Examine source code of Button Stealer

{
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "1.0.6.1",
  "default_locale": "en",
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "@button-stealer.anatolyzenkov",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "action": {
    "default_icon": {
      "16": "images/icon-light-16.png",
      "32": "images/icon-light-32.png"
    },
    "default_popup": "popup/popup.html"
  },
  "icons": {
    "16": "images/icon-light-16.png",
    "32": "images/icon-light-32.png",
    "48": "images/icon-light-48.png",
    "128": "images/icon-light-128.png"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://*/*"
  ],
  "optional_permissions": [
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "scripts/service-worker.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "js": [
        "scripts/button-stealer.js"
      ],
      "matches": [
        "https://*/*"
      ]
    }
  ]
}