Examine source code of VK Hide Comments

{
  "manifest_version": 3,
  "name": "VK Hide Comments",
  "version": "0.4.3",
  "description": "Toggle comments visibility in VK feed",
  "browser_specific_settings": {
    "gecko": {
      "id": "vk-hide-comments@local",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon48.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://vk.com/*",
        "*://*.vk.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "*://vk.com/*",
    "*://*.vk.com/*"
  ]
}