  "manifest_version": 3,
  "name": "CSS Time Machine",
  "version": "1.0.0",
  "description": "Путешествуйте во времени по изменениям CSS и просматривайте архивные версии страниц",
  "author": "NelikNG",
  "permissions": [
    "activeTab",
    "storage",
    "webNavigation",
    "tabs",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>",
    "https://web.archive.org/*",
    "https://archive.org/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "utils/css-archiver.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "css-time-machine@nelikng.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "websiteContent",
          "browsingActivity"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  }
}